Fiber-reinforced fully threaded implant

Abstract

A fully threaded implant for use for tissue and bone fixation to restore anatomical relationships has been discovered.

Description

[0001] FIBER-REINFORCED FULLY THREADED IMPLANT

[0002] FIELD OF THE INVENTION

[0003] The present invention relates to medical implants and surgical instruments for bone fixation procedures, and more particularly to fiber-reinforced fully threaded cannulated implants constructed from bioabsorbable composite materials and associated adjustable length drivers and sharpening tools for implant insertion and preparation.

[0004] BACKGROUND OF THE INVENTION

[0005] Screws and nails and other threaded implants currently on the market, require tapping or tapping and counter-sinking the bone tunnel prior to insertion of the implant. Without tapping, the frictional resistance created between the implant threads and the bone tunnel would be very high. That is, currently in implant insertion, a medical professional, for example, a surgeon applies rotational force to an implant through a driver in the head (proximal side) of the implant, however, if the tunnel is not already tapped, a very high amount of torque is created on the implant in order to overcome the frictional force on the distal side of the implant where the threads are engaging with the bone tunnel, preventing the implant from entering the bone. The implants of the present invention are self-tapping and overcome the limitations of the prior art implants.

[0006] Furthermore, screws / nails and other threaded implants currently on the market have typical screw thread geometries which can create very high frictional resistance that can preclude the implementation of differential pitch configurations. The implants of the present invention have, for example, differential pitches over the course of the implant which allow compression to be applied over the length of the implant and overcome the limitations of the prior art implants.

[0007] BRIEF SUMMARY OF THE INVENTION

[0008] A fiber-reinforced fully threaded implant for use for tissue and bone fixation to restore anatomical relationships has been discovered. Such fixation optionally and preferably includes one or more, and more preferably all, of stable fixation, preservation of blood supply to the bone and surrounding soft tissue, and early, active mobilization of the part and patient.

[0009] The inventors have discovered a fiber-reinforced fully threaded implant, which is comprised entirely of biodegradable components, which unexpectedly has the mechanical properties to provide secure bone fixation and to apply compression across the bone fixation site and in some embodiments the implant of the present invention is also self-tapping.

[0010] In one embodiment the present invention is a fully threaded cannulated implant comprising a cannulated shaft, wherein the shaft comprises a wall surrounding at least one cannula; wherein a thickness of the wall is at least 0.5 mm; wherein said shaft comprises: a) a distal end and a proximal end; wherein the distal end comprises at least 50% of the length of the implant and the distal end comprises an external thread, wherein the external thread on the distal end is at a constant pitch; and wherein the proximal end comprises at least 10% of the length of the implant and the proximal end comprises an external thread, wherein the external thread on the proximal end is at a progressive pitch; and b) a plurality of bioabsorbable mineral fibers and a polymer; wherein said mineral fibers comprise a plurality of helical fibers and a plurality of longitudinal fibers; wherein at least 20% of the length of said at least one cannula is non-circular, and wherein at least one width of said non-circular portion of the at least one cannula is at least 1.5 mm.

[0011] In one embodiment, the present invention is a fully threaded cannulated nail.

[0012] In one embodiment, the present invention is a fully threaded cannulated screw.

[0013] In one embodiment, the present invention is a fully threaded cannulated implant comprising a cannulated shaft, wherein the shaft comprises a wall surrounding at least one cannula, wherein a length of the at least one cannula is between 50 and 100%, 70 and 100% or 95 and 100% of the length of the implant. In one embodiment, the present invention is a fully threaded cannulated implant comprising a cannulated shaft, wherein the shaft comprises a wall surrounding at least one cannula, wherein a length of the at least one cannula is 100% of the length of the implant.

[0014] In one embodiment the present invention is a fully threaded cannulated implant comprising a cannulated shaft, wherein the shaft comprises a wall surrounding at least one cannula, wherein at least 20% of the length of said at least one cannula is non-circular, wherein said non-circular portion of said at least one cannula is in the shape of an semicircle, oval, symmetric lens, asymmetric lens, trefoil, quatrefoil, regular polygon, irregular polygon, convex polygon, concave polygon, regular star polygon, irregular star polygon, or reuleaux polygon.

[0015] In one embodiment the present invention is a fully threaded cannulated implant comprising a cannulated shaft, wherein said shaft comprises a distal end and a proximal end and wherein an external threading on the proximal end is at a progressive pitch, and wherein a progressive pitch reduction at the tip of the proximal end is between 5 - 80%, 20 - 70%, or 45-55% compared with the distal end.

[0016] In one embodiment of the present invention, the implants of the present invention are comprised of a biocomposite composite comprising a reinforced bioabsorbable polymer comprised of any of the herein mentioned bioabsorbable polymers and a reinforcing fdler, preferably in fiber form.

[0017] According to the present invention in at least some embodiments, there is provided a fully threaded cannulated implant comprising: a cannulated shaft having a wall surrounding at least one cannula, wherein a thickness of the wall is at least 0.5 mm; wherein said shaft comprises: a) a distal end and a proximal end; wherein the distal end comprises at least 40% of the length of the implant and comprises an external thread at a constant pitch; and wherein the proximal end comprises at least 10% of the length of the implant and comprises an external thread at a progressive or differential pitch; b) a plurality of bioabsorbable mineral fibers and a polymer matrix; wherein said mineral fibers comprise a plurality of helical fibers and a plurality of longitudinal fibers; wherein at least 20% of the length of said at least one cannula is non-circular; and wherein at least one width of said non-circular portion of the at least one cannula is at least 1.5 mm.

[0018] Optionally, the thickness of the wall is between 0.3-2 mm, 0.4-1 mm, or 0.5-0.8 mm. Optionally the length of the implant is between 15 mm and 100 mm, 30 mm and 85 mm, or 60 mm and 70 mm. Optionally a length of the distal end is between 10 mm and 100 mm, 25 mm and 85 mm, or 45 mm and 55 mm. Optionally a length of the distal end is between 40-100%, 50-90%, or 70-80% of the length of the implant. Optionally a length of the proximal end is between 3 mm and 100 mm, 7 mm and 75 mm, or 10 mm and 20 mm. Optionally a length of the proximal end is between 10-60%, 10-50%, or 15-30% of the length of the implant. Optionally the ratio of a length of the distal end to a length of the proximal end is between 1:0.05 and 20: 1, 2: 1 and 10: 1, or 3: 1 and 6: 1. Optionally a progressive pitch reduction at the proximal end is between 5-80%, 20-70%, or 45-55% compared with the distal end. Optionally the ratio of the minimum to the maximum pitch in the proximal end is between 0.05:0.8, 0.2:0.7, or 0.45:0.55. Optionally the external thread comprises more than one pitch, including a first pitch and a second pitch that is unequal to the first pitch, wherein the second pitch may be a predetermined fraction of the first pitch or the first pitch may be an integer multiple of the second pitch. Optionally the external thread has a variable pitch that changes at a regular or irregular rate, a progressive pitch that increases or decreases gradually at a regular rate, or a differential and variable pitch combining multiple pitch types, wherein the variable pitch region has a pitch differential reduction between 5-80%, 20-70%, or 45-55%. Optionally the thread pitch is differential and variable, with the ratio of minimum to maximum pitch being between 0.05:0.8, 0.2:0.7, or 0.45:0.55. Optionally a core diameter of the implant is between 2.5 mm and 6.0 mm, 3 mm and 4.5 mm, or 3.5 mm and 3.8 mm. Optionally a core diameter of a portion of the proximal end of the implant is greater than a core diameter of a portion of the distal end of the implant. Optionally a core diameter of the implant at a portion of the proximal end is between 0.05 mm and 1.5 mm, 0.1 mm and 1 mm, or 0.2 mm and 0.5 mm greater than a core diameter of a portion of the distal end of the implant. Optionally a core diameter of the implant at a portion of the proximal end is between 1-30%, 2-20%, or 3-15% greater than a core diameter of a portion of the distal end of the implant. Optionally a threaded diameter of the implant at a portion of the proximal end is between 0.1-10%, 0.5-7.5%, or 1-5% greater than a threaded diameter of a portion of the distal end of the implant. Optionally the wall tapers outwardly from the cannula at either the distal or proximal end so that the thread and / or core diameter becomes larger at either end of the shaft when compared with the thread and / or core diameter at the opposite end of the shaft. Optionally, a portion of the proximal end with a threaded diameter greater than a threaded diameter of a portion of the distal end of the implant is between 0 and 100 mm, 5 and 50 mm, or 10 and 20 mm in length. Optionally, a portion of the distal end of the implant with a thread diameter smaller than a thread diameter of the proximal end of the implant is between 0 and 100 mm, 5 and 50 mm, or 10 and 20 mm in length. Optionally, a tapered cannula diameter change is between 1- 20%, 1-10%, or 1-5% of the cannula diameter at its largest extent. Optionally, a tapered cannula angle is between 1-15 degrees, 1-10 degrees, or 1-7 degrees. Optionally the external thread has a thread height between 0.2 and 1.5 mm, 0.3 and 0.8 mm, or 0.4 and 0.6 mm. Optionally the external thread has a thread base width between 0.3 and 2.0 mm, 0.4 and 1.5 mm, or 0.5 and 0.8 mm. Optionally the external thread has a thread tip width between 0.01 and 1.0 mm, 0.03 and 0.5 mm, or 0.05 and 0.15 mm. Optionally the external thread comprises a thread leading angle between 5 and 60 degrees, 10 and 45 degrees, or 15 and 25 degrees. Optionally the external thread comprises a thread trailing angle between 1 and 30 degrees, 3 and 20 degrees, or 5 and 15 degrees. Optionally the external thread cross-sectional shape is selected from trapezoid, triangular, rectangular, or continuous sine peaks. Optionally the implant is self-tapping. Optionally a length of the at least one cannula is between 50 and 100%, 70 and 100%, or 95 and 100% of the length of the implant. Optionally a diameter of a circular portion of the at least one cannula is between 1.0 mm and 3.5 mm, 1.5 mm and 2.8 mm, or 1.75 mm and 2.5 mm. Optionally the at least one cannula has a tapered diameter at the proximal end or distal end of the implant. Optionally, a diameter of the cannula increases by between 0 and 20%, 0 and 10%, or 0 and 5% at the proximal end of the implant. Optionally, a diameter of the cannula increases by between 0 and 20%, 0 and 10%, or 0 and 5% at the tip of the proximal end of the implant. Optionally, the tapered cannula diameter change is expressed as a percentage of the cannula diameter at its largest extent and comprises between 1- 20%, 1-10%, or 1-5%. Optionally, the tapered cannula angle is between 1-15 degrees, 1- 10 degrees, or 1-7 degrees. Optionally a length of the non-circular portion of the at least one cannula is between 20 and 100%, 50 and 100%, or 80 and 100% of the length of the implant. Optionally the non-circular portion of the at least one cannula is in the shape of a semicircle, oval, symmetric lens, asymmetric lens, trefoil, quatrefoil, regular polygon, irregular polygon, convex polygon, concave polygon, regular star polygon, irregular star polygon, or reuleaux polygon. Optionally the non-circular portion of the at least one cannula is in the shape of a hexagon, pentagon, square, triangle, or star.

[0019] Optionally, the implant further comprises internal protrusions on an internal surface of the at least one cannula. Optionally, the internal protrusions are positioned at the proximal end of the implant, distributed along the length of the cannula, or both. Optionally, the internal protrusions are in the shape of a sphere, tetrahedron, hexahedron, pentagonal pyramid, or triangular prism. Optionally, the internal protrusions have dimensions between 0.01 and 1.0 mm, 0.02 and 0.7 mm, or 0.1 and 0.5 mm. Optionally the bioabsorbable mineral fibers comprise between 50 and 100%, 70 and 100%, or 80 and 100% longitudinal fibers. Optionally the longitudinal fibers are between 10 mm and 150 mm, 30 mm and 100 mm, or 60 mm and 75 mm in length. Optionally the bioabsorbable mineral fibers comprise between 0 and 50%, 0 and 30%, or 0 and 20% helical fibers. Optionally, the helical fibers are between 50 mm and 1000 mm, 100 mm and 750 mm, or 200 mm and 300 mm in length. Optionally, a winding angle of the helical fibers is between 3 and 45 degrees, 5 and 30 degrees, or 8 and 20 degrees. Optionally the bioabsorbable mineral fibers comprise a glass composition including Na20 (10-19 mol%), CaO (9-14 mol%), MgO (1.5-8 mol%), B2O3(0.5-3 mol%), A12O3(0-0.8 mol%), P2O5(0. 1-0.8 mol%), and Si02(67-73 mol%). Optionally, the glass composition comprises Na20 (11.5-13 mol%), CaO (9-10 mol%), MgO (7-8 mol%), B2O3(1.4-2 mol%), P2O5(0.5-0.8 mol%), and Si02(67-70 mol%). Optionally the polymer matrix comprises a biodegradable polymer selected from polylactides (PLA), poly-L-lactide (PLLA), poly- DL-lactide (PDLLA), poly-LD-lactide (PLDLA), polyglycolide (PGA), polylactide-co- glycolide (PLGA), polycaprolactone (PCL), or combinations thereof. Optionally, the polymer matrix comprises PLDLA with an L:D ratio between 60:40 and 99: 1, or between 70:30 and 96:4. Optionally the polymer matrix has an inherent viscosity between 1.2 and 2.4 dl / g, or between 1.5 and 2.1 dl / g. Optionally the implant comprises a compatibilizer or sizer making up less than 1%, less than 0.5%, or less than 0.3% by weight of the overall composition. Optionally the implant has a density between 1 and 2 g / mL, 1.2 and 1.9 g / mL, or 1.4 and 1.8 g / mL. Optionally the implant achieves complete bioabsorption within 24 months or 12 months.

[0020] Optionally the implant is configured as a fully threaded cannulated nail or fully threaded cannulated screw. Optionally the implant enables trimming at any point along the constant pitch region without adversely impacting compression capability. Optionally the external threading extends over at least 90%, 95%, 98%, or 100% of the external surface length of the implant shaft. Optionally the distal end comprises a tip and the proximal end comprises a head, wherein either or both may be flattened.

[0021] Optionally, there is provided a bone fixation system comprising an implant as described herein, and an adjustable length driver comprising: a) a shaft configured to engage with the cannulated implant; b) a sleeve positioned around at least a portion of the shaft; c) a length adjustment mechanism enabling controlled modification of an operational length of the shaft relative to the sleeve; and d) a length indicator providing visual feedback regarding the current operational configuration of the shaft.

[0022] Optionally, the driver further comprises self-retaining features enabling secure implant engagement regardless of driver orientation. Optionally, the driver comprises a locking mechanism selected from a spring-loaded ball and groove system, compression locking assembly, lever-actuated system, or screw mechanism. Optionally, the driver is cannulated with an internal channel accommodating guide wires. Optionally, the driver comprises an AO quick connector. Optionally there is provided a bone fixation system comprising the implant as described herein, and a sharpening tool comprising: a) a sharpener body; b) an implant sharpening cavity configured to receive the cannulated implant; and c) a sharpening element positioned to enable controlled material removal from the implant. Optionally, the sharpening cavity comprises a proximal cone portion, a cavity straight portion, and a distal cone portion with defined angular geometries. Optionally, the sharpening element is selected from knife configuration, whetstone configuration, thermal element, sandpaper configuration, or combinations thereof. Optionally, the sharpening tool accommodates various implant sizes and cross-sectional geometries.

[0023] Optionally there is provided a comprehensive bone fixation system comprising: the implant as described herein; the adjustable length driver as described herein; and the sharpening tool as described herein; wherein the components have compatible interfaces enabling seamless workflow transitions between implant preparation, driver configuration, and insertion procedures. Optionally, dimensional specifications are coordinated across all components to ensure consistent performance characteristics. Optionally, the driver accommodates sharpened implants without requiring additional adaptation or interface components.

[0024] Optionally there is provided a method of manufacturing the implant as described herein, comprising: providing straight composite material layers comprising bioabsorbable mineral fibers aligned longitudinally within a polymer matrix; providing wound composite material layers comprising bioabsorbable mineral fibers oriented at predetermined angles; arranging multiple layers in a predetermined sequence; and compression molding the arranged layers using controlled temperature and pressure parameters.

[0025] Optionally, the method produces implants with differential pitch threading and progressive pitch characteristics. Optionally, the compression molding uses a tubular mold with a cannulation-forming insert. Optionally, the method comprises customizing implant tip geometry using the sharpening tool; configuring the adjustable driver to appropriate operational length; engaging the driver with the sharpened implant using selfretaining features; and inserting the implant using controlled rotational forces transmitted through the driver. Optionally, the implant is inserted in a self-tapping manner without pre-drilling or tapping of bone. Optionally, compression forces are generated across bone segments during insertion due to the differential or progressive pitch threading.

[0026] For the avoidance of doubt, the terms "filler" and "fiber" are used interchangeably to describe the reinforcing material structure.

[0027] "Biodegradable" as used herein is a generalized term that includes materials, for example polymers, which break down due to degradation in vivo. In one embodiment, the decrease in mass of the biodegradable material within the body is the result of a passive process, which is catalyzed by the physicochemical conditions (e.g. humidity, pH value) within the host tissue. In another embodiment of biodegradable, the decrease in mass of the biodegradable material within the body is eliminated through natural pathways either because of simple filtration of degradation by-products or after the material's metabolism ("Bioresorption" or "Bioabsorption"). In either embodiment, the decrease in mass may result in a partial or total elimination of the initial foreign material. In one embodiment, elimination of the initial foreign material includes partial or complete dispersion in vivo or additionally / altematively includes incorporation or remodeling of part of the initial foreign material into the surrounding in vivo environment. In one embodiment, the implants of the present invention comprise a biodegradable composite which comprises a biodegradable polymer that undergoes a chain cleavage due to macromolecular degradation in an aqueous environment.

[0028] As used herein a polymer is "bioabsorbable" if it is capable of breaking down into small, non-toxic segments which can be metabolized and / or eliminated from the body. In one embodiment, bioabsorbable polymers swell, hydrolyze, and degrade upon exposure to bodily tissue, resulting in a significant weight loss. In one embodiment, the hydrolysis reaction is enzymatically catalyzed. In one embodiment, complete bioabsorption, i.e. greater than 70%, 80%, 90%, 95%, 98% or 100% weight loss, occurs within 24 months or 12 months.

[0029] As used herein the term "polymer degradation" means a decrease in the molecular weight of the respective original polymer. In one embodiment, degradation is induced by free water due to the cleavage of ester bonds. In another embodiment, the degradation of the polymers as for example used in the biomaterial as described in the examples follows the principle of bulk erosion. Thereby a continuous decrease in molecular weight precedes a highly pronounced mass loss. Said mass loss is attributed to the solubility of the degradation products. Methods for determination of water induced polymer degradation are well known in the art such as titration of the degradation products, viscometry, differential scanning calorimetry (DSC).

[0030] The term "biocomposite" as used herein is a composite material formed by a matrix and a reinforcement of fibers wherein both the matrix and fibers are biocompatible and optionally bioabsorbable. In one embodiment, the matrix is a polymer resin, and more specifically a synthetic bioabsorbable polymer. In one embodiment, the fibers are optionally and preferably of a different class of material (i.e. not a synthetic bioabsorbable polymer), and may optionally comprise mineral, ceramic, cellulosic, or other type of material.

[0031] In one embodiment of the present invention, the implants of the present invention are comprised of a shaft and at least one protrusion. In one embodiment, the at least one protrusion is at least partially associated with the outer surface of implant shaft (an external protrusion). In one embodiment, the external protrusion is in the form of a thread. In one embodiment, the external protrusion is in the form of a thread extending over at least 80%, 85%, 90%, 95%, 98% or 100% of the length of external surface of the implant shaft. As used herein, a “fully threaded” implant, comprises a implant of the present invention wherein an external thread extends over at least 90%, 93%, 85%, 97%, 98%, 99% of the external surface of the length of the longitudinal axis of the implant shaft. In one embodiment, a fully threaded implant, comprises a implant of the present invention wherein an external thread extends over at 100% of the external surface of the length of the longitudinal axis of the implant shaft.

[0032] In one embodiment, the implant body and at the least one external protrusion are fabricated as a single component. In one embodiment, the implant body and at the least one protrusion are fabricated as two separate components that are assembled together.

[0033] In one embodiment of the present invention, the implants of the present invention comprise a threaded shaft comprising a proximal end, a distal end. In one embodiment of the present invention, the implants of the present invention comprise a threaded shaft which further comprises a longitudinal axis. As used herein, the proximal end is the end closest to the user, for example, a medical professional, and the distal end is the end is the end to be inserted first into the desired location, for example, bone.

[0034] In one embodiment of the present invention, the implants of the present invention have a cross-section that is substantially circular. In one embodiment of the present invention, the implants of the present invention the implants have a cross-section that is non-circular, for example, oval, ellipse, quadrilateral, triangle, or a combination thereof. As used herein, the term “protrusion” includes spines, barbs, knurls, threads, ribs, ridges, tines, teeth, wedges and fins and any combination thereof. In one embodiment of the implants of the present invention, the protrusions are threads. As used herein, the terms thread and protrusion may be used interchangeably. In one embodiment of the implants of the present invention, the threads are wrapped around the external surface of the implant shaft to form one or more helixes. In one embodiment of the implants of the present invention, the threads are wrapped around the external surface of the implant shaft to join themselves to form one or more individual ribs.

[0035] In one embodiment, the present invention is a fully threaded cannulated implant comprising a shaft wherein the shaft comprises a wall surrounding at least one cannula; wherein a thickness of the wall is at least 0.5 mm; wherein said shaft comprises: a) a distal end and a proximal end; wherein the distal end comprises at least 50% of the length of the implant, wherein the distal end comprises an external thread and wherein the external thread on the distal end is at a constant pitch; and wherein the proximal end comprises at least 10% of the length of the implant, wherein the proximal end comprises an external thread and wherein the external thread on the proximal end is at a progressive pitch; and b) a plurality of bioabsorbable mineral fibers and a polymer; wherein said mineral fibers comprise a plurality of helical fibers and a plurality of longitudinal fibers; wherein at least 20% of the length of said at least one cannula is non-circular; and wherein at least one width of said non-circular portion of the at least one cannula is at least 1.5 mm. As used herein the “width” of the non-circular portion is any single measurement from one internal surface of the cannula to the opposite internal surface of the cannula.

[0036] In one embodiment, the present invention is a fully threaded cannulated implant comprising a shaft wherein the shaft comprises a wall surrounding at least one cannula; wherein said shaft comprises: a distal end and a proximal end, wherein the distal end comprises a tip and the proximal end comprises a head.

[0037] In one embodiment, the present invention is a fully threaded cannulated implant comprising a shaft wherein the shaft comprises a wall surrounding at least one cannula; wherein said shaft comprises: a distal end and a proximal end, wherein the distal end comprises a flattened tip and the proximal end comprises a flattened head. In one embodiment, the present invention is a fully threaded cannulated implant comprising a shaft wherein the shaft comprises a wall surrounding at least one cannula; wherein said shaft comprises: a distal end and a proximal end, and wherein a length of the distal end is between 10 mm and 100 mm, 25 mm and 85 mm, or 45 mm and 55 mm.

[0038] In one embodiment, the present invention is a fully threaded cannulated implant comprising a shaft wherein the shaft comprises a wall surrounding at least one cannula; wherein said shaft comprises: a distal end and a proximal end, and wherein a length of the distal end is between 10 - 100%, 30 - 90% or 70 - 80% of the length of the implant.

[0039] In one embodiment, the present invention is a fully threaded cannulated implant comprising a shaft wherein the shaft comprises a wall surrounding at least one cannula; wherein said shaft comprises: a distal end and a proximal end, and wherein a length of the proximal end is between 3 mm and 100 mm, 7 mm and 75 mm, or 10 mm and 20 mm.

[0040] In one embodiment, the present invention is a fully threaded cannulated implant comprising a shaft wherein the shaft comprises a wall surrounding at least one cannula; wherein said shaft comprises: a distal end and a proximal end, and wherein a length of the proximal end is between 5 - 100%, 10 - 50% or 15 - 30% of the length of the implant.

[0041] In one embodiment, the present invention is a fully threaded cannulated implant comprising a shaft wherein the shaft comprises a wall surrounding at least one cannula; wherein said shaft comprises: a distal end and a proximal end, and wherein the ratio of a length of the distal end to a length of the proximal end is 1:0.05, 0.5:0.1, or 0.3:0.15.

[0042] In one embodiment, the present invention is a fully threaded cannulated implant comprising a shaft wherein the shaft comprises a wall surrounding at least one cannula; wherein said shaft comprises: a distal end and a proximal end, and wherein a progressive pitch reduction in the proximal end is between 5 - 80%, 20 - 70%, or 45-55%.

[0043] In one embodiment of the present invention, the implants of the present invention the external thread has more than one pitch. In one embodiment of the present invention, the implants of the present invention the external thread has a first pitch and a second pitch that is unequal to the first pitch. In one embodiment of the present invention, the first pitch may be greater than the second pitch. In one embodiment of the present invention, and the second pitch may be a predetermined fraction of the first pitch (or the first pitch may be an integer multiple of the second pitch). In one embodiment of the present invention, the second pitch is variable. In one embodiment of the present invention, the second pitch is progressive. In one embodiment of the present invention, the thread pitch is differential and variable.

[0044] In one embodiment, the present invention is a fully threaded cannulated implant comprising a shaft wherein the shaft comprises a wall surrounding at least one cannula; wherein said shaft comprises: a distal end and a proximal end; wherein the distal end comprises at least 50% of the length of the implant and wherein an external threading on the distal end is at a constant pitch; and wherein the proximal end comprises at least 10% of the length of the implant and wherein an external threading on the proximal end is at a progressive pitch; wherein the ratio of the minimum to the maximum pitch in the proximal end is between 0.05:0.8, 0.2:0.7, or 0.45-0.55.

[0045] In one embodiment, the present invention is a fully threaded cannulated implant as described herein, comprising a shaft wherein the shaft comprises a wall surrounding at least one cannula; wherein a thickness of the wall is between 0.3 mm and 2 mm, 0.44 mm and or 0.5mm and 0.8 mm.

[0046] In one embodiment, the present invention is a fully threaded cannulated implant as described herein comprising a shaft wherein the shaft comprises a wall surrounding at least one cannula, wherein the length of the implant is between 15 mm and 100 mm, 30 mm and 85 mm, or 60 mm and 70 mm.

[0047] In one embodiment, the present invention is a fully threaded cannulated implant as described herein comprising a shaft wherein the shaft comprises a wall surrounding at least one cannula, wherein said shaft comprises a distal end and a proximal end, and wherein a core diameter of the implant is between 2.5 mm and 6.0 mm, 3 mm and 4.5 mm, or 3.5 mm and 3.8 mm.

[0048] In one embodiment, the present invention is a fully threaded cannulated implant as described herein comprising a shaft wherein the shaft comprises a wall surrounding at least one cannula, wherein said shaft comprises a distal end and a proximal end, and wherein the wall tapers outwardly from the cannula at either the distal or proximal end so that the thread and / or core diameter becomes larger at either end of the shaft when compared with the thread and / or core diameter at the opposite end of the shaft. In one embodiment, the present invention is a fully threaded cannulated implant as described herein comprising a shaft wherein the shaft comprises a wall surrounding at least one cannula, wherein said shaft comprises a distal end and a proximal end, and wherein a thread diameter of a portion of the proximal end of the implant is greater than a thread diameter of a portion of the distal end of the implant.

[0049] In one embodiment, the present invention is a fully threaded cannulated implant as described herein comprising a shaft wherein the shaft comprises a wall surrounding at least one cannula, wherein said shaft comprises a distal end and a proximal end, and wherein a core diameter of a portion of the proximal end of the implant is greater than a core diameter of a portion of the distal end of the implant.

[0050] In one embodiment, the present invention is a fully threaded cannulated implant as described herein comprising a shaft wherein the shaft comprises a wall surrounding at least one cannula, wherein said shaft comprises a distal end and a proximal end, and wherein a core diameter of the implant of a portion of the proximal end is between 0.05 mm and 1.5 mm, 0.1 mm and 1 mm, or 0.2 mm and 0.5 mm greater than a core diameter of a portion of the distal end of the implant.

[0051] In one embodiment, the present invention is a fully threaded cannulated implant as described herein comprising a shaft wherein the shaft comprises a wall surrounding at least one cannula, wherein said shaft comprises a distal end and a proximal end, and wherein a core diameter of the implant of a portion of the proximal end is between 1 - 30%, 2 - 20%, or 3 - 15% greater than a core diameter of a portion of the distal end of the implant.

[0052] In one embodiment, the present invention is a fully threaded cannulated implant as described herein comprising a shaft wherein the shaft comprises a wall surrounding at least one cannula, wherein said shaft comprises a distal end and a proximal end, and wherein a threaded diameter of the implant of a portion of the proximal end is between 0.1 - 10%, 0.5 - 7.5%, or 1 - 5% greater than a threaded diameter of a portion of the distal end of the implant.

[0053] In one embodiment, the present invention is a fully threaded cannulated implant as described herein comprising a shaft wherein the shaft comprises a wall surrounding at least one cannula, wherein said shaft comprises a distal end and a proximal end, and wherein a portion of the proximal end with a threaded diameter greater than a threaded diameter of a portion of the distal end of the implant is between 0 and 100 mm, 5 and 50 mm or 10 and 20 mm in length.

[0054] In one embodiment, the present invention is a fully threaded cannulated implant as described herein comprising a shaft wherein the shaft comprises a wall surrounding at least one cannula, wherein said shaft comprises a distal end and a proximal end, and wherein a core diameter of a portion of the distal end of the implant is smaller than a core diameter of the proximal end of the implant.

[0055] In one embodiment, the present invention is a fully threaded cannulated implant as described herein comprising a shaft wherein the shaft comprises a wall surrounding at least one cannula, wherein said shaft comprises a distal end and a proximal end, and wherein a core diameter of the implant of a portion of the distal end is between 0.5 mm and 1.5 mm, 0.1 mm and 1 mm, or 0.4 mm and 0.7 mm smaller than a core diameter of the proximal end of the implant.

[0056] In one embodiment, the present invention is a fully threaded cannulated implant as described herein comprising a shaft wherein the shaft comprises a wall surrounding at least one cannula, wherein said shaft comprises a distal end and a proximal end, and wherein a core diameter of the implant of a portion of the distal end is between 1 - 40%, 5 - 30%, or 10 - 20% smaller than a core diameter of the proximal end of the implant.

[0057] In one embodiment, the present invention is a fully threaded cannulated implant as described herein comprising a shaft wherein the shaft comprises a wall surrounding at least one cannula, wherein said shaft comprises a distal end and a proximal end, and wherein a portion of the distal end of the implant with a thread diameter smaller than a thread diameter of the proximal end of the implant is between 0 and 100 mm, 5 and 50 mm, or 10 and 20 mm in length.

[0058] As used herein, the “core diameter” is the diameter of the implant not including any external threads. As used herein, the “thread diameter” is the diameter of the implant including the other most point of any one of the external threads.

[0059] As used herein, the term “pitch” is the distance between screw threads.

[0060] As used herein the term “progressive” describes a pitch which increases or decreases gradually at regular rate to get smaller or larger, for example, at an exponential or logarithmic rate.

[0061] As used herein the term “constant” describes a pitch which does not change over s known length of the implant.

[0062] As used herein the term “variable” describes a pitch which changes at a regular and / or irregular rate. As used herein the term “differential” describes more than one pitch on an implant, wherein one pitch is, for example, constant and the other pitch is for example variable, as used here in this is an example of a “variable differential” pitch.

[0063] The present invention provides a solution to the problems of the prior art by providing, in at least some embodiments, implant compositions with fiber reinforced biocompatible composite materials that are a significant step forward from previous implants in that they can achieve compression over the entire length of the implant. The present invention therefore overcomes the limitations of previous approaches and provides medical implants comprising biodegradable biocomposite compositions featuring fiber reinforced nails that have superior mechanical properties and in some embodiments are self-tapping.

[0064] The dimensions and values disclosed herein are not to be understood as being strictly limited to the exact numerical values recited. Instead, unless otherwise specified, each such dimension is intended to mean both the recited value and a functionally equivalent range surrounding that value. For example, a dimension disclosed as “40 wt.%” is intended to mean “about 40 wt.%”.

[0065] BRIEF DESCRIPTION OF THE DRAWINGS

[0066] The invention is herein described, by way of example only, with reference to the accompanying drawings. With specific reference now to the drawings in detail, it is stressed that the particulars shown are by way of example and for purposes of illustrative discussion of the preferred embodiments of the present invention only, and are presented in order to provide what is believed to be the most useful and readily understood description of the principles and conceptual aspects of the invention. In this regard, no attempt is made to show structural details of the invention in more detail than is necessary for a fundamental understanding of the invention, the description taken with the drawings making apparent to those skilled in the art how the several forms of the invention may be embodied in practice. In the drawings:

[0067] Figures 1A and IB are side views of an example of a cannulated threaded implant with progressive pitch. Figure 1C is a cross-section view of an example of the cannulated threaded implant. Figure ID shows an implant with a differential and variable pitch area. Figure IE shows an implant with a variable pitch area. Figures 2A-2H, are cross-section views of examples of cannulated threaded implants with different shaped threads, wherein Figures 2A, C, E, and G show full length cannulated implants and Figures 2B, D, F and H show an expanded view of the cross-section of the thread shape.

[0068] Figure 3 is a cross-section view of an example of a thread where 301 is the tip, 302 is the thread height, 303 is the base, 304 is the thread tip width, and 305 is the thread base width.

[0069] Figures 4A and 4B are cross-sections views of an example of a thread where 401 is the thread leading angle, 402 is the thread training angle, 403 is the thread base leading radius and 404 is the thread trailing radius.

[0070] Figures 5A-5E and Figure 6 are cross-sectional views of examples of different shaped cannulas.

[0071] Figure 7 is a cross-section view of an example of a cannulated threaded implant with a tapered cannula.

[0072] Figures 8-10 relate to a tapered threaded implant.

[0073] Figures 11 and 12 relate to cannulated threaded implants with differential thread pitch.

[0074] Figure 13 relates to a driver support length.

[0075] Figures 14A and 14B relate to self-retaining features of the implant.

[0076] Figure 15 is a cross-section view of an example of a cannulated threaded implant showing different shaped internal protrusions as interference points.

[0077] Figure 16 shows an exemplary threaded implant with a differential thread outer diameter for a portion of the implant.

[0078] Figure 17 features an example of a threaded implant with a proximal core diameter change and a proximal core angle change.

[0079] Figure 18 features an example of a threaded implant with a distal conical core diameter change and a distal conical core angle change.

[0080] Figure 19A illustrates a side view of an adjustable length cannulated driver, according to aspects of the present disclosure.

[0081] Figure 19B depicts a side view of the adjustable length cannulated driver of Figure 19A with dimensional features, according to an embodiment.

[0082] Figure 19C illustrates a side view of a cannulated threaded implant with progressive pitch, according to aspects of the present disclosure.

[0083] Figure 19D depicts a side view of the cannulated threaded implant of Figure 19C, according to an embodiment. Figure 19E illustrates the driver with a minimal operational length, according to aspects of the present disclosure.

[0084] Figure 19F depicts the driver with a maximal operational length, according to an embodiment.

[0085] Figure 20A illustrates a cross-sectional view of a shaft with dimensional features, according to aspects of the present disclosure.

[0086] Figure 20B depicts a cross-sectional view of a sleeve with cannulation features, according to an embodiment.

[0087] Figure 20C illustrates a cross-sectional view of the sleeve with dimensional features, according to aspects of the present disclosure.

[0088] Figure 21 depicts a side view of an operational shaft with a length indicator, according to an embodiment.

[0089] Figure 22 illustrates a cross-sectional view of a locking mechanism, according to aspects of the present disclosure.

[0090] Figure 23A depicts a side view of a driver with an AO quick connection, according to an embodiment.

[0091] Figure 23B illustrates a side view of the driver of Figure 23Awith dimensional features, according to aspects of the present disclosure.

[0092] Figure 24A depicts the driver at a maximal operational length, according to an embodiment.

[0093] Figure 24B illustrates the driver at a minimal operational length, according to aspects of the present disclosure.

[0094] Figure 25 depicts a side view of a driver with a length indication feature, according to an embodiment.

[0095] Figure 26A illustrates a compression locking assembly, according to aspects of the present disclosure.

[0096] Figure 26B depicts a locking mechanism with spring-loaded components, according to an embodiment.

[0097] Figure 27A illustrates a perspective view of a sharpener assembly, according to aspects of the present disclosure.

[0098] Figure 27B depicts orthogonal views of the sharpener assembly with dimensional features, according to an embodiment.

[0099] Figure 27C illustrates orthogonal views of the sharpener assembly of Figure 27B, according to aspects of the present disclosure. Figure 27D depicts a cross-sectional view of the sharpener assembly with cavity features, according to an embodiment.

[0100] Figure 27E illustrates a cross-sectional view of the sharpener assembly with dimensional specifications, according to aspects of the present disclosure.

[0101] DETAILED DESCRIPTION OF THE INVENTION

[0102] Figures 1A and IB are side views of an example of a cannulated threaded implant with progressive pitch. Implant 100 features a threaded shaft 101, with a distal end tip 106 and a proximal end head 107. The dimensions of implant 100 preferably comprise an implant length 102, a thread diameter 103 and a core diameter 104. The threads feature a thread pitch 105. Either or both of distal end tip 106 and / or proximal end head 107 may be flat or at least flattened.

[0103] Implant 100 is preferably fully threaded along threaded shaft 101. Preferably, sections of threaded shaft 101 feature differential pitch. For example, threaded shaft 101 may feature a distal section 120 that is of constant thread pitch, and a proximal section 122 that is of variable thread pitch.

[0104] An art-known differentially pitched screw has two distinct sections of thread pitch, and a non-threaded area in between them, over which the compression force is applied. The fracture line or other breakage line within a bone or between two bones being fused would be targeted in this non threaded area so that the compressive force is applied across the fracture line in order to approximate the bone segments. On the other hand, an art-known progressively threaded implant would be progressively threaded over the entire length of the implant so as to be able to apply compression over the entire length of the implant and the fracture line can be located anywhere over the length of the implant.

[0105] By contrast, as shown in Figures 1A and IB, compression is actually applied across a constant threaded segment of the threaded implant. One of ordinary skill in the art would expect the threads to prevent such compression from being created across the threaded segment. However, the specific thread geometries employed in the threaded implants as described herein have sufficient purchase in the bone to generate compression along the threaded segment, while avoiding an excess of sliding friction that could prevent compression from being generated across the threaded segment.

[0106] The threaded implant design as described herein has the further desirable feature, without wishing to be limited by a closed list, of being capable of being trimmed anywhere along the constant threaded segment without adversely impacting the implants ability to generate compression.

[0107] Implant 100 may feature a cannula 140. Figure 1C is a cross-section view of implant 100, showing cannula 140, featuring a cannula diameter 601 and a cannula length 602.

[0108] Implant length 102 may comprise various suitable ranges of lengths, including but not limited to optionally 15-100 mm, preferably 30-85 mm and more preferably 60-70 mm.

[0109] Cannula length 602 may comprise various suitable ranges of lengths, calculated as a percentage of implant length 102, including but not limited to optionally 50-100 %, preferably 70-100% and more preferably 95-100%. Cannula diameter 601 may comprise various suitable ranges of lengths, including but not limited to optionally 1.0-3.5 mm, preferably 1.5-2.8 mm, and more preferably 1.75-2.5 mm.

[0110] Figure ID shows implant 100 with a constant pitch area 150 having a length 151, and a differential and variable pitch area 152 having a length 153.

[0111] Figure IE shows implant 100 with constant pitch area 150 having length 151, and a variable pitch area 154 having a length 155.

[0112] Implant thread pitch may be constant, variable, differential and / or a combination thereof. Length 151 may be in any suitable range of lengths, including but not limited to optionally 10-100 mm, preferably 25-85 mm and more preferably 45-55 mm. As a percentage of the entire length of implant 100, length 151 may be in any suitable range of percentages, including but not limited to optionally 10-100%, preferably 30-90% and more preferably 70- 80%. Lengths 153 and / or 155 may be in any suitable range of lengths, including but not limited to optionally 3-100 mm, preferably 7-75 mm and more preferably 10-20 mm. Lengths 153 and 155 may be the same or different lengths.

[0113] As a percentage of the entire length of implant 100, lengths 153 and / or 155 may be in any suitable ranges of percentages, including but not limited to optionally 5-100%, preferably 10-50% and more preferably 15-30%. Lengths 153 and 155 may be the same or different percentage of the entire length of implant 100. Preferably lengths 153 and / or 155 are not trimmable, to maintain the compression feature and the functionality of implant 100.

[0114] The variable to constant pitch area ratio may comprise any suitable ratio, including but not limited to optionally 0.05-1, preferably 0. 1-0.5 and more preferably 0. 15-0.3.

[0115] Within the differential and variable pitch area 154, the pitch differential reduction may be expressed as a percentage of length 155 and may comprise any suitable percentage range, including but not limited to optionally 5-80%, preferably 20-70% and more preferably 45- 55%. A pitch differential reduction ratio is the ratio of the maximum pitch to the minimum pitch, and may comprise any suitable range, including but not limited to, optionally 0.05-0.8, preferably 0.2-0.7 and more preferably 0.45-0.55.

[0116] Figures 2A-2H are cross-section views of examples of cannulated threaded implants with different shaped threads, in which Figures 2A, C, E, and G show full length cannulated implants and Figures 2B, D, F and H show an expanded view of the cross-section of the thread shape. Non-limiting examples of suitable teeth cross-sectional (profde) shapes include trapezoid, triangular, rectangular or continuous sine peaks.

[0117] Figure 2A shows a full length cannulated implant 200A, while Figure 2B shows the cross-section of the thread shape for implant 200A, as thread cross-section 200B. Similarly, Figure 2C shows a full length cannulated implant 200C, while Figure 2D shows the crosssection of the thread shape for implant 200C, as thread cross-section 200D. Figure 2E shows a full length cannulated implant 200E, while Figure 2F shows the cross-section of the thread shape for implant 200E, as thread cross-section 200F. Figure 2G shows a full length cannulated implant 200G, while Figure 2H shows the cross-section of the thread shape for implant 200G, as thread cross-section 200H.

[0118] Figures 3 and 4 specify dimensions for an exemplary thread cross-section. Although the thread cross-section shown corresponds to thread cross-section 200D of Figure 2D, it is understood that the nomenclature and these dimensions may apply to any thread cross-section as described herein, including without limitation the thread cross-sections of Figures 2B, 2F and 2H.

[0119] Figure 3 is a cross-section view of an example of a thread shape 300, featuring a tip 301 , a tooth height 302, a base 303 , a tooth tip width 304, and a tooth base width 305. Tooth height 302 may comprise various suitable ranges of heights, including but not limited to optionally 0.2-1.5 mm, preferably 0.3-0.8 mm and more preferably 0.4-0.6 mm. Tooth base width 305 may comprise various suitable ranges of widths, including but not limited to optionally 0.3-2.0 mm, preferably 0.4-1.5 mm and more preferably 0.5-0.8 mm. Tooth tip width 304 may comprise various suitable ranges of widths, including but not limited to optionally 0.01-1.0 mm, preferably 0.03-0.5 mm and more preferably 0.05-0.15 mm.

[0120] Figures 4A and 4B are cross-sectional views of an example of a thread 400 featuring a tooth leading angle 401 , a tooth trailing angle 402, a tooth base leading radius 403 and a tooth trailing radius 404. Tooth leading angle 401 may comprise various suitable ranges of angles, including but not limited to optionally 5-60 degrees, preferably 10-45 degrees, more preferably 15-25 degrees. Tooth trailing angle 402 may comprise various suitable ranges of angles, including but not limited to optionally 1-30 degrees, preferably 3-20 degrees, more preferably 5-10 degrees. Optionally any of these ranges may be expressed as “above 0 degrees” at the bottom end of the range.

[0121] Tooth base leading radius 403 may comprise various suitable ranges of lengths, optionally 1-1.0 mm, preferably 0. 1-0.6 mm, more preferably 0.2-0.4 mm. Tooth base trailing radius 404 may comprise various suitable ranges of lengths, optionally 1-1.0 mm, preferably 0.1-0.6 mm, more preferably 0.2-0.4 mm. Optionally any of these ranges may be expressed as “longer than 0 mm” at the bottom end of the range.

[0122] The parameters of the thread geometry may impact the amount of friction that the thread generates with the bone as the implant is screwed into the bone. Conversely these same parameters impact the amount of compression those same threads can generate within the bone by creating a pitch differential. Generating compression without impeding compression requires a specific thread geometry. By selecting the various dimensions and angles as shown with regard to the thread cross-sectional views, the amount of friction and compression may be adjusted as needed.

[0123] Figures 5A-5F are cross-sectional views of examples of different shaped cannulas within the threaded implant. In these non-limiting examples, the threaded implant is shown as a schematic cylinder for the purpose of description only and without intending to be limited in any way. Non-limiting examples of the shapes of the cross-section of the cannula include regular hexagon, irregular hexagon, pentagram, pentagon, square, regular star, irregular star, circle, semicircle, oval, ellipse, symmetric lens, asymmetric lens, trefoil, quatrefoil, triangle, square, parallelogram, trapezoid, kite, rhombus, rectangle, tetrahedron, pentagon, hexagon, heptagon, octagon, nonagon, decagon, pentagram, hexagram, heptagram, oxagram, enneagram, decagram, regular polygon, irregular polygon, convex polygon, concave polygon, regular star polygon, irregular star polygon, or reuleaux polygon.

[0124] Figure 5A shows a cannula with a circular cross-section 500A. Figure 5B shows a cannula with a hexagonal cross-section 500B. Figure 5C shows a cannula with a square cross-section 500C. Figure 5D shows a cannula with an irregular hexagonal cross-section 500D. Figure 5E shows a cannula with a pentagon cross-section 500E. Figure 6 shows a cannula with a star cross-section 600.

[0125] Each of the geometries and / or values of the shape, size, and length of the cannula within the threaded implant are important. The threaded implant may be used over a guide wire, which requires a cannula sufficient to accommodate a guide wire. The threaded implant as described herein may feature a driver that extends deep into the cannula of the implant in order to provide mechanical support to the implant as it is inserted into the bone. The geometry of this driver cannula has to fit the driver and allow the transmission of torque to the threaded implant without stripping the hole. However, the driver still has to be able to be removed easily from the implant once implant has been implanted. Both these technical features are more challenging with biocomposite materials where the driver cannulas can strip more easily and where the friction between the driver and the implant may be high.

[0126] Figure 7 is a cross-section view of an example of a cannulated threaded implant. An implant 700 features a tapered cannula diameter 701 at a proximal end head 704. Implant 700 also features a tapered cannula angle 702 at proximal end head 704. Tapered cannula diameter 701 features an extent of tapering, which may be expressed as tapered cannula diameter change as a percentage of the cannula diameter at its largest extent. Such a percentage of tapering may comprise various suitable ranges of tapering, including but not limited to optionally 1-20 %, preferably 1-10% and more preferably 1-5%. Optionally any of these ranges may be expressed as “above 0%” at the bottom end of the range.

[0127] Optionally, a diameter of the cannula increases by between 0 and 20%, 0 and 10%, or 0 and 5% at the proximal end of the implant. Also optionally a diameter of the cannula increases by between 0 and 20%, 0 and 10%, or 0 and 5% at the tip of the proximal end of the implant.

[0128] Tapered cannula angle 702 features a change in the angle of such tapering, which may comprise various suitable ranges of tapering, including but not limited to optionally 1-15 degrees, preferably 1-10 degrees and more preferably 1-7 degrees. Optionally any of these ranges may be expressed as “above 0 degrees” at the bottom end of the range.

[0129] Further examples of tapering are shown with regard to Figures 8-10. Figure 8 shows a cross-section view of an example of a cannulated threaded implant 800. A proximal portion

[0130] 805 of the implant tapers, such that proximal portion 805 features a tapering diameter. A length 801 of proximal portion 805 is shown. A thread diameter 802 at a proximal end head

[0131] 806 of the implant 800 is also shown.

[0132] Figure 9 is a cross-section view of another example of a cannulated threaded implant 900 that also features a proximal portion 905 of the implant that tapers, such that proximal portion 905 features a tapering diameter. A length 901 of proximal portion 905 is shown. An angle change 902 of the core diameter at the proximal end head 906 of the implant 900 is also shown.

[0133] Figure 10 shows a cross-section view of an example of a cannulated threaded implant 1000 that features a distal portion 1005 of the implant that tapers, such that distal portion 1005 features a tapering diameter. A length 1001 of distal portion 1005 is shown. An angle change 902 of the core diameter at the distal end tip 1006 of the implant 1000 is also shown.

[0134] Figures 11 and 12 relate to cannulated threaded implants with differential thread pitch. Figure 11 is a cross-section view of an example of a cannulated threaded implant 1100, which features a distal portion 1105 with a constant thread pitch, and a proximal portion 1106 with a differential thread pitch unequal to the distal end thread pitch. A length 1101 of distal portion 1105 is shown. A length 1102 of proximal portion 1106 is shown.

[0135] Figure 12 is a cross-section view of an example of a cannulated threaded implant 1200, which features a distal portion 1205 with a constant thread pitch, and a proximal portion 1206 with a differential and variable thread pitch unequal to the distal end thread pitch. A length 1201 of distal portion 1205 is shown. A length 1202 of proximal portion 1206 is shown.

[0136] Figure 13 relates to a driver support length. Optionally, the driver can support the implant mechanically, especially as it relates to the torque generated by insertion of a threaded implant of the present invention.

[0137] Optionally, insertion of the driver along the entire length of the implant of the present invention as described herein allows visualization of the distal tip of the implant in the bone using intraoperative fluoroscopy or X-ray. For example, insertion of the driver along the entire length of the implant allows the tip of the driver to be aligned with the tip of the implant such that the tip of the driver, which can be seen under fluoroscopy, will show the user where the tip of the implant is. Optionally, the tip of the driver is less than 2 mm, less than 1 mm or less than 0.5mm from the tip of the implant.

[0138] Figure 13 shows a cross-section view of an example of a cannulated threaded implant 1300 showing a driver support length 1301. The absolute length of driver support length 1301 may be determined according to various suitable ranges of such lengths, including but not limited to optionally 2-100 mm, preferably 30-85 mm and more preferably 60-70 mm. Driver support length 1301 may also be expressed as a percentage of the overall length of implant 1300, according to various suitable ranges of such percentages, including but not limited to optionally 2-100%, preferably 50-100% and more preferably 80-100%. The clearance between driver support and the cannula of implant 1300 is preferably determined in millimetres, and is optionally 0.01-0.3 mm, preferably 0.03-0.15 mm and more preferably 0.05-0.1 mm. This clearance is the distance between wall of the driver and the wall of the cannula. Figures 14A and 14B relate to self-retaining features of the implant. An implant may or may not comprise a self-retaining feature. An implant 1400, as shown in Figures 14A and 14B, includes at least one self-retaining feature. Self retaining interference points may positioned at various points on a cannula 1405 of implant 1400, as internal protrusions within cannula 1405. A self-retaining feature length 1401 is shown. A self-retaining feature area 1403 is shown in Figure 14B. Within self-retaining feature area 1403, self-retaining spacing and quantity 1402 is shown.

[0139] Optionally such interference points may be present only at the head of the implant 1400, and / or spread along the length of cannula 1405, in equal / unequal spacings, and / or in symmetrical / unsymmetrical manner per cross section of the implant 1400.

[0140] Self-retaining feature length 1401 may be expressed as a percentage of a length of cannula 1405, in various suitable ranges, including but not limited to optionally 2-100%, preferably 10-50% and more preferably 15-25%. A self retaining feature may have a length in various suitable ranges, including but not limited to optionally 0.01-0.2 mm, preferably 0.02- 0.1 mm and more preferably 0.04-0.08 mm.

[0141] Figure 15 is a cross-section view of an example of a cannulated threaded implant showing different shaped internal protrusions as interference points. Self retaining interference points may be present 1 to 6 interference points per cross section of the implant. Various geometries of the internal protrusions are possible, including without limitation part of a sphere, tetrahedron, hexahedron, pentagonal pyramid or triangular prism. The edge size and / or radius of these various geometries may be present in various suitable ranges. For example, if the geometry is part of a sphere, the radius may optionally be in the range of 0.01-1.0 mm, preferably 0.05-0.7 mm and more preferably 0.1-0.5 mm. If the geometry is part of a tetrahedron, hexahedron, pentagonal pyramid or triangular prism, the edge size may optionally be in the range of 0.01-1.0 mm, preferably 0.02-0.5 mm and more preferably 0.03- 0.2 mm.

[0142] Figure 16 shows an exemplary threaded implant with a differential thread outer diameter for a portion of the implant. As shown, an implant 1600 features a first portion 1602, with threads of a constant diameter, and a second portion 1604, with threads in which the outer diameter changes along the length of that portion of implant 1600. Second portion 1604 features a length 1606 and a maximal thread outer diameter 1608. In this non-limiting example, the thread diameter increases along the length 1606 of second portion 1604. The thread outer diameter may be constant or differential throughout implant length, or along a portion thereof. The thread outer diameter change may be expressed as a percentage, and may be in a suitable range, including but not limited to optionally 0. 1-10%, preferably 0.5-7.5% and more preferably 1-5%. The thread outer diameter increase may start at a particular distance before the proximal end of the implant. The distance may be in a suitable range, including but not limited to optionally 1-100 mm, preferably 5-50 mm and more preferably 10-20 mm. Optionally the range of 1-100 mm may be expressed as “longer than 0 mm” at the bottom end of the range.

[0143] Figure 17 features an example of a threaded implant with a proximal core diameter change and a proximal core angle change. As shown, an implant 1700 features a first portion 1702 with a constant core diameter, and a second portion 1704 with a proximal conical core diameter change. Second portion 1704 has a length 1706, along which the proximal core diameter changes. Second portion 1704 also features a proximal conical core angle change 1708.

[0144] The core diameter at first portion 1702 may be implemented according to various suitable ranges, including but not limited to optionally 2.5-6.0 mm, preferably 3-4.5 mm and more preferably 3.5 -3.8 mm. The proximal conical core diameter change may be implemented according to various suitable ranges, including but not limited to optionally 0.05-1.5 mm, preferably 0.1-1 mm and more preferably 0.2-0.5 mm. The proximal conical core diameter change may be expressed as a percentage from the start of second portion 1704 to the end of second portion 1704, optionally 1-30%, preferably 2-20% and more preferably 3-15%. Proximal conical core angle change 1708 may be implemented according to various suitable ranges, including but not limited to optionally 1-10 degrees, preferably 0.5-7.5 degrees and more preferably 1-3 degrees. Optionally any of these ranges may be expressed as “above 0 degrees” at the bottom end of the range.

[0145] Figure 18 features an example of a threaded implant with a distal conical core diameter change and a distal conical core angle change. As shown, an implant 1800 features a first portion 1802 with a constant core diameter, and a second portion 1804 with a distal conical core diameter change. Second portion 1804 has a length 1806, along which the distal conical core diameter changes. Second portion 1804 also features a distal conical core angle change 1808.

[0146] The distal conical core diameter change may be implemented according to a variety of suitable ranges, including but not limited to optionally 0.05- 1.5 mm, preferably 0.1-1 mm and more preferably 0.4-0.7 mm. The distal conical core diameter change may also be expressed as a percentage from the start of second portion 1804 to the end of second portion 1804, optionally 1-0%, preferably 5-30% and more preferably 10-20%.

[0147] Distal conical core angle change 1808 may be implemented according to various suitable ranges, including but not limited to optionally 1-30 degrees, preferably 3-20 degrees and more preferably 5-10 degrees.

[0148] Implants of the present invention can either be manufactured with the conical distal end or the conical distal end can be created by sharpening the distal end following manufacture or following trimming. Preferably, the implant may be adapted or trimmed to multiple different lengths without sacrificing functionality. For example and without limitation, preferably the implant maintains performance integrity after trimming to a minimum length of 20 mm, 15 mm, or 10 mm.

[0149] For example, optionally the distal tip of the threaded implant is trimmed. The distal tip may be further sharpened to result in a conical tip to the threaded implant that facilitates easy insertion. Optionally there is an angle change in the distal end of the implant and trimming is done distal to the angle change. Also optionally, the shaft is adjustable by being trimmable or sharpened, or both. Preferably, the implant maintains performance integrity post trimming to a minimum length of optionally 20 mm, preferably 15 mm and more preferably 10 mm. Preferably, the implant supports pre-insertion shaping, such as sharpening for example, according to indication requirements, including but not limited to: tip conical sharpening, with an angle ranging from optionally 0.1-30 degrees, preferably 1-20 degrees and more preferably 3-10 degrees; beveled tip and / or head cutting; V-shape cutting; fork shape cutting and / or flat surface cross-section.

[0150] Implant and Driver System

[0151] The present invention, in at least some aspects, relates to a comprehensive system for bone fixation procedures that includes fiber-reinforced fully threaded implants and associated surgical instruments. The system encompasses cannulated threaded implants constructed from bioabsorbable composite materials, adjustable length drivers for implant insertion, and specialized sharpening tools for implant preparation. These components work together to provide surgeons with a complete solution for various bone fixation applications.

[0152] The fiber-reinforced fully threaded implants represent a departure from conventional bone fixation devices by incorporating bioabsorbable mineral fibers within a polymer matrix. This composite construction may provide enhanced mechanical properties while maintaining biocompatibility and resorbability characteristics. The implants feature continuous threading along their length, with differential pitch configurations that may enable compression forces to be applied across bone segments during insertion. The cannulated design allows the implants to be inserted over guide wires, facilitating precise placement in surgical procedures.

[0153] The adjustable length drivers form an integral part of the surgical instrument system, providing surgeons with the ability to modify driver length according to specific procedural requirements. These drivers may accommodate various implant sizes and surgical approaches through their adjustable mechanisms. The drivers may include features such as length indicators, locking mechanisms, and torque transmission systems that facilitate controlled implant insertion. In some cases, the drivers may be configured with cannulated designs to accommodate guide wire placement during surgical procedures.

[0154] The implant sharpening tools complete the surgical system by enabling surgeons to modify implant tip geometry according to specific anatomical requirements. These tools may allow for customization of implant insertion characteristics through controlled sharpening of the distal tip. The sharpening capability may be particularly beneficial when implants are trimmed to specific lengths during surgical procedures, as the tools can restore optimal tip geometry for insertion. The sharpening tools may incorporate various cutting elements and cavity designs to accommodate different implant sizes and desired tip configurations.

[0155] The integrated nature of this system may provide surgeons with flexibility in addressing diverse bone fixation challenges. The combination of bioabsorbable implants, adjustable drivers, and sharpening tools may enable customized approaches to individual patient anatomy and surgical requirements. The system components may be designed to work together seamlessly, with compatible interfaces and complementary functionality that supports efficient surgical workflows.

[0156] Turning now to the drawings and referring to Figure 19A, a driver 1900 may be provided as part of the surgical instrument system for inserting the fiber-reinforced fully threaded implants. The driver 1900 may include a shaft 1902 that extends longitudinally and may be configured to engage with the cannulated implants during insertion procedures. A sleeve 1904 may be positioned around at least a portion of the shaft 1902 and may provide structural support and guidance for the shaft 1902 during operation. The driver 1900 may further include a handle 1906 that may be positioned at a proximal end of the driver 1900 to facilitate manual manipulation and control by surgical personnel. A length adjustment actuation 1908 may be incorporated into the driver 1900 to enable modification of the operational length of the shaft 1902 according to specific procedural requirements. Additionally, a length indicator 1910 may be provided on the driver 1900 to provide visual feedback regarding the current operational configuration of the shaft 1902.

[0157] The driver 1900 may be configured as either a cannulated or non-cannulated device, providing flexibility for different surgical procedures. In some cases where the driver 1900 is cannulated, the internal channel may accommodate guide wires or other surgical instruments during implant insertion procedures. In some cases where the driver 1900 is non-cannulated, the driver 1900 may provide a solid construction that may offer enhanced structural rigidity for certain applications. The shaft 1902 may be constructed to transmit rotational forces from the handle 1906 to the implant, enabling controlled insertion and positioning of the threaded implants within bone tissue. The sleeve 1904 may provide additional mechanical support to the shaft 1902 and may help maintain proper alignment during insertion procedures.

[0158] With continued reference to Figure 19A, the length adjustment actuation 1908 may enable surgeons to modify the effective length of the shaft 1902 to accommodate different implant sizes and surgical approaches. The length adjustment actuation 1908 may incorporate various mechanical mechanisms that allow for controlled extension and retraction of the shaft 1902 relative to the sleeve 1904. Length adjustment actuation 1908 is shown as a ring in this non-limiting example; the user would press in the ring, which would enable the user to then move shaft 1902 in and out to adjust length. Shaft 1902 may go over a wire (not shown). The length indicator 1910 may provide visual markings or other indicia that communicate the current operational length of the shaft 1902 to the surgical team. In some cases, the length indicator 1910 may include graduated markings that correspond to specific shaft 1902 extension lengths, enabling precise adjustment of the driver 1900 configuration.

[0159] Sleeve 1904 preferably has a suitable length to operate as a spacer, so that the user is able to see the location of the implant (not shown). For example, in surgery, tissue, fat, skin, and other material may block the view of the user if sleeve 1904 is too short. Driver 1900 needs to be long enough to enter into the bone, further increasing the need for a sufficiently long sleeve. The length of sleeve 1904 may be fixed.

[0160] Referring to Figure 19B, the driver 1900 may be characterized by various dimensional parameters that define the operational characteristics of the device. A shaft operational length 1950 may represent the effective working length of the shaft 1902 when extended for use with implants of specific dimensions. A shaft diameter 1952 may define the cross-sectional dimension of the shaft 1902 and may be selected to provide appropriate mechanical strength while maintaining compatibility with the cannulated implants. The sleeve 1904 may be characterized by a sleeve length 1954 that may extend along a portion of the shaft 1902 to provide structural support and guidance. A sleeve diameter 1956 may define the external dimension of the sleeve 1904 and may be configured to accommodate the shaft 1902 while providing clearance for operational movement.

[0161] The driver 1900 may have an overall length 1958 that encompasses the complete assembly including the handle 1906, sleeve 1904, and extended shaft 1902. In some cases where the driver 1900 is configured as a cannulated device, a cannulation diameter 1960 may define the internal channel dimension that accommodates guide wires or other surgical instruments. The driver 1900 components may be constructed from metal, polymer, or a combination of both materials to achieve desired mechanical properties and biocompatibility characteristics. In some cases, metal components may provide enhanced strength and durability, while polymer components may offer reduced weight and improved ergonomic characteristics. The combination of different materials may enable optimization of specific performance characteristics while maintaining overall functionality of the driver 1900 system.

[0162] Cannulation diameter 1960 is preferably of a suitable size so that driver 1900 may be inserted over a wire, such as a K wire for example. The length of K wire is longer than that of the implant; cannulation diameter 1960 provides sufficient additional space for the K wire (not shown). However, if driver 1900 is non-cannulated, then a K wire may not be used. Such a situation may arise due to the presence of nerves and other surgical contraindications for K wires.

[0163] Figures 19C and 19D show overall closed and open lengths for the driver, respectively. The minimal operational length 1984 may be achieved when the shaft 1902 is retracted to the shortest position relative to the sleeve 1904, providing a compact configuration that may be suitable for procedures requiring reduced driver 1900 extension. In some cases, the minimal operational length 1984 may be selected to accommodate shorter implants or surgical approaches where space constraints limit the available working distance. The maximal operational length 1986 may be achieved when the shaft 1902 is extended to the furthest position relative to the sleeve 1904, providing maximum reach for procedures requiring greater driver 1900 extension. In some cases, the maximal operational length 1986 may be selected to accommodate longer implants or surgical approaches where increased working distance may be beneficial for surgical access and visualization.

[0164] The overall open length of the driver may be implemented according to a variety of suitable ranges, including but not limited to optionally 100-400 mm, preferably 150-300 mm and more preferably 200-275 mm. The overall closed length of the driver may be implemented according to a variety of suitable ranges, including but not limited to optionally 50-350 mm, preferably 75-250 mm and more preferably 100-200 mm. The weight of the driver may be implemented according to a variety of suitable ranges, including but not limited to optionally 15-1000 grams, preferably 50-500 grams and more preferably 100-300 grams.

[0165] Referring to Figures 19E and 19F, the driver 1900 may be configured to operate across a range of adjustable operational lengths to accommodate different surgical requirements and implant dimensions. The driver 1900 may be adjusted between different operational configurations while maintaining structural integrity and functional performance throughout the adjustment range. Figure 19E illustrates a minimal operational length 1984 that may represent the shortest functional configuration of the driver 1900, while Figure 19F depicts a maximal operational length 1986 that may represent the fully extended operational configuration of the driver 1900.

[0166] The overall shaft adjustment length of the driver may be implemented according to a variety of suitable ranges, including but not limited to optionally 10-150 mm, preferably 30- 120 mm and more preferably 40-80 mm. The overall shaft minimal operational length of the driver may be implemented according to a variety of suitable ranges, including but not limited to optionally 1-50 mm, preferably 5-35 mm and more preferably 10-20 mm. The overall shaft maximal operational length of the driver may be implemented according to a variety of suitable ranges, including but not limited to optionally 10-200 mm, preferably 30- 175 mm and more preferably 50-100 mm. The overall sleeve length of the driver may be implemented according to a variety of suitable ranges, including but not limited to optionally 3-100 mm, preferably 15-75 mm and more preferably 30-60 mm.

[0167] With continued reference to Figures 19E and 19F, the length adjustment mechanism incorporated within the driver 1900 may enable controlled transition between the minimal operational length 1984 and the maximal operational length 1986 (note that the sleeve length 1987 is also shown). The length adjustment mechanism may be actuated by one or two hands depending on the specific design configuration and surgical requirements. In some cases, single-handed operation may provide convenience and efficiency during surgical procedures, while two-handed operation may offer enhanced control and precision during length adjustment. The length adjustment mechanism may be implemented by moving the shaft 1902 relative to the sleeve 1904, or alternatively by moving the sleeve 1904 relative to the shaft 1902, depending on the specific mechanical configuration of the driver 1900 assembly. The driver 1900 may incorporate a fixed sleeve 1904 configuration with a moving shaft 1902, where the shaft 1902 may be extended or retracted while the sleeve 1904 remains stationary relative to the handle 1906. In some cases, the driver 1900 may incorporate a fixed shaft 1902 configuration with a moving sleeve 1904, where the sleeve 1904 may be adjusted along the shaft 1902 while the shaft 1902 remains stationary relative to the handle 1906. The length adjustment actuation 1908 may facilitate controlled movement between these operational configurations, enabling surgeons to select the appropriate operational length for specific procedural requirements. The length indicator 1910 may provide visual feedback regarding the current operational configuration, allowing surgical personnel to verify that the driver 1900 has been adjusted to the desired operational length between the minimal operational length 1984 and the maximal operational length 1986.

[0168] For the adjustable driver, the driver shaft outer shape may optionally be configured as described herein, including but not limited to any of regular hexagon, irregular hexagon, pentagram, pentagon, square, regular star (torx), irregular star (torx). The driver shaft may optionally be configured as described herein, including but not limited to any of circular, regular hexagon, irregular hexagon, pentagram, pentagon, square, regular star (torx), irregular star (torx).

[0169] For the adjustable driver, the driver sleeve outer shape may optionally be configured as described herein, including but not limited to any of circular, regular hexagon, irregular hexagon, pentagram, pentagon, square, regular star (torx), irregular star (torx). The sleeve cannulation shape may optionally be configured as described herein, including but not limited to any of circular, regular hexagon, irregular hexagon, pentagram, pentagon, square, regular star (torx), irregular star (torx).

[0170] Referring to Figure 20A, the shaft 1902 may be constructed with specific geometric configurations that define the structural and functional characteristics of the driver 1900 system. The shaft 1902 may include a shaft 2000 that forms the primary structural element for transmitting rotational forces during implant insertion procedures. The shaft 2000 may be configured with various cross-sectional geometries to accommodate different torque transmission requirements and compatibility with cannulated implants. The shaft 2000 may incorporate dimensional specifications that balance mechanical strength with operational flexibility, enabling effective engagement with threaded implants while maintaining structural integrity during surgical procedures.

[0171] The shaft 2000 may include a shaft interior 2002 that extends longitudinally through the shaft 2000 to provide cannulation capability for guide wire accommodation or other surgical instruments. In some cases where the driver 1900 is configured as a cannulated device, the shaft interior 2002 may provide a continuous channel that allows passage of guide wires during implant insertion procedures. The shaft interior 2002 may be dimensioned to accommodate standard guide wire sizes while maintaining adequate wall thickness for structural support. The shaft interior 2002 may be configured with various cross-sectional shapes to optimize functionality and compatibility with different surgical instruments and procedural requirements.

[0172] With continued reference to Figure 20A, the shaft 2000 may be characterized by a shaft minimal wall thickness 2004 that defines the structural dimension between the external surface of the shaft 2000 and the shaft interior 2002. The shaft minimal wall thickness 2004 may be selected to provide adequate mechanical strength for torque transmission while maintaining compatibility with the overall dimensional requirements of the driver 1900 system. The shaft minimal wall thickness 2004 may for example at least 0.5 mm, preferably between 0.3-2 mm, more preferably between 0.4-1 mm, and most preferably between 0.5-0.8 mm. In some cases, the shaft minimal wall thickness 2004 may be optimized to balance structural integrity with weight considerations, enabling effective surgical manipulation while providing durability during repeated use. The shaft minimal wall thickness 2004 may vary along the length of the shaft 2000 to accommodate different loading conditions and functional requirements at various positions along the shaft 2000.

[0173] The shaft 2000 may be configured with various outer shape geometries that define the external cross-sectional profile of the shaft 2000. In some cases, the shaft 2000 may be configured with a regular hexagon outer shape that provides defined engagement surfaces for torque transmission and rotational control. The shaft 2000 may alternatively be configured with an irregular hexagon outer shape that may provide customized engagement characteristics for specific applications. In some cases, the shaft 2000 may incorporate a pentagram outer shape, a pentagon outer shape, or a square outer shape, each providing different torque transmission characteristics and compatibility with various driver 1900 configurations. The shaft 2000 may also be configured with a regular star outer shape or an irregular star outer shape, which may provide enhanced grip characteristics and torque transmission capabilities for demanding surgical applications.

[0174] The shaft 2000 may be characterized by a shaft incircle diameter 2006 that defines the diameter of the largest circle that may be inscribed within the cross-sectional geometry of the shaft 2000. The shaft incircle diameter 2006 may provide a reference dimension for determining compatibility with mating components and for establishing clearance requirements within the driver 1900 system. In some cases, the shaft incircle diameter 2006 may be selected to ensure adequate structural strength while maintaining compatibility with the sleeve 1904 and other driver 1900 components. The shaft incircle diameter 2006 may be optimized to provide effective torque transmission characteristics while accommodating the dimensional requirements of the shaft interior 2002 and the shaft minimal wall thickness 2004.

[0175] As further shown in Figure 20A, the shaft 2000 may include shaft comer radii 2008 that define the transition geometry at the vertices or comers of the shaft 2000 cross-sectional profile. The shaft comer radii 2008 may provide smooth transitions between adjacent surfaces of the shaft 2000, reducing stress concentrations and improving the durability of the shaft 2000 during operational loading. In some cases, the shaft comer radii 2008 may be selected to optimize manufacturing processes while maintaining the functional characteristics of the shaft 2000. The shaft comer radii 2008 may vary depending on the specific outer shape geometry of the shaft 2000, with different radius values being appropriate for different cross- sectional configurations such as hexagonal, pentagonal, or star-shaped profiles.

[0176] The shaft 2000 may be further characterized by a shaft circumcircle diameter 2010 that defines the diameter of the smallest circle that may circumscribe the cross-sectional geometry of the shaft 2000. The shaft circumcircle diameter 2010 may provide a reference dimension for determining clearance requirements with surrounding components such as the sleeve 1904 and for establishing overall dimensional compatibility within the driver 1900 system. In some cases, the shaft circumcircle diameter 2010 may be selected to ensure proper fit and operational clearance while maintaining effective torque transmission capabilities. The relationship between the shaft incircle diameter 2006 and the shaft circumcircle diameter 2010 may define the geometric characteristics of the shaft 2000 cross-sectional profile and may influence the torque transmission efficiency and engagement characteristics of the driver 1900.

[0177] The shaft interior 2002 may be configured with various cannulation shape geometries that define the internal cross-sectional profile of the shaft 2000. In some cases, the shaft interior 2002 may be configured with a circular cannulation shape that provides uniform clearance for guide wires and other cylindrical surgical instruments. The shaft interior 2002 may alternatively be configured with a regular hexagon cannulation shape, an irregular hexagon cannulation shape, or other polygonal configurations that may provide specific engagement characteristics with surgical instruments or guide systems. In some cases, the shaft interior 2002 may incorporate a pentagram cannulation shape, a pentagon cannulation shape, or a square cannulation shape, each providing different functional characteristics for specific surgical applications. The shaft interior 2002 may also be configured with a regular star cannulation shape or an irregular star cannulation shape, which may provide enhanced engagement capabilities with specialized surgical instruments or guide wire systems that incorporate corresponding geometric features.

[0178] The shaft comer radii of the driver may be implemented according to a variety of suitable ranges, including but not limited to optionally 0.01-0.85 mm, preferably 0.05-0.5 mm and more preferably 0. 1-0.3 mm. The shaft incircle diameter of the driver may be implemented according to a variety of suitable ranges, including but not limited to optionally 1.0-5.0 mm, preferably 1.5-3.5 mm and more preferably 2.0-3.0 mm. The shaft circumcircle diameter of the driver may be implemented according to a variety of suitable ranges, including but not limited to optionally 1.0-6.0 mm, preferably 1.6-4.0 mm and more preferably 2.0-3.5 mm. The shaft minimal wall thickness of the driver may be implemented according to a variety of suitable ranges, including but not limited to optionally 0. 1-2.5 mm, preferably 0.2-1.0 mm and more preferably 0.3-0.5 mm. The shaft cannulation incircle diameter of the driver may be implemented according to a variety of suitable ranges, including but not limited to optionally 0.2-3.0 mm, preferably 0.5-2.5 mm and more preferably 1.0-2.0 mm. The shaft cannulation circumcircle diameter of the driver may be implemented according to a variety of suitable ranges, including but not limited to optionally 0.3-3.5 mm, preferably 0.7-3.0 mm and more preferably 1.2-2.5 mm.

[0179] Referring to Figures 20B and 20C, the driver 1900 may incorporate a sleeve 2050 that provides structural support and guidance functionality for the shaft 1902 during surgical procedures. The sleeve 2050 may be constructed with specific geometric configurations that define the operational characteristics and compatibility requirements of the driver 1900 system. The sleeve 2050 may be positioned around at least a portion of the shaft 1902 and may provide mechanical support during implant insertion procedures. In some cases, the sleeve 2050 may be configured to accommodate various shaft 1902 geometries while maintaining proper alignment and clearance for operational movement. The sleeve 2050 may incorporate dimensional specifications that balance structural integrity with functional flexibility, enabling effective support of the shaft 1902 while accommodating the length adjustment mechanisms incorporated within the driver 1900.

[0180] The sleeve 2050 may include a sleeve cannulation 2052 that extends longitudinally through the sleeve 2050 to accommodate the shaft 1902 and provide clearance for operational movement during length adjustment procedures. The sleeve cannulation 2052 may be dimensioned to provide appropriate clearance for the shaft 1902 while maintaining structural support and guidance functionality. In some cases, the sleeve cannulation 2052 may be configured with specific geometric profiles that correspond to the cross-sectional geometry of the shaft 1902, enabling effective engagement and torque transmission between the sleeve 2050 and shaft 1902 components. The sleeve cannulation 2052 may be optimized to accommodate the range of operational positions required for the length adjustment mechanism while maintaining consistent performance characteristics throughout the adjustment range.

[0181] With continued reference to Figures 20B and 20C, the sleeve cannulation 2052 may be characterized by a sleeve cannulation incircle diameter 2054 that defines the diameter of the largest circle that may be inscribed within the cross-sectional geometry of the sleeve cannulation 2052. The sleeve cannulation incircle diameter 2054 may provide a reference dimension for determining clearance requirements with the shaft 1902 and for establishing compatibility between the sleeve 2050 and shaft 1902 components. In some cases, the sleeve cannulation incircle diameter 2054 may be selected to ensure adequate clearance for shaft 1902 movement while maintaining effective guidance and support functionality. The sleeve cannulation incircle diameter 2054 may be optimized to accommodate the shaft circumcircle diameter 2010 while providing appropriate operational clearance for length adjustment and rotational movement of the shaft 1902 within the sleeve cannulation 2052.

[0182] The sleeve cannulation 2052 may be further characterized by a sleeve cannulation circumcircle diameter 2056 that defines the diameter of the smallest circle that may circumscribe the cross-sectional geometry of the sleeve cannulation 2052. The sleeve cannulation circumcircle diameter 2056 may provide a reference dimension for determining the maximum clearance envelope within the sleeve cannulation 2052 and for establishing dimensional compatibility with various shaft 1902 configurations. In some cases, the sleeve cannulation circumcircle diameter 2056 may be selected to accommodate the shaft incircle diameter 2006 while maintaining structural integrity of the sleeve 2050. The relationship between the sleeve cannulation incircle diameter 2054 and the sleeve cannulation circumcircle diameter 2056 may define the geometric characteristics of the sleeve cannulation 2052 cross-sectional profile and may influence the clearance and engagement characteristics between the sleeve 2050 and shaft 1902 components.

[0183] As further shown in Figures 20B and 20C, the sleeve 2050 may include sleeve comer radii 2058 that define the transition geometry at the vertices or comers of the sleeve cannulation 2052 cross-sectional profile. The sleeve comer radii 2058 may provide smooth transitions between adjacent surfaces of the sleeve cannulation 2052, reducing stress concentrations and improving the durability of the sleeve 2050 during operational loading. In some cases, the sleeve comer radii 2058 may be selected to optimize manufacturing processes while maintaining the functional characteristics of the sleeve cannulation 2052. The sleeve comer radii 2058 may vary depending on the specific cannulation shape geometry of the sleeve cannulation 2052, with different radius values being appropriate for different cross- sectional configurations such as hexagonal, pentagonal, or star-shaped profiles. The sleeve comer radii 2058 may be coordinated with the shaft comer radii 2008 to ensure compatible engagement and smooth operational movement between the sleeve 2050 and shaft 1902 components.

[0184] The sleeve cannulation 2052 may be configured with various cannulation shape geometries that define the internal cross-sectional profile of the sleeve 2050. In some cases, the sleeve cannulation 2052 may be configured with a circular cannulation shape that provides uniform clearance for cylindrical shaft 1902 configurations and enables smooth rotational movement during operational procedures. The sleeve cannulation 2052 may alternatively be configured with a regular hexagon cannulation shape that provides defined engagement surfaces for hexagonal shaft 1902 profiles, enabling controlled torque transmission and rotational positioning. In some cases, the sleeve cannulation 2052 may incorporate an irregular hexagon cannulation shape that may provide customized engagement characteristics for specific shaft 1902 configurations and operational requirements.

[0185] The sleeve cannulation 2052 may be configured with a pentagram cannulation shape, a pentagon cannulation shape, or a square cannulation shape, each providing different engagement characteristics and compatibility with corresponding shaft 1902 cross-sectional geometries. In some cases, the sleeve cannulation 2052 may incorporate a regular star cannulation shape that provides enhanced engagement capabilities with star-shaped shaft 1902 profiles, enabling effective torque transmission and rotational control during surgical procedures. The sleeve cannulation 2052 may also be configured with an irregular star cannulation shape that may provide specialized engagement characteristics for customized shaft 1902 configurations and specific operational requirements. The selection of the sleeve cannulation 2052 shape may be coordinated with the shaft 1902 outer shape geometry to ensure compatible engagement and effective torque transmission between the sleeve 2050 and shaft 1902 components.

[0186] The sleeve 2050 may be characterized by a sleeve incircle diameter 2060 that defines the diameter of the largest circle that may be inscribed within the external cross-sectional geometry of the sleeve 2050. The sleeve incircle diameter 2060 may provide a reference dimension for determining compatibility with surrounding components and for establishing clearance requirements within the driver 1900 system. In some cases, the sleeve incircle diameter 2060 may be selected to ensure adequate structural strength while maintaining compatibility with the handle 1906 and other driver 1900 components. The sleeve incircle diameter 2060 may be optimized to provide effective structural support for the sleeve cannulation 2052 while accommodating the dimensional requirements of the length adjustment actuation 1908 and other operational mechanisms incorporated within the driver 1900 system.

[0187] The sleeve 2050 may be further characterized by a sleeve circumcircle diameter 2062 that defines the diameter of the smallest circle that may circumscribe the external cross- sectional geometry of the sleeve 2050. The sleeve circumcircle diameter 2062 may provide a reference dimension for determining overall dimensional compatibility within the driver 1900 system and for establishing clearance requirements with surrounding components such as the handle 1906 and length adjustment mechanisms. In some cases, the sleeve circumcircle diameter 2062 may be selected to ensure proper fit and operational clearance while maintaining effective structural support capabilities. The relationship between the sleeve incircle diameter 2060 and the sleeve circumcircle diameter 2062 may define the geometric characteristics of the sleeve 2050 external cross-sectional profile and may influence the structural integrity and compatibility characteristics of the sleeve 2050 within the driver 1900 system.

[0188] The sleeve 2050 may include sleeve comer radii 2064 that define the transition geometry at the vertices or comers of the sleeve 2050 external cross-sectional profile. The sleeve comer radii 2064 may provide smooth transitions between adjacent surfaces of the sleeve 2050 external geometry, reducing stress concentrations and improving the durability of the sleeve 2050 during operational loading and handling. In some cases, the sleeve comer radii 2064 may be selected to optimize manufacturing processes while maintaining the structural characteristics of the sleeve 2050. The sleeve comer radii 2064 may vary depending on the specific outer shape geometry of the sleeve 2050, with different radius values being appropriate for different external cross-sectional configurations. The sleeve comer radii 2064 may be coordinated with other geometric features of the sleeve 2050 to ensure consistent performance characteristics and compatibility with the driver 1900 system components. The sleeve 2050 may be configured with various outer shape geometries that define the external cross-sectional profile of the sleeve 2050. In some cases, the sleeve 2050 may be configured with a circular outer shape that provides uniform external geometry and enables smooth integration with cylindrical handle 1906 configurations and other driver 1900 components. The sleeve 2050 may alternatively be configured with a regular hexagon outer shape that provides defined external surfaces for enhanced grip characteristics and compatibility with hexagonal interface requirements. In some cases, the sleeve 2050 may incorporate an irregular hexagon outer shape that may provide customized external characteristics for specific ergonomic or functional requirements within the driver 1900 system.

[0189] The sleeve 2050 may be configured with a pentagram outer shape, a pentagon outer shape, or a square outer shape, each providing different external characteristics and compatibility with various driver 1900 configurations and operational requirements. In some cases, the sleeve 2050 may incorporate a regular star outer shape that provides enhanced grip characteristics and distinctive external geometry for identification and handling purposes during surgical procedures. The sleeve 2050 may also be configured with an irregular star outer shape that may provide specialized external characteristics for customized driver 1900 configurations and specific operational requirements. The selection of the sleeve 2050 outer shape may be coordinated with the overall design requirements of the driver 1900 system to ensure compatible integration and effective operational performance.

[0190] The sleeve incircle diameter of the driver may be implemented according to a variety of suitable ranges, including but not limited to optionally 1.3-7.0 mm, preferably 1.8-5.0 mm and more preferably 2. 1-4.5 mm. The sleeve circumcircle diameter of the driver may be implemented according to a variety of suitable ranges, including but not limited to optionally 1.4-8.0 mm, preferably 1.9-6.0 mm and more preferably 2.2-5.5 mm. The sleeve cannulation incircle diameter of the driver may be implemented according to a variety of suitable ranges, including but not limited to optionally 1.1-6.5 mm, preferably 1.6-4.5 mm and more preferably 1.9-4.0 mm. The sleeve cannulation circumcircle diameter of the driver may be implemented according to a variety of suitable ranges, including but not limited to optionally 1.3-7.5 mm, preferably 1.8-5.5 mm and more preferably 2.1-5.0 mm. The sleeve comer radii of the driver may be implemented according to a variety of suitable ranges, including but not limited to optionally 0.01-0.85 mm, preferably 0.05-0.5 mm and more preferably 0.1-0.3 mm The sleeve cannulation comer radii of the driver may be implemented according to a variety of suitable ranges, including but not limited to optionally 0.01-1.5 mm, preferably 0.05-0.1 mm and more preferably 0.1-0.75 mm.

[0191] Referring to Figure 21, an operational shaft 2100 may be provided as part of the driver 1900 system to facilitate controlled implant insertion procedures. The operational shaft 2100 may extend longitudinally and may be configured to engage with cannulated implants during surgical procedures. The operational shaft 2100 may incorporate structural features that enable effective torque transmission while maintaining compatibility with the length adjustment mechanisms of the driver 1900 system. In some cases, the operational shaft 2100 may be constructed from materials that provide adequate mechanical strength for surgical applications while maintaining appropriate flexibility for operational adjustments. The operational shaft 2100 may be dimensioned to accommodate various implant sizes and surgical approaches through the adjustable length capabilities of the driver 1900 system.

[0192] A length indicator 2100A may be integrated with the operational shaft 2100 to provide visual feedback regarding the current operational configuration of the driver 1900 system. The length indicator 2100A may be positioned along the surface of the operational shaft 2100 and may include markings or other visual elements that communicate the active shaft portion to surgical personnel. In some cases, the length indicator 2100A may include graduated markings that correspond to specific operational shaft 2100 extension lengths, enabling precise adjustment and verification of the driver 1900 configuration. The length indicator 2100A may be configured to remain visible during operational procedures, allowing surgical teams to monitor and verify the current shaft 1902 extension without interrupting surgical workflows. The length indicator 2100A may incorporate contrasting colors or other visual enhancement features that improve readability under various lighting conditions encountered in surgical environments.

[0193] With continued reference to Figure 21, the length indicator 2100A may be positioned to provide clear visual access during driver 1900 operation while maintaining structural integrity of the operational shaft 2100. The length indicator 2100A may be applied to the operational shaft 2100 through various manufacturing processes such as laser etching, printing, or mechanical engraving to ensure durability and longevity during repeated use. In some cases, the length indicator 2100A may be configured as raised or recessed features on the operational shaft 2100 surface, providing tactile feedback in addition to visual indication. The length indicator 2100A may be coordinated with the length adjustment actuation 1908 to ensure that the visual markings correspond accurately to the actual operational shaft 2100 extension and the effective working length of the driver 1900 system. The length indicator 2100A may provide reference points that correspond to common implant lengths or surgical approach requirements, enabling surgeons to quickly select appropriate operational shaft 2100 configurations for specific procedures. In some cases, the length indicator 2100A may include numerical markings that indicate the active shaft portion in standard measurement units such as millimeters or inches. The length indicator 2100A may also incorporate color-coded zones or other visual coding systems that provide rapid identification of operational shaft 2100 configurations suitable for different types of surgical procedures or implant dimensions. The positioning and design of the length indicator 2100A may be optimized to maintain visibility throughout the range of operational shaft 2100 positions, ensuring that surgical personnel can access length information regardless of the current driver 1900 configuration.

[0194] Referring to Figure 22, the driver 1900 may incorporate various locking mechanisms that enable secure positioning and controlled adjustment of the shaft 1902 during surgical procedures. A lock 2200 may be provided as part of the driver 1900 system to facilitate selective engagement and disengagement of the shaft 1902 at specific operational positions. The lock 2200 may be configured to maintain the shaft 1902 in a fixed position relative to the sleeve 1904 during implant insertion procedures, preventing unintended movement or adjustment that could compromise surgical precision. In some cases, the lock 2200 may be designed to withstand the operational forces encountered during surgical procedures while providing reliable engagement and release functionality. The lock 2200 may incorporate various mechanical elements that work together to provide controlled locking and unlocking of the shaft 1902 position within the driver 1900 system.

[0195] A lock release knob 2202 may be incorporated into the lock 2200 system to provide manual actuation capability for surgical personnel. The lock release knob 2202 may be positioned to enable convenient access during surgical procedures while maintaining ergonomic compatibility with the overall driver 1900 configuration. In some cases, the lock release knob 2202 may be configured for single-handed operation, allowing surgeons to adjust the shaft 1902 position while maintaining control of other surgical instruments or maintaining sterile technique requirements. The lock release knob 2202 may alternatively be configured for two-handed operation in applications where enhanced control and precision may be beneficial for specific surgical procedures or when working with particularly demanding operational requirements. The lock release knob 2202 may be constructed from materials that provide adequate grip characteristics and durability for repeated use in surgical environments. With continued reference to Figure 22, a mechanism housing 2204 may be provided to contain and support the internal components of the lock 2200 system. The mechanism housing 2204 may be configured to protect the internal locking elements from environmental contamination while maintaining operational accessibility through the lock release knob 2202. In some cases, the mechanism housing 2204 may be constructed from materials that provide structural integrity and biocompatibility characteristics suitable for surgical applications. The mechanism housing 2204 may be dimensioned to accommodate the various internal components of the lock 2200 while maintaining compatibility with the overall dimensional requirements of the driver 1900 system. The mechanism housing 2204 may incorporate sealing features or other protective elements that prevent ingress of fluids or debris that could compromise the operational performance of the lock 2200 system.

[0196] A spring 2206 may be positioned within the mechanism housing 2204 to provide biasing force for the lock 2200 engagement mechanism. The spring 2206 may be configured to maintain consistent engagement force between the locking components while accommodating the operational movement required for lock 2200 actuation. In some cases, the spring 2206 may be selected to provide appropriate force characteristics that balance reliable engagement with manageable actuation requirements for surgical personnel. The spring 2206 may be constructed from materials that provide durability and consistent performance characteristics throughout repeated operational cycles. The spring 2206 may be dimensioned and positioned within the mechanism housing 2204 to provide optimal force distribution and engagement characteristics for the lock 2200 system while maintaining compatibility with the other internal components.

[0197] As further shown in Figure 22, a locking ball 2208 may be incorporated into the lock 2200 system to provide mechanical engagement between the shaft 1902 and the locking mechanism components. The locking ball 2208 may be positioned to engage with corresponding features on the shaft 1902 when the lock 2200 is in the engaged position, preventing relative movement between the shaft 1902 and sleeve 1904. In some cases, the locking ball 2208 may be constructed from materials that provide wear resistance and durability characteristics suitable for repeated engagement and disengagement cycles. The locking ball 2208 may be dimensioned to provide adequate engagement force while maintaining smooth operation during lock 2200 actuation procedures. The locking ball 2208 may be biased by the spring 2206 to maintain consistent engagement pressure and reliable locking performance throughout the operational range of the driver 1900 system. Shaft grooves 2210 may be provided on the shaft 1902 to accommodate engagement with the locking ball 2208 and provide discrete positioning locations for the lock 2200 system. The shaft grooves 2210 may be positioned at specific intervals along the shaft 1902 to correspond with desired operational length settings for the driver 1900. In some cases, the shaft grooves 2210 may be configured with geometric profiles that provide secure engagement with the locking ball 2208 while enabling smooth transition during lock 2200 actuation. The shaft grooves 2210 may be dimensioned to accommodate the locking ball 2208 while maintaining structural integrity of the shaft 1902 under operational loading conditions. The shaft grooves 2210 may be positioned to provide multiple discrete locking positions that correspond to common implant lengths or surgical approach requirements, enabling surgeons to select appropriate shaft 1902 extensions for specific procedural needs.

[0198] The lock 2200 system may be configured to provide spring mechanism functionality through the interaction of the spring 2206, locking ball 2208, and shaft grooves 2210 components. The spring mechanism may provide automatic engagement of the locking ball 2208 with the shaft grooves 2210 when the shaft 1902 is positioned at discrete operational lengths, eliminating the need for separate engagement actions by surgical personnel. In some cases, the spring mechanism may be configured to provide tactile and audible feedback when the locking ball 2208 engages with individual shaft grooves 2210, confirming proper positioning and secure engagement of the lock 2200 system. The spring mechanism may enable rapid adjustment of the shaft 1902 position while maintaining reliable locking capability at each discrete position defined by the shaft grooves 2210.

[0199] Optionally, the length adjustment mechanism may be configured in alternative arrangements where the sleeve moves relative to a fixed shaft position, rather than the previously described moving shaft configuration. In this alternative embodiment, the shaft may be maintained in a fixed position relative to the driver assembly while the sleeve is translated along the shaft length to achieve the desired extension. This fixed-shaft, movingsleeve configuration may provide advantages in certain surgical applications where shaft stability is prioritized or where the surgical approach benefits from consistent shaft positioning. The sleeve adjustment mechanism may incorporate similar locking features, including spring, lever, or screw-based retention systems that secure the sleeve at discrete positions along the shaft length. The length adjustment operation in either configuration, whether moving shaft or moving sleeve, may be designed for single-handed or two-handed actuation based on ergonomic requirements and surgical workflow preferences. Single- handed adjustment may enable surgeons to maintain control of other instruments while making length modifications, while two-handed operation may provide enhanced control and precision during critical positioning procedures, as non-limiting examples. The choice between single or dual-handed operation may be implemented through the design of the adjustment interface, grip surfaces, and actuation force requirements.

[0200] Alternatively, and as described in greater detail below, the locking mechanism may incorporate a lever mechanism instead of or in addition to the spring -based system. The lever mechanism may include a pivotable actuator that engages with corresponding features on the shaft through mechanical advantage, providing enhanced control and locking force. The lever may be positioned to enable single-handed or two-handed operation depending on surgical requirements, with the lever arm dimensioned to provide appropriate mechanical advantage for reliable engagement and disengagement. A lever-based system may offer advantages in applications requiring higher locking forces or where tactile feedback preferences differ from spring -loaded mechanisms. Additionally, a screw mechanism may be implemented as an alternative locking approach, utilizing threaded components to provide precise positional control and secure shaft retention. The screw mechanism may incorporate a threaded collar or similar component that engages with the shaft through rotational actuation, providing variable compression force and enabling fine adjustment of locking pressure. Such screw -based systems may be particularly beneficial in applications requiring extended procedural duration or where maximum positional stability is critical, as non-limiting examples.

[0201] Also as described in greater detail below, the driver system may incorporate selfretaining features on the shaft or sleeve components to enable secure implant retention regardless of driver orientation during surgical procedures. These self-retaining features may include spring-loaded retention elements, expandable gripping mechanisms, or geometric configurations that maintain implant engagement through mechanical interference or friction- based retention. The self-retaining capability ensures that implants remain securely attached to the driver assembly whether positioned vertically, horizontally, or at various angles during surgical manipulation, preventing accidental implant displacement that could compromise procedural efficiency or patient safety. Additionally, the driver system may be configured to provide torque transmission through multiple pathways, enabling rotational force to be transferred from the handle to the shaft through various intermediate components. Torque transmission may be achieved through direct coupling from the handle to the shaft, through the locking mechanism components when engaged, via the sleeve assembly, or through a combination of these transmission paths. The torque transmission design may incorporate features such as keyed interfaces, splined connections, or friction-based coupling mechanisms that ensure reliable rotational force transfer while maintaining compatibility with the length adjustment and locking functionalities of the driver system.

[0202] Referring to Figure 23 A, a driver with AO quick connection 2300 may be provided as an enhanced configuration of the surgical instrument system that incorporates standardized connection interfaces for compatibility with existing surgical instrument platforms. The driver with AO quick connection 2300 may enable integration with established surgical workflows while maintaining the adjustable length capabilities and precision control characteristics of the driver system family. In some cases, the driver with AO quick connection 2300 may be configured to accommodate various surgical approaches and implant requirements through the combination of adjustable length mechanisms and standardized connection interfaces. The driver with AO quick connection 2300 may incorporate structural features that provide compatibility with AO (Arbeitsgemeinschaft fur Osteosynthesefragen) standard connection systems while maintaining the functional characteristics of the adjustable length driver configurations described previously.

[0203] An AO quick connector 2304 may be integrated into the driver with AO quick connection 2300 to provide standardized interface capability with existing surgical instrument systems and accessories. The AO quick connector 2304 may be positioned at a proximal end of the driver with AO quick connection 2300 and may be configured to engage with corresponding AO-compatible handles, power tools, or other surgical instruments. In some cases, the AO quick connector 2304 may incorporate mechanical features such as spring- loaded engagement mechanisms, rotational locking systems, or bayonet-style connections that provide secure attachment while enabling rapid connection and disconnection during surgical procedures. The AO quick connector 2304 may be constructed from materials that provide adequate strength and durability for repeated connection cycles while maintaining dimensional accuracy and engagement reliability throughout the operational life of the driver with AO quick connection 2300.

[0204] With continued reference to Figure 23A, a length adjustment actuation 2306 may be incorporated into the driver with AO quick connection 2300 to enable controlled modification of the operational shaft length while maintaining compatibility with the AO quick connector 2304 interface. The length adjustment actuation 2306 may be positioned to provide convenient access for surgical personnel while avoiding interference with the AO quick connector 2304 engagement and operation. In some cases, the length adjustment actuation 2306 may be configured for single-handed operation, allowing surgeons to adjust the shaft length while maintaining connection with AO-compatible instruments or handles. The length adjustment actuation 2306 may incorporate mechanical linkages or control systems that enable smooth adjustment of the shaft position while maintaining structural integrity and operational reliability of the driver with AO quick connection 2300 system.

[0205] A sleeve 2308 may be provided as part of the driver with AO quick connection 2300 to accommodate the adjustable shaft components while maintaining compatibility with the AO quick connector 2304 interface requirements. The sleeve 2308 may be dimensioned to provide structural support for the internal shaft mechanisms while accommodating the dimensional constraints imposed by the AO quick connector 2304 configuration. In some cases, the sleeve 2308 may be configured with external geometry that provides ergonomic compatibility for manual manipulation while maintaining clearance requirements for the length adjustment actuation 2306 operation. The sleeve 2308 may incorporate internal features that guide and support the adjustable shaft components throughout the operational range while maintaining alignment and clearance requirements for proper function of the AO quick connector 2304 interface.

[0206] As further shown in Figure 23 A, a length indication 2310 may be integrated into the driver with AO quick connection 2300 to provide visual feedback regarding the current operational configuration of the adjustable shaft system. The length indication 2310 may be positioned along the surface of the driver with AO quick connection 2300 components and may include markings or visual elements that remain accessible during operation with AO- compatible instruments. In some cases, the length indication 2310 may be configured to provide clear visibility even when the driver with AO quick connection 2300 is connected to AO handles or other instruments that may partially obscure portions of the driver assembly. The length indication 2310 may incorporate contrasting colors, varied line weights, or other visual enhancement features that improve readability under various lighting conditions and viewing angles encountered during surgical procedures with AO instrument systems.

[0207] A shaft 2312 may be provided within the driver with AO quick connection 2300 to enable controlled engagement with cannulated implants while maintaining compatibility with the AO quick connector 2304 torque transmission requirements. The shaft 2312 may be configured to receive rotational forces from AO-compatible handles or power tools through the AO quick connector 2304 interface and transmit these forces to the implant engagement features. In some cases, the shaft 2312 may be constructed with cross-sectional geometries and material specifications that provide adequate strength for torque transmission while maintaining compatibility with the length adjustment mechanisms incorporated within the sleeve 2308. The shaft 2312 may be dimensioned to accommodate various implant sizes and engagement requirements while maintaining structural integrity under the operational forces encountered during surgical procedures with AO instrument systems.

[0208] Referring to Figure 23B, the driver with AO quick connection 2300 may be characterized by various dimensional parameters that define the operational characteristics and compatibility requirements of the system. An overall length 2350 may represent the complete dimensional extent of the driver with AO quick connection 2300 when configured in a specific operational state, encompassing the AO quick connector 2304, sleeve 2308, and extended shaft 2312 components. The overall length 2350 may vary depending on the current adjustment state of the length adjustment actuation 2306 and may be selected to accommodate specific surgical approaches and implant requirements. In some cases, the overall length 2350 may be optimized to provide compatibility with standard surgical instrument lengths while maintaining the adjustability characteristics that enable customization for individual procedural needs.

[0209] A shaft operational length 2352 may define the effective working dimension of the shaft 2312 when extended for engagement with implants of specific sizes or for particular surgical approaches. The shaft operational length 2352 may be controlled through the length adjustment actuation 2306 and may be monitored through the length indication 2310 to ensure proper configuration for individual surgical procedures. In some cases, the shaft operational length 2352 may be selected to provide adequate reach for implant engagement while maintaining compatibility with the torque transmission characteristics of the AO quick connector 2304 interface. The shaft operational length 2352 may be adjusted throughout a range of positions to accommodate various implant lengths and surgical access requirements while maintaining structural integrity and operational performance of the driver with AO quick connection 2300 system.

[0210] With continued reference to Figure 23B, a sleeve length 2354 may define the longitudinal dimension of the sleeve 2308 component within the driver with AO quick connection 2300 assembly. The sleeve length 2354 may be selected to provide adequate support for the shaft 2312 throughout the operational adjustment range while maintaining compatibility with the AO quick connector 2304 interface requirements. In some cases, the sleeve length 2354 may be optimized to balance structural support characteristics with overall system dimensions and weight considerations. The sleeve length 2354 may be coordinated with the shaft operational length 2352 to ensure that adequate overlap and support are maintained throughout the adjustment range of the length adjustment actuation 2306 system. A shaft diameter 2356 may define the cross-sectional dimension of the shaft 2312 and may be selected to provide adequate mechanical strength for torque transmission while maintaining compatibility with the cannulated implants and the internal clearance requirements of the sleeve 2308. The shaft diameter 2356 may be optimized to accommodate the forces transmitted through the AO quick connector 2304 interface while maintaining structural integrity during operational loading. In some cases, the shaft diameter 2356 may be coordinated with standard AO instrument specifications to ensure compatibility with existing surgical workflows and instrument systems. The shaft diameter 2356 may be selected to provide appropriate clearance within the sleeve 2308 while maintaining effective torque transmission characteristics and operational reliability throughout the adjustment range of the driver with AO quick connection 2300.

[0211] As further shown in Figure 23B, a sleeve diameter 2358 may define the external cross-sectional dimension of the sleeve 2308 and may be selected to provide structural integrity while maintaining ergonomic compatibility for manual manipulation during surgical procedures. The sleeve diameter 2358 may be optimized to accommodate the internal components including the shaft 2312 and length adjustment mechanisms while providing adequate wall thickness for structural support. In some cases, the sleeve diameter 2358 may be coordinated with the dimensional requirements of the AO quick connector 2304 interface to ensure compatible integration and smooth operational characteristics. The sleeve diameter 2358 may be selected to provide comfortable grip characteristics for surgical personnel while maintaining compatibility with standard surgical instrument handling procedures and sterilization requirements.

[0212] A cannulation diameter 2360 may define the internal channel dimension within the shaft 2312 when the driver with AO quick connection 2300 is configured as a cannulated device. The cannulation diameter 2360 may be selected to accommodate standard guide wire sizes while maintaining adequate wall thickness for structural integrity and torque transmission capability. In some cases, the cannulation diameter 2360 may be optimized to provide clearance for guide wire passage while maintaining compatibility with the dimensional constraints imposed by the shaft diameter 2356 and the structural requirements of the adjustable length mechanisms. The cannulation diameter 2360 may be coordinated with standard surgical guide wire specifications to ensure compatibility with existing surgical procedures and instrument systems that incorporate guide wire-based positioning and insertion techniques. The shaft torque transmission within the driver with AO quick connection 2300 may be facilitated through various mechanical pathways that enable effective transfer of rotational forces from the AO quick connector 2304 to the shaft 2312 engagement features. In some cases, the shaft torque transmission may be transferred directly from the AO quick connector 2304 to the shaft 2312 through mechanical coupling features that maintain rotational alignment and force transmission capability throughout the adjustment range of the length adjustment actuation 2306. The shaft torque transmission may alternatively be routed through the sleeve 2308 components, where rotational forces from the AO quick connector 2304 may be transmitted to the sleeve 2308 and subsequently transferred to the shaft 2312 through internal engagement mechanisms. In some cases, the shaft torque transmission may incorporate contributions from multiple components including the AO quick connector 2304, sleeve 2308, and internal mechanical linkages that work together to provide reliable rotational force transfer while maintaining the adjustability characteristics of the driver with AO quick connection 2300 system.

[0213] The integration of the AO quick connector 2304 with the adjustable length driver system may provide enhanced versatility for surgical procedures by combining the standardized interface compatibility of AO instrument systems with the customizable length characteristics of the adjustable driver configurations. The AO quick connector 2304 may enable the driver with AO quick connection 2300 to be used with existing AO handles, power tools, and other accessories while maintaining the ability to adjust the shaft operational length 2352 according to specific procedural requirements. In some cases, the combination of AO compatibility and adjustable length capability may reduce the number of different driver instruments required for various surgical procedures, potentially improving surgical efficiency and reducing instrument inventory requirements. The AO quick connector 2304 integration may also enable the driver with AO quick connection 2300 to benefit from the torque control and power assistance capabilities of AO-compatible power tools while maintaining the precision positioning characteristics enabled by the length adjustment actuation 2306 and length indication 2310 systems.

[0214] The overall length of the driver 2300 may be implemented according to a variety of suitable ranges, including but not limited to optionally 100-400 mm, preferably 150-300 mm and more preferably 200-275 mm. The overall weight of the driver 2300 may be implemented according to a variety of suitable ranges, including but not limited to optionally 15-1000 gr, preferably 50-500 gr and more preferably 100-300 gr. Referring to Figures 24A and 24B, a driver 2400 may be provided with comprehensive operational range specifications that define the adjustable length capabilities and dimensional parameters of the surgical instrument system. Preferably, driver 2400 is a non-limiting example of an AO adjustable length cannulated driver. The driver 2400 may be configured to operate across a range of adjustable operational lengths to accommodate different surgical requirements, implant dimensions, and procedural approaches. In some cases, the driver 2400 may incorporate mechanical adjustment mechanisms that enable controlled transition between different operational configurations while maintaining structural integrity and functional performance throughout the adjustment range. The driver 2400 may be constructed with materials and dimensional specifications that provide compatibility with the fiber-reinforced fully threaded implants while accommodating the various operational length requirements encountered in different surgical procedures. The operational range specifications of the driver 2400 may be optimized to balance versatility in surgical applications with mechanical reliability and ease of use for surgical personnel.

[0215] Figure 24A illustrates the driver 2400 configured to a maximal operational length 2402 that represents the fully extended operational configuration of the adjustable length system. The maximal operational length 2402 may be achieved when the internal shaft components are extended to the furthest position relative to the supporting sleeve components, providing maximum reach for procedures requiring greater driver extension. In some cases, the maximal operational length 2402 may be selected to accommodate longer implants or surgical approaches where increased working distance may be beneficial for surgical access and visualization. The maximal operational length 2402 may be defined by mechanical stops or limiting features within the driver 2400 that prevent over-extension of the internal components while maintaining structural integrity under operational loading conditions. The maximal operational length 2402 may be coordinated with the dimensional specifications of the longest implants in the surgical system to ensure adequate engagement and control throughout the insertion procedure.

[0216] With continued reference to Figure 24A, a sleeve length 2404 may be indicated as a dimensional parameter that defines the longitudinal extent of the sleeve components within the driver 2400 assembly. The sleeve length 2404 may remain constant throughout the operational range adjustments of the driver 2400, providing consistent structural support and guidance for the internal shaft components regardless of the current extension configuration. In some cases, the sleeve length 2404 may be selected to provide adequate overlap with the internal shaft components throughout the entire adjustment range, ensuring that structural support and alignment are maintained even when the driver 2400 is configured to the maximal operational length 2402. The sleeve length 2404 may be optimized to balance structural support characteristics with overall system dimensions and weight considerations, enabling effective surgical manipulation while providing reliable mechanical performance. The sleeve length 2404 may be coordinated with the maximal operational length 2402 to ensure that adequate mechanical engagement is maintained between the sleeve and shaft components throughout the operational range.

[0217] Figure 24B depicts the driver 2400 configured to a minimal operational length 2406 that represents the most compact operational configuration of the adjustable length system. The minimal operational length 2406 may be achieved when the internal shaft components are retracted to the shortest position relative to the sleeve components, providing a compact configuration that may be suitable for procedures requiring reduced driver extension. In some cases, the minimal operational length 2406 may be selected to accommodate shorter implants or surgical approaches where space constraints limit the available working distance. The minimal operational length 2406 may be defined by mechanical stops or limiting features within the driver 2400 that prevent over-retraction of the internal components while maintaining functional engagement capability for implant insertion procedures. The minimal operational length 2406 may be coordinated with the dimensional specifications of the shortest implants in the surgical system to ensure adequate engagement and control throughout the insertion procedure.

[0218] The operational range between the minimal operational length 2406 and the maximal operational length 2402 may define the adjustment capability of the driver 2400 system and may be selected to accommodate the full range of implant lengths and surgical approaches encountered in clinical applications. In some cases, the operational range may be configured to provide continuous adjustment capability, enabling surgeons to select any operational length within the defined range according to specific procedural requirements. The operational range may alternatively be configured to provide discrete adjustment positions that correspond to common implant lengths or standardized surgical approach requirements. The adjustment mechanisms within the driver 2400 may enable controlled transition throughout the operational range while maintaining consistent torque transmission characteristics and structural integrity at all operational length configurations.

[0219] As further shown in Figures 24A and 24B, the sleeve length 2404 may provide a reference dimension that remains constant while the driver 2400 transitions between the minimal operational length 2406 and the maximal operational length 2402 configurations. The sleeve length 2404 may be selected to ensure that adequate structural support is provided for the internal shaft components throughout the entire adjustment range, preventing mechanical instability or alignment issues that could compromise surgical precision. In some cases, the sleeve length 2404 may be optimized to provide maximum structural support while minimizing the overall dimensions and weight of the driver 2400 system. The sleeve length 2404 may incorporate dimensional tolerances that accommodate manufacturing variations while maintaining consistent performance characteristics across different driver 2400 units within the surgical instrument system.

[0220] The dimensional specifications of the driver 2400 may be coordinated with the operational requirements of the fiber-reinforced fully threaded implants to ensure compatible engagement and effective insertion control throughout the operational range. In some cases, the maximal operational length 2402 may be selected to provide adequate reach for the longest implants in the surgical system while maintaining structural integrity and torque transmission capability. The minimal operational length 2406 may be selected to provide compact operation for the shortest implants while maintaining adequate engagement length for controlled insertion procedures. The sleeve length 2404 may be optimized to provide consistent structural support for all operational length configurations while accommodating the mechanical adjustment mechanisms and locking systems incorporated within the driver 2400.

[0221] The operational range specifications may enable surgical personnel to customize the driver 2400 configuration according to specific anatomical requirements and surgical approaches encountered in individual procedures. In some cases, the adjustment capability between the minimal operational length 2406 and maximal operational length 2402 may eliminate the need for multiple different driver instruments, potentially improving surgical efficiency and reducing instrument inventory requirements. The operational range may be selected to accommodate the most common implant lengths and surgical approaches while providing flexibility for specialized procedures that may require customized driver configurations. The dimensional parameters of the driver 2400 may be standardized across the surgical instrument system to ensure consistent performance characteristics and compatibility with the various implant sizes and surgical accessories provided within the comprehensive bone fixation system.

[0222] The shaft adjustment length of the driver 2400 may be implemented according to a variety of suitable ranges, including but not limited to optionally 10-150 mm, preferably 30- 120 mm and more preferably 40-100 mm. The shaft minimal operational length of the driver 2400 may be implemented according to a variety of suitable ranges, including but not limited to optionally 1-60 mm, preferably 10-50 mm and more preferably 30-40 mm. The shaft maximal operational length of the driver 2400 may be implemented according to a variety of suitable ranges, including but not limited to optionally 10-200 mm, preferably 30-175 mm and more preferably 70-100 mm.

[0223] The sleeve length of the driver 2400 may be implemented according to a variety of suitable ranges, including but not limited to optionally 3.0-100 mm, preferably 15-75 mm and more preferably 30-60 mm.

[0224] The dimensions of the sleeve and shaft for driver 2400, as a non-limiting example of an AO adjustable length cannulated driver, may be explained as for Figures 20A-C. However, the precise values may differ as follows.

[0225] The shaft comer radii of the driver 2400 may be implemented according to a variety of suitable ranges, including but not limited to optionally 0.01-0.85 mm, preferably 0.05-0.5 mm and more preferably 0.1-0.3 mm. The shaft incircle diameter of the driver 2400 may be implemented according to a variety of suitable ranges, including but not limited to optionally 1.0-5.0 mm, preferably 1.5-3.5 mm and more preferably 2.0-3.0 mm. The shaft circumcircle diameter of the driver 2400 may be implemented according to a variety of suitable ranges, including but not limited to optionally 1.0-6.0 mm, preferably 1.6-4.0 mm and more preferably 2.0-3.5 mm. The shaft minimal wall thickness of the driver 2400 may be implemented according to a variety of suitable ranges, including but not limited to optionally 0.1-2.5 mm, preferably 0.2-1.0 mm and more preferably 0.3-0.6 mm. The shaft cannulation incircle diameter of the driver 2400 may be implemented according to a variety of suitable ranges, including but not limited to optionally 0.2-3.0 mm, preferably 0.5-2.5 mm and more preferably 1.0-2.0 mm. The shaft cannulation circumcircle diameter of the driver 2400 may be implemented according to a variety of suitable ranges, including but not limited to optionally 0.3-3.5 mm, preferably 0.7-3.0 mm and more preferably 1.2-2.5 mm.

[0226] The sleeve incircle diameter of the driver 2400 may be implemented according to a variety of suitable ranges, including but not limited to optionally 1.3-8.0 mm, preferably 1.8- 7.0 mm and more preferably 2.1-6.0 mm. The sleeve circumcircle diameter of the driver 2400 may be implemented according to a variety of suitable ranges, including but not limited to optionally 1.4-8.5 mm, preferably 1.9-7.5 mm and more preferably 2.2-6.5 mm. The sleeve cannulation incircle diameter of the driver 2400 may be implemented according to a variety of suitable ranges, including but not limited to optionally 1.1-6.5 mm, preferably 1.6-4.5 mm and more preferably 1.9-4.0 mm. The sleeve cannulation circumcircle diameter of the driver 2400 may be implemented according to a variety of suitable ranges, including but not limited to optionally 1.3-7.5 mm, preferably 1.8-5.5 mm and more preferably 2.1-5.0 mm. The sleeve comer radii of the driver 2400 may be implemented according to a variety of suitable ranges, including but not limited to optionally 0.01-0.85 mm, preferably 0.05-0.5 mm and more preferably 0. 1-0.3 mm. The sleeve cannulation comer radii of the driver 2400 may be implemented according to a variety of suitable ranges, including but not limited to optionally 0.01-1.5 mm, preferably 0.05-0.1 mm and more preferably 0.1-0.75 mm.

[0227] Referring to Figure 25, a driver 2500 may be provided with enhanced length indication capabilities that facilitate precise control and monitoring of operational parameters during surgical procedures. The driver 2500 may incorporate similar stmctural and functional characteristics to the driver 1900 while providing additional features for length indication and operational feedback. The driver 2500 may be configured to accommodate various surgical approaches and implant requirements through adjustable length mechanisms that may be monitored and controlled through integrated indication systems. In some cases, the driver 2500 may be constructed with materials and dimensional specifications that provide compatibility with the fiber-reinforced fully threaded implants while maintaining structural integrity during operational loading and adjustment procedures.

[0228] A length indication 2502 may be incorporated into the driver 2500 to provide comprehensive feedback regarding the operational configuration and active shaft portion of the driver 2500 system. The length indication 2502 may extend along a portion of the driver 2500 and may include various visual elements that communicate operational parameters to surgical personnel. In some cases, the length indication 2502 may be positioned to remain accessible and visible during surgical procedures, enabling real-time monitoring of driver 2500 configuration without requiring interruption of surgical workflows. The length indication 2502 may incorporate graduated markings, numerical indicators, or other reference systems that provide precise information regarding the active shaft portion and operational length of the driver 2500. The length indication 2502 may be designed to withstand the environmental conditions and handling requirements associated with surgical procedures while maintaining clear visibility and accurate indication throughout the operational life of the driver 2500.

[0229] With continued reference to Figure 25, a length indication closeup 2502A may provide detailed visualization of the length indication 2502 features and markings incorporated within the driver 2500 system. The length indication closeup 2502A may illustrate the specific design elements and visual characteristics of the length indication 2502, including the spacing, sizing, and formatting of individual markings or indicators. In some cases, the length indication closeup 2502A may demonstrate the precision and clarity of the length indication 2502 system, showing how individual markings correspond to specific operational shaft positions or active shaft portion measurements. The length indication closeup 2502A may reveal the manufacturing quality and durability characteristics of the length indication 2502, including the depth, contrast, and permanence of the visual markings applied to the driver 2500 surface.

[0230] The length indication closeup 2502A may show how the length indication 2502 incorporates multiple types of visual elements to provide comprehensive operational feedback to surgical personnel. In some cases, the length indication closeup 2502A may illustrate the use of primary markings for major measurement increments combined with secondary markings for intermediate measurements, enabling both coarse and fine adjustment of the driver 2500 operational length. The length indication closeup 2502A may demonstrate the integration of numerical indicators with graduated markings to provide both quantitative and qualitative feedback regarding the active shaft portion. The length indication closeup 2502A may also show how the length indication 2502 incorporates visual enhancement features such as contrasting colors, varied line weights, or specialized formatting to improve readability and reduce the potential for misinterpretation during surgical procedures.

[0231] The length indication system incorporated within the driver 1900 and driver 2500 may be positioned over various components of the driver assemblies to provide optimal accessibility and functionality for surgical personnel. In some cases, the length indication elements may be positioned over the handle 1906 to provide convenient access during manual manipulation of the driver systems. The length indication features may alternatively be positioned over the sleeve 1904 or sleeve 2050 to provide visual feedback in proximity to the length adjustment mechanisms and operational components of the driver systems. In some cases, the length indication elements may be positioned over the shaft 1902 or operational shaft 2100 to provide direct indication of the active shaft portion and operational length configuration. The positioning of length indication elements may be selected based on the specific design requirements of individual driver configurations and the operational preferences of surgical personnel for different types of procedures and surgical approaches.

[0232] The length indication system may incorporate various design approaches to accommodate different surgical environments and user preferences while maintaining consistent functionality across the driver system family. In some cases, the length indication elements may be configured as permanent markings that are applied during manufacturing processes and remain fixed throughout the operational life of the driver systems. The length indication features may alternatively be configured as removable or replaceable elements that may be customized or updated according to specific procedural requirements or user preferences. The length indication system may incorporate standardized marking conventions that provide consistent interpretation across different driver configurations and surgical applications, enabling surgical personnel to quickly adapt to different driver systems without requiring extensive retraining or familiarization procedures.

[0233] Referring to Figures 26A and 26B, alternative locking mechanism configurations may be provided to accommodate different operational requirements and user preferences within the driver system family. A compression locking assembly 2600 may be incorporated into driver configurations that require enhanced locking force or different actuation characteristics compared to the spring-loaded ball mechanism shown in Figure 22. The compression locking assembly 2600 may be configured to provide distributed locking force around the circumference of the shaft 1902, potentially offering enhanced holding capability for demanding surgical applications. In some cases, the compression locking assembly 2600 may be designed to accommodate continuous positioning of the shaft 1902 rather than discrete positions defined by shaft grooves 2210, providing greater flexibility in operational length selection.

[0234] A compression locking nut 2602 may be provided as part of the compression locking assembly 2600 to enable controlled application of compression force for shaft 1902 locking. The compression locking nut 2602 may be configured for rotational actuation, allowing surgical personnel to adjust the locking force by rotating the compression locking nut 2602 relative to other components of the compression locking assembly 2600. In some cases, the compression locking nut 2602 may incorporate threading or other mechanical features that convert rotational motion into axial compression force for locking the shaft 1902 position. The compression locking nut 2602 may be constructed from materials that provide adequate strength and durability for repeated actuation while maintaining smooth operation throughout the adjustment range. The compression locking nut 2602 may be dimensioned to provide ergonomic compatibility for manual actuation while maintaining structural integrity under operational loading conditions.

[0235] With continued reference to Figures 26A and 26B, locking leaflets 2604 may be incorporated into the compression locking assembly 2600 to provide distributed engagement with the shaft 1902 surface. The locking leaflets 2604 may be configured to flex inward under compression force from the compression locking nut 2602, creating frictional engagement with the shaft 1902 that prevents relative movement. In some cases, the locking leaflets 2604 may be constructed from materials that provide appropriate flexibility and friction characteristics for effective shaft 1902 engagement while maintaining durability throughout repeated locking and unlocking cycles. The locking leaflets 2604 may be positioned around the circumference of the shaft 1902 to provide uniform compression force distribution and reliable locking performance. The locking leaflets 2604 may be configured with geometric profiles that optimize contact area and friction characteristics with the shaft 1902 surface while accommodating the compression forces applied by the compression locking nut 2602.

[0236] A locking mechanism 2650 may be provided as an alternative configuration that incorporates lever-actuated functionality for shaft 1902 positioning and securing. The locking mechanism 2650 may be configured to provide rapid engagement and disengagement through lever actuation rather than rotational or compression-based systems. In some cases, the locking mechanism 2650 may be designed for single-handed operation, enabling surgeons to quickly adjust and secure the shaft 1902 position while maintaining control of other surgical instruments. The locking mechanism 2650 may incorporate mechanical advantage features that amplify the actuation force applied by surgical personnel, enabling secure locking with minimal manual effort. The locking mechanism 2650 may be constructed to provide reliable performance throughout repeated operational cycles while maintaining compatibility with the overall driver system configuration.

[0237] A spring 2652 may be incorporated into the locking mechanism 2650 to provide biasing force for the lever-actuated components and maintain consistent engagement characteristics. The spring 2652 may be configured to return the locking mechanism 2650 to a default position when not actively actuated, providing predictable operational behavior for surgical personnel. In some cases, the spring 2652 may be selected to provide appropriate force characteristics that balance reliable engagement with manageable actuation requirements for lever operation. The spring 2652 may be positioned within the locking mechanism 2650 to provide optimal force distribution while maintaining compatibility with the other mechanical components of the lever-actuated system. The spring 2652 may be constructed from materials that provide consistent performance characteristics and durability throughout the operational life of the locking mechanism 2650.

[0238] As further shown in Figures 26A and 26B, an actuation lever 2654 may be provided to enable manual control of the locking mechanism 2650 engagement and disengagement. The actuation lever 2654 may be positioned to provide convenient access for surgical personnel while maintaining ergonomic compatibility with the overall driver configuration. In some cases, the actuation lever 2654 may be configured with geometric features that provide enhanced grip characteristics and tactile feedback during operation. The actuation lever 2654 may be constructed from materials that provide adequate strength and durability for repeated actuation while maintaining smooth operation throughout the engagement range. The actuation lever 2654 may incorporate mechanical linkage features that connect to other components of the locking mechanism 2650, enabling controlled engagement and disengagement of the shaft 1902 locking function through lever movement.

[0239] A locking tooth 2656 may be incorporated into the locking mechanism 2650 to provide mechanical engagement with corresponding features on the shaft 1902 or associated components. The locking tooth 2656 may be positioned to engage with discrete positioning features when the actuation lever 2654 is operated, providing secure positioning of the shaft 1902 at specific operational lengths. In some cases, the locking tooth 2656 may be configured with geometric profiles that provide reliable engagement while enabling smooth transition during actuation lever 2654 operation. The locking tooth 2656 may be constructed from materials that provide wear resistance and durability characteristics suitable for repeated engagement cycles. The locking tooth 2656 may be biased by the spring 2652 to maintain consistent engagement force and reliable locking performance when the actuation lever 2654 is in the engaged position.

[0240] Locking grooves 2658 may be provided to accommodate engagement with the locking tooth 2656 and define discrete positioning locations for the locking mechanism 2650. The locking grooves 2658 may be positioned at specific intervals to correspond with desired operational length settings for the driver system. In some cases, the locking grooves 2658 may be configured with geometric profiles that provide secure engagement with the locking tooth 2656 while enabling smooth transition during actuation lever 2654 operation. The locking grooves 2658 may be dimensioned to accommodate the locking tooth 2656 while maintaining structural integrity under operational loading conditions. The locking grooves 2658 may be positioned to provide multiple discrete locking positions that enable surgeons to select appropriate shaft 1902 extensions for various surgical procedures and implant requirements.

[0241] The locking mechanism configurations described may provide screw mechanism functionality through alternative mechanical arrangements that incorporate threaded components or rotational actuation systems. Screw mechanism implementations may enable continuous positioning of the shaft 1902 rather than discrete positions, providing enhanced flexibility in operational length selection. In some cases, screw mechanism configurations may incorporate self-locking characteristics that maintain shaft 1902 position without requiring continuous actuation force from surgical personnel. The screw mechanism approach may provide enhanced holding force for demanding surgical applications while maintaining smooth adjustment capability throughout the operational range. The various locking mechanism types may be selected based on specific procedural requirements, user preferences, and compatibility with different driver system configurations to provide optimal performance for diverse surgical applications.

[0242] Features described with regard to the locking and / or length adjustment mechanism may also be implemented with regard to those mechanisms described in Figure 22 and the accompanying text.

[0243] Referring to Figure 27A, a sharpener assembly 2700 may be provided as part of the comprehensive surgical instrument system to enable modification and preparation of the fiber-reinforced fully threaded implants according to specific procedural requirements. The sharpener assembly 2700 may enable surgeons to customize implant tip geometry and insertion characteristics through controlled sharpening processes that may be performed immediately prior to implant insertion procedures. In some cases, the sharpener assembly 2700 may be configured to accommodate various implant sizes and cross-sectional geometries while providing consistent sharpening performance and tip preparation capabilities. The sharpener assembly 2700 may incorporate structural features that facilitate controlled material removal from implant surfaces while maintaining dimensional accuracy and geometric precision throughout the sharpening process. The sharpener assembly 2700 may be constructed with materials and dimensional specifications that provide durability and reliability for repeated use in surgical environments while maintaining compatibility with the bioabsorbable composite materials incorporated within the fiber-reinforced fully threaded implants.

[0244] A sharpening element 2702 may be incorporated into the sharpener assembly 2700 to provide the material removal capability for implant tip preparation and geometric modification. The sharpening element 2702 may be configured to engage with the implant surfaces in a controlled manner that enables precise material removal while maintaining the structural integrity of the implant composite materials. In some cases, the sharpening element 2702 may be constructed as a knife configuration that provides cutting action through direct contact with the implant surfaces during sharpening procedures. The sharpening element 2702 may alternatively be configured as a whetstone that provides abrasive material removal through controlled grinding action against the implant surfaces. In some cases, the sharpening element 2702 may incorporate thermal element functionality that enables material removal through controlled heating processes that may be suitable for specific composite material formulations. The sharpening element 2702 may also be configured as sandpaper that provides controlled abrasive action for fine surface preparation and tip geometry refinement. The sharpening element 2702 may incorporate combinations of these material removal approaches to provide comprehensive sharpening capability for different implant preparation requirements and composite material characteristics.

[0245] With continued reference to Figure 27A, an implant sharpening cavity 2704 may be provided within the sharpener assembly 2700 to accommodate the implant during sharpening procedures and provide controlled positioning relative to the sharpening element 2702. The implant sharpening cavity 2704 may be dimensioned to receive various implant sizes while maintaining proper alignment and engagement with the sharpening element 2702 throughout the material removal process. In some cases, the implant sharpening cavity 2704 may be configured with geometric profiles that correspond to the cross-sectional characteristics of the cannulated threaded implants, enabling secure positioning and controlled orientation during sharpening procedures. The implant sharpening cavity 2704 may incorporate depth control features that limit the extent of material removal and ensure consistent tip geometry preparation across multiple implants. The implant sharpening cavity 2704 may be constructed with materials that provide wear resistance and dimensional stability throughout repeated sharpening cycles while maintaining smooth surface characteristics that facilitate implant insertion and removal during preparation procedures.

[0246] A sharpener body 2706 may provide the structural framework for the sharpener assembly 2700 and may accommodate the sharpening element 2702 and implant sharpening cavity 2704 within an integrated assembly configuration. The sharpener body 2706 may be constructed to provide mechanical support for the sharpening element 2702 while maintaining proper alignment and positioning relative to the implant sharpening cavity 2704. In some cases, the sharpener body 2706 may be configured with ergonomic features that facilitate manual manipulation and control during sharpening procedures, enabling surgical personnel to maintain proper positioning and apply appropriate forces throughout the material removal process. The sharpener body 2706 may incorporate mounting features or attachment interfaces that enable secure positioning of the sharpening element 2702 within the sharpener assembly 2700. The sharpener body 2706 may be dimensioned to provide adequate structural integrity for the forces encountered during sharpening procedures while maintaining compact dimensions that facilitate storage and handling within surgical instrument sets.

[0247] The sharpening element 2702 may be secured within the sharpener body 2706 through various attachment methods that provide reliable positioning while accommodating replacement or maintenance requirements. In some cases, the sharpening element 2702 may be fixed within the sharpener body 2706 through screw attachment methods that enable controlled positioning and secure retention during sharpening procedures. The sharpening element 2702 may alternatively be secured through nail attachment methods that provide permanent or semi -permanent installation within the sharpener body 2706. In some cases, the sharpening element 2702 may be fixed through adhesive attachment methods that provide secure bonding between the sharpening element 2702 and the sharpener body 2706 while accommodating various material combinations and geometric configurations. The sharpening element 2702 may be secured through overmolded attachment methods where the sharpener body 2706 material may be formed around the sharpening element 2702 during manufacturing processes to provide integrated attachment and positioning. The sharpening element 2702 may also be fixed through press-fit attachment methods that enable secure retention through mechanical interference between the sharpening element 2702 and corresponding features within the sharpener body 2706.

[0248] Referring to Figures 27B and 27C, the sharpener assembly 2700 may be characterized by various dimensional parameters that define the overall size and geometric characteristics of the sharpening system. The dimensional specifications of the sharpener assembly 2700 may be selected to provide adequate functionality for implant preparation while maintaining compact dimensions that facilitate integration within surgical instrument sets and storage systems. In some cases, the dimensional parameters of the sharpener assembly 2700 may be optimized to balance sharpening capability with portability and ease of handling during surgical procedures. The dimensional characteristics may be standardized across different sharpener assembly 2700 configurations to ensure consistent performance and compatibility with various implant sizes and preparation requirements encountered in clinical applications.

[0249] An overall height 2730 may define the vertical dimension of the sharpener assembly 2700 and may be selected to provide adequate clearance for implant insertion into the implant sharpening cavity 2704 while maintaining compact dimensions for storage and handling. The overall height 2730 may be optimized to accommodate the dimensional requirements of the sharpening element 2702 and the depth characteristics of the implant sharpening cavity 2704 while providing adequate structural integrity for the sharpener body 2706. In some cases, the overall height 2730 may be coordinated with standard surgical instrument dimensions to ensure compatibility with existing storage systems and instrument organization protocols. The overall height 2730 may be selected to provide ergonomic compatibility for manual manipulation while maintaining adequate mechanical strength for the forces encountered during sharpening procedures.

[0250] With continued reference to Figures 27B and 27C, an overall length 2732 may define the longitudinal dimension of the sharpener assembly 2700 and may be selected to accommodate the full length of the implant sharpening cavity 2704 while providing adequate structural support for the sharpening element 2702 positioning and attachment features. The overall length 2732 may be optimized to provide adequate working space for implant insertion and manipulation during sharpening procedures while maintaining compact dimensions that facilitate storage and transport within surgical instrument sets. In some cases, the overall length 2732 may be coordinated with the dimensional specifications of the longest implants in the surgical system to ensure adequate accommodation and preparation capability. The overall length 2732 may be selected to provide balanced proportions relative to the overall height 2730 and overall width 2734 to ensure stable positioning and controlled operation during sharpening procedures.

[0251] An overall width 2734 may define the lateral dimension of the sharpener assembly 2700 and may be selected to provide adequate structural support for the internal components while maintaining ergonomic compatibility for manual handling and manipulation. The overall width 2734 may be optimized to accommodate the cross-sectional requirements of the implant sharpening cavity 2704 and the mounting features for the sharpening element 2702 while providing adequate material thickness for structural integrity of the sharpener body 2706. In some cases, the overall width 2734 may be selected to provide stable positioning when the sharpener assembly 2700 may be placed on surgical surfaces or within instrument organization systems. The overall width 2734 may be coordinated with the overall height 2730 and overall length 2732 to provide balanced dimensional proportions that facilitate controlled operation and reliable performance throughout repeated sharpening cycles.

[0252] The sharpener assembly 2700 components may be constructed from various materials that provide the mechanical properties and durability characteristics required for effective implant preparation and repeated use in surgical environments. In some cases, the sharpener body 2706 may be constructed from metal materials that provide enhanced structural integrity and wear resistance for demanding sharpening applications. The sharpener body 2706 may alternatively be constructed from polymer materials that provide reduced weight and improved ergonomic characteristics while maintaining adequate strength for sharpening procedures. In some cases, the sharpener assembly 2700 may incorporate combinations of metal and polymer materials to optimize specific performance characteristics while balancing strength, weight, and cost considerations. The material selection for the sharpener assembly 2700 components may be coordinated with the biocompatible requirements of surgical instruments while providing compatibility with standard sterilization procedures and protocols encountered in clinical applications.

[0253] Referring to Figures 27D and 27E, the implant sharpening cavity 2704 may be configured with specific geometric features and dimensional specifications that enable controlled material removal and precise tip preparation for the fiber-reinforced fully threaded implants. The internal geometry of the implant sharpening cavity 2704 may incorporate multiple distinct regions that provide different functional characteristics during the sharpening process, enabling surgeons to achieve customized tip configurations according to specific procedural requirements. In some cases, the geometric features of the implant sharpening cavity 2704 may be optimized to accommodate various implant diameters while maintaining consistent sharpening performance and dimensional accuracy throughout the material removal process. The dimensional specifications may be selected to provide controlled engagement between the implant surfaces and the sharpening element 2702 while preventing excessive material removal that could compromise the structural integrity of the bioabsorbable composite materials.

[0254] A proximal cone portion length 2750 may define the longitudinal extent of a tapered region within the implant sharpening cavity 2704 that provides initial engagement and positioning for implants during insertion into the sharpener assembly 2700. The proximal cone portion length 2750 may be selected to provide adequate guidance for implant alignment while accommodating manufacturing tolerances and dimensional variations that may be encountered across different implant sizes within the surgical system. In some cases, the proximal cone portion length 2750 may be optimized to provide smooth transition from the external opening of the implant sharpening cavity 2704 to the internal working regions where material removal occurs. The proximal cone portion length 2750 may be coordinated with the overall dimensions of the sharpener assembly 2700 to ensure adequate structural support while maintaining compact external dimensions that facilitate handling and storage within surgical instrument sets.

[0255] With continued reference to Figures 27D and 27E, a proximal cone portion angle 2752 may define the angular geometry of the tapered region that provides initial implant engagement within the implant sharpening cavity 2704. The proximal cone portion angle 2752 may be selected to provide controlled insertion characteristics that enable smooth implant positioning while preventing binding or excessive resistance during the initial engagement phase of the sharpening process. In some cases, the proximal cone portion angle 2752 may be optimized to accommodate the range of implant diameters encountered in the surgical system while providing consistent guidance and alignment characteristics. The proximal cone portion angle 2752 may be coordinated with the proximal cone portion length 2750 to provide appropriate transition geometry that facilitates controlled implant insertion and positioning relative to the sharpening element 2702.

[0256] A distal cone portion angle 2754 may define the angular geometry of a tapered region at the opposite end of the implant sharpening cavity 2704 that provides controlled material removal and tip shaping functionality during the sharpening process. The distal cone portion angle 2754 may be selected to provide the desired tip geometry for the sharpened implants while accommodating the material removal characteristics of the bioabsorbable composite materials incorporated within the fiber-reinforced fully threaded implants. In some cases, the distal cone portion angle 2754 may be optimized to provide controlled cutting action that removes material gradually and uniformly to achieve consistent tip preparation across multiple implants. The distal cone portion angle 2754 may be coordinated with the sharpening element 2702 positioning to ensure effective engagement and material removal throughout the sharpening process while maintaining dimensional accuracy and geometric precision.

[0257] As further shown in Figures 27D and 27E, a distal cone portion length 2756 may define the longitudinal extent of the tapered region that provides the primary material removal functionality within the implant sharpening cavity 2704. The distal cone portion length 2756 may be selected to provide adequate working distance for controlled material removal while maintaining structural integrity of the sharpener body 2706 and proper positioning of the sharpening element 2702. In some cases, the distal cone portion length 2756 may be optimized to accommodate the range of tip geometries that may be desired for different surgical applications and implant insertion requirements. The distal cone portion length 2756 may be coordinated with the distal cone portion angle 2754 to provide appropriate material removal characteristics that achieve the desired tip sharpness and geometric configuration while preventing excessive material removal that could compromise implant structural integrity. A distal cone portion minimal diameter 2758 may define the smallest cross-sectional dimension within the tapered region of the implant sharpening cavity 2704 and may establish the final tip diameter that may be achieved through the sharpening process. The distal cone portion minimal diameter 2758 may be selected to provide the desired tip sharpness characteristics while maintaining adequate material thickness to preserve the structural integrity of the sharpened implant tip. In some cases, the distal cone portion minimal diameter 2758 may be optimized to accommodate the mechanical properties of the bioabsorbable composite materials while providing effective insertion characteristics for various bone densities and anatomical conditions. The distal cone portion minimal diameter 2758 may be coordinated with the distal cone portion angle 2754 and the distal cone portion length 2756 to provide controlled material removal that achieves consistent tip geometry across multiple sharpening cycles.

[0258] A cavity straight portion length 2760 may define the longitudinal extent of a cylindrical region within the implant sharpening cavity 2704 that provides consistent cross- sectional geometry for controlled implant positioning and alignment during the sharpening process. The cavity straight portion length 2760 may be positioned between the proximal and distal cone portions to provide a reference region where the implant may be positioned with consistent orientation relative to the sharpening element 2702. In some cases, the cavity straight portion length 2760 may be selected to accommodate the range of implant lengths encountered in the surgical system while providing adequate support and guidance throughout the sharpening process. The cavity straight portion length 2760 may be optimized to provide stable implant positioning while maintaining adequate clearance for material removal operations and preventing interference between the implant threads and the internal surfaces of the implant sharpening cavity 2704.

[0259] With continued reference to Figures 27D and 27E, a cavity nominal diameter 2762 may define the cross-sectional dimension of the cylindrical region within the implant sharpening cavity 2704 and may establish the clearance characteristics for implant insertion and positioning during sharpening procedures. The cavity nominal diameter 2762 may be selected to provide adequate clearance for the largest implants in the surgical system while maintaining proper alignment and positioning relative to the sharpening element 2702. In some cases, the cavity nominal diameter 2762 may be optimized to accommodate the external thread dimensions of the cannulated threaded implants while providing controlled engagement with the sharpening element 2702 during material removal operations. The cavity nominal diameter 2762 may be coordinated with the cavity straight portion length 2760 to provide consistent positioning characteristics that enable repeatable sharpening results across multiple implants and sharpening cycles.

[0260] A proximal cone portion maximal diameter 2764 may define the largest cross- sectional dimension within the tapered region that provides initial implant engagement at the opening of the implant sharpening cavity 2704. The proximal cone portion maximal diameter 2764 may be selected to provide adequate clearance for implant insertion while maintaining proper guidance and alignment characteristics during the initial positioning phase of the sharpening process. In some cases, the proximal cone portion maximal diameter 2764 may be optimized to accommodate manufacturing tolerances and dimensional variations while providing smooth transition from the external opening to the internal working regions of the implant sharpening cavity 2704. The proximal cone portion maximal diameter 2764 may be coordinated with the proximal cone portion angle 2752 and the proximal cone portion length 2750 to provide controlled insertion characteristics that facilitate proper implant positioning relative to the sharpening element 2702.

[0261] As further shown in Figures 27D and 27E, a cavity overall length 2766 may define the complete longitudinal dimension of the implant sharpening cavity 2704 from the proximal opening to the distal termination of the tapered region. The cavity overall length 2766 may encompass the proximal cone portion length 2750, the cavity straight portion length 2760, and the distal cone portion length 2756 to provide the complete dimensional specification for the internal geometry of the sharpener assembly 2700. In some cases, the cavity overall length 2766 may be selected to accommodate the full range of implant lengths encountered in the surgical system while providing adequate working space for controlled material removal and tip preparation. The cavity overall length 2766 may be optimized to balance sharpening capability with the overall dimensions of the sharpener assembly 2700, enabling effective implant preparation while maintaining compact external dimensions that facilitate integration within surgical instrument sets.

[0262] A sharpening angle 2768 may define the angular relationship between the sharpening element 2702 and the internal surfaces of the implant sharpening cavity 2704, establishing the cutting geometry that enables controlled material removal during the sharpening process. The sharpening angle 2768 may be selected to provide effective cutting action against the bioabsorbable composite materials while maintaining controlled material removal rates that prevent excessive heat generation or structural damage to the implant components. In some cases, the sharpening angle 2768 may be optimized to accommodate the fiber reinforcement characteristics of the composite materials while providing clean cutting action that maintains the integrity of the mineral fibers and polymer matrix throughout the sharpening process. The sharpening angle 2768 may be coordinated with the positioning of the sharpening element 2702 and the geometric features of the distal cone portion to provide consistent material removal characteristics that achieve the desired tip geometry and insertion performance for the sharpened implants.

[0263] The geometric relationships between the various dimensional parameters of the implant sharpening cavity 2704 may enable controlled and predictable material removal that produces consistent tip geometries across multiple sharpening operations. In some cases, the coordination between the proximal cone portion maximal diameter 2764, the cavity nominal diameter 2762, and the distal cone portion minimal diameter 2758 may provide a controlled transition that guides the implant through progressive material removal stages during the sharpening process. The angular relationships defined by the proximal cone portion angle 2752, the distal cone portion angle 2754, and the sharpening angle 2768 may work together to provide smooth material removal characteristics that minimize the potential for chipping, cracking, or other damage to the composite materials. The longitudinal dimensions including the cavity overall length 2766, the cavity straight portion length 2760, and the cone portion lengths may provide adequate working space for controlled implant manipulation while maintaining structural integrity of the sharpener assembly 2700 throughout repeated use cycles.

[0264] The overall length of the sharpener may be implemented according to a variety of suitable ranges, including but not limited to optionally 10-100 mm, preferably 20-70 mm and more preferably 30-40 mm. The overall width of the sharpener may be implemented according to a variety of suitable ranges, including but not limited to optionally 10-100 mm, preferably 20-70 mm and more preferably 30-40 mm. The overall height of the sharpener may be implemented according to a variety of suitable ranges, including but not limited to optionally 5-60 mm, preferably 10-40 mm and more preferably 20-30 mm. The sharpener weight may be implemented according to a variety of suitable ranges, including but not limited to optionally 15-1000 gr, preferably 50-500 gr and more preferably 100-300 gr.

[0265] The distal cone portion length of the sharpener may be implemented according to a variety of suitable ranges, including but not limited to optionally 1.0-15 mm, preferably 3.0- 10 mm and more preferably 5.0-7.0 mm. The distal cone portion angle of the sharpener may be implemented according to a variety of suitable ranges, including but not limited to optionally 1.0-20 degrees, preferably 3.0-15 degrees and more preferably 6.0-8.0 degrees. The distal cone portion minimal diameter of the sharpener may be implemented according to a variety of suitable ranges, including but not limited to optionally 1.0-5.0 mm, preferably 2.0-4.5 mm and more preferably 3.0-4.0 mm. The proximal cone portion length of the sharpener may be implemented according to a variety of suitable ranges, including but not limited to optionally 1.0-15 mm, preferably 3.0-10 mm and more preferably 4.0-5.0 mm. The proximal cone portion angle of the sharpener may be implemented according to a variety of suitable ranges, including but not limited to optionally 0. 1-10 degrees, preferably 0.5-5.0 degrees and more preferably 1.0-3.0 degrees.

[0266] The cavity nominal diameter of the sharpener may be implemented according to a variety of suitable ranges, including but not limited to optionally 1.5-8.0 mm, preferably 2.5- 6.5 mm and more preferably 3.7-5.8 mm. The cavity overall length of the sharpener may be implemented according to a variety of suitable ranges, including but not limited to optionally 5.0-80 mm, preferably 10-50 mm and more preferably 15-30 mm. The cavity straight portion length of the sharpener may be implemented according to a variety of suitable ranges, including but not limited to optionally 4.0-75 mm, preferably 8.0-40 mm and more preferably 12-25 mm. The sharpening angle of the sharpener may be implemented according to a variety of suitable ranges, including but not limited to optionally 1.0-20 degrees, preferably 3.0-15 degrees and more preferably 6.0-8.0 degrees. The proximal cone portion maximal diameter of the sharpener may be implemented according to a variety of suitable ranges, including but not limited to optionally 1.6-8.5 mm, preferably 2.6-7.0 mm and more preferably 3.8-6.2 mm.

[0267] The comprehensive surgical instrument system may be configured to provide integrated functionality between the adjustable length drivers, implant sharpening tools, and fiber-reinforced fully threaded implants through coordinated design features and compatible interfaces. The system integration may enable seamless workflow transitions between implant preparation, driver configuration, and insertion procedures while maintaining consistent performance characteristics across all components. In some cases, the integrated design approach may facilitate efficient surgical procedures by providing surgeons with a complete set of compatible instruments that work together to address various bone fixation requirements. The functional relationships between system components may be optimized to reduce the complexity of surgical workflows while providing flexibility for customized approaches to individual patient anatomy and procedural requirements.

[0268] The driver systems may incorporate self-retaining features that enable secure implant engagement and positioning throughout various surgical orientations and procedural phases. These self-retaining capabilities may be particularly beneficial during complex surgical procedures where the driver orientation may change frequently or where the surgical approach requires the driver to be positioned at various angles relative to the surgical site. In some cases, the self-retaining features may eliminate the need for additional holding instruments or manual support during implant insertion procedures, potentially improving surgical efficiency and reducing the number of instruments required for individual procedures. The self-retaining functionality may be designed to accommodate the cannulated design of the threaded implants while maintaining compatibility with the adjustable length mechanisms incorporated within the driver systems.

[0269] The shaft components within the driver systems may incorporate specialized features that enable controlled engagement with the internal surfaces of the cannulated implants, providing mechanical retention that maintains implant positioning relative to the driver throughout various operational orientations. These shaft-based retention features may be configured to engage with the non-circular portions of the implant cannulation, creating mechanical interference that prevents unintended separation between the driver and implant during surgical manipulation. In some cases, the shaft retention features may be designed to provide graduated engagement force that increases with insertion depth, ensuring that the implant remains securely positioned on the driver while enabling controlled release when the implant reaches the desired insertion position within the bone tissue.

[0270] The sleeve components may alternatively or additionally incorporate retention features that provide implant engagement through external contact with the implant surfaces or through interaction with the implant threading characteristics. The sleeve-based retention approach may enable implant retention through controlled compression or mechanical interference that maintains implant positioning without requiring deep insertion of retention elements into the implant cannulation. In some cases, the sleeve retention features may be configured to accommodate various implant diameters and thread configurations while providing consistent retention force characteristics across different implant sizes within the surgical system. The sleeve retention mechanisms may be designed to provide reliable engagement while enabling smooth release of the implant when the insertion procedure may be completed.

[0271] The self-retaining features may be configured to function effectively across all driver orientations encountered during surgical procedures, including vertical, horizontal, and angled positioning that may be required for different surgical approaches and anatomical access requirements. The retention mechanisms may be designed to maintain secure implant engagement regardless of gravitational forces or dynamic loading conditions that may be encountered during surgical manipulation and positioning procedures. In some cases, the selfretaining features may incorporate spring-loaded elements or flexible components that automatically adjust to maintain consistent retention force as the driver orientation changes throughout the surgical procedure. The retention capability may be maintained during rapid movements or repositioning actions that may be required for efficient surgical workflows and optimal implant placement.

[0272] The integration between the driver systems and the sharpening tools may be facilitated through compatible dimensional specifications and interface features that enable efficient transition between implant preparation and insertion procedures. The sharpened implants may be configured to engage directly with the driver retention features without requiring additional adaptation or interface components, enabling seamless workflow progression from sharpening to insertion phases of the surgical procedure. In some cases, the sharpening process may be designed to preserve or enhance the engagement characteristics between the implant and the driver retention features, ensuring that the sharpening operations do not compromise the mechanical interface required for secure implant retention during insertion procedures.

[0273] The system integration may extend to the coordination of dimensional tolerances and geometric specifications across all components to ensure consistent performance and compatibility throughout the complete surgical workflow. The implant cannulation geometries may be coordinated with the driver shaft configurations to provide optimal engagement characteristics while accommodating the manufacturing tolerances and material properties of the bioabsorbable composite materials. In some cases, the retention force characteristics may be calibrated to provide adequate holding capability for surgical manipulation while enabling controlled release when appropriate insertion forces may be applied during the implant placement procedure. The integrated design approach may enable optimization of individual component characteristics to enhance overall system performance rather than optimizing components in isolation.

[0274] The self-retaining functionality may incorporate multiple engagement mechanisms that work together to provide comprehensive retention capability across various operational conditions and procedural requirements. The combination of shaft-based and sleeve-based retention features may provide redundant engagement that ensures reliable implant positioning even if individual retention mechanisms may be compromised during surgical procedures. In some cases, the multiple retention approaches may be configured to engage sequentially as the implant may be positioned on the driver, providing progressive increase in retention force that corresponds to the depth of engagement between the driver and implant components. The multi -mechanism approach may enable customization of retention characteristics for different implant sizes and surgical applications while maintaining consistent operational procedures for surgical personnel.

[0275] The retention features may be designed to accommodate the unique characteristics of the fiber-reinforced bioabsorbable composite materials incorporated within the threaded implants, including the potential for material deformation or surface texture variations that may affect engagement characteristics. The retention mechanisms may be configured to provide secure engagement without causing damage to the composite materials or compromising the structural integrity of the implant components during retention and release procedures. In some cases, the retention features may be designed to distribute engagement forces over adequate surface areas to prevent localized stress concentrations that could cause cracking or delamination of the composite materials. The retention system design may incorporate material compatibility considerations that account for the mechanical properties and surface characteristics of the bioabsorbable composite formulations used in the implant construction.

[0276] The functional relationships between the driver systems, sharpening tools, and implants may enable surgical personnel to customize the complete surgical approach according to specific procedural requirements and patient anatomy while maintaining consistent instrument interfaces and operational procedures. The system integration may facilitate training and familiarization for surgical teams by providing standardized operational procedures that apply across different component combinations and surgical applications. In some cases, the integrated system design may enable efficient instrument inventory management by reducing the number of different interface types and connection methods required for various surgical procedures and implant configurations. The comprehensive system approach may provide surgical teams with flexibility in procedural planning while maintaining the reliability and performance characteristics required for successful bone fixation outcomes.

[0277] Non-limiting Examples of Suitable Materials

[0278] The medical implant described herein may be made from any biodegradable polymer. The biodegradable polymer may be a homopolymer or a copolymer, including random copolymer, block copolymer, or graft copolymer. The biodegradable polymer may be a linear polymer, a branched polymer, or a dendrimer. The biodegradable polymers may be of natural or synthetic origin. Examples of suitable biodegradable polymers include, but are not limited to polymers such as those made from lactide, glycolide, caprolactone, valerolactone, carbonates (e.g., trimethylene carbonate, tetramethylene carbonate, and the like), dioxanones (e.g., 1,4-dioxanone), 5-valerolactone, l,dioxepanones )e.g., l,4-dioxepan-2-one and 1,5- dioxepan-2-one), ethylene glycol, ethylene oxide, esteramides, y-ydroxy valerate, P- hydroxypropionate, alpha-hydroxy acid, hydroxybuterates, poly (ortho esters), hydroxy alkanoates, tyrosine carbonates , polyimide carbonates, polyimino carbonates such as poly (bisphenol A-iminocarbonate) and poly (hydroquinoneiminocarbonate, (polyurethanes, polyanhydrides, polymer drugs (e.g., polydiflunisol, polyaspirin, and protein therapeutics(and copolymers and combinations thereof. Suitable natural biodegradable polymers include those made from collagen, chitin, chitosan, cellulose, poly (amino acids), polysaccharides, hyaluronic acid, gut, copolymers and derivatives and combinations thereof.

[0279] According to the present invention, the biodegradable polymer may be a copolymer or terpolymer, for example: poly lactides (PLA), poly-L-lactide (PLLA), poly-DL-lactide (PDLLA), poly-LD-lactide (PLDLA); polyglycolide (PGA); copolymers of glycolide, glycolide / trimethylene carbonate copolymers (PGA / TMC); other copolymers of PLA, such as lactide / tetramethylglycolide copolymers, lactide / trimethylene carbonate copolymers, lactide / d-valerolactone copolymers, lactidc / s-caprolactonc copolymers, L-lactide / DL-lactide copolymers, glycolide / Llactide copolymers (PGA / PLLA), polylactide-co-glycolide; terpolymers of PLA, such as lactide / glycolide / trimethylene carbonate terpolymers, lactide / glycolide / a caprolactone terpolymers, PLA / polyethylene oxide copolymers; polydepsipeptides; unsymmetrically - 3,6-substituted poly-1 ,4-dioxane-2, 5-diones; polyhydroxyalkanoates; such as polyhydroxybutyrates (PHB); PHB / bhydroxyvalerate copolymers (PHB / PHV); poly-b-hydroxypropionate (PHPA); poly-pdioxanone (PDS); poly- d-valerolactone - poly-s-capralactonc. poly(8-caprolactoneDL-lactide) copolymers; methylmethacrylate -N-vinyl pyrrolidone copolymers; polyesteramides; polyesters of oxalic acid; poly dihydropyrans; polyalkyl-2-cyanoacrylates; polyurethanes (PU); polyvinylalcohol (PV A); polypeptides; poly-b-malic acid (PMLA): poly-b-alkanbic acids; polycarbonates; polyorthoesters; polyphosphates; poly(ester anhydrides); and mixtures thereof; and natural polymers, such as sugars; starch, cellulose and cellulose derivatives, polysaccharides, collagen, chitosan, fibrin, hyalyronic acid, polypeptides and proteins. Mixtures of any of the above-mentioned polymers and their various forms may also be used. Preferably polymer is PLDLA and ratio of L isomer to D isomer is in the range of 60:40, L:D to 99: 1, L:D, and more preferably, the ratio is between 70:30 and 96:4.

[0280] Reinforced Bioabsorbable Polymers

[0281] According to at least some embodiments of the present invention, the medical implant comprises a reinforced bioabsorbable polymer (i.e. a bioabsorbable composite that includes the previously described polymer and also incorporates a reinforcing fdler, generally in fiber form, to increase the mechanical strength of the polymer).

[0282] In a more preferred embodiment of the present invention, the reinforced bioabsorbable polymer is a reinforced polymer composition comprised of any of the above- mentioned bioabsorbable polymers and a reinforcing filler, preferably in fiber form. The reinforcing filler may be comprised of organic or inorganic (that is, natural or synthetic) material. Reinforcing filler may be a biodegradable glass, a cellulosic material, a nanodiamond, or any other filler known in the art to increase the mechanical properties of a bioabsorbable polymer. The filler is preferably made from a material or class of material other than the bioabsorbable polymer itself. However, it may also optionally be a fiber of a bioabsorbable polymer itself.

[0283] Numerous examples of such reinforced polymer compositions have previously been documented. For example: A biocompatible and resorbable melt derived glass composition where glass fibers can be embedded in a continuous polymer matrix (EP 2 243 749 Al), Biodegradable composite comprising a biodegradable polymer and 20-70 vol% glass fibers (W02010128039 Al), Resorbable and biocompatible fiber glass that can be embedded in polymer matrix (US 2012 / 0040002 Al), Biocompatible composite and its use (US 2012 / 0040015 Al), Absorbable polymer containing polyfsuccinimide] as a filler (EP0 671177 Bl).

[0284] In a more preferred embodiment of the present invention, the reinforcing filler is bound to the bioabsorbable polymer such that the reinforcing effect is maintained for an extended period. Such an approach has been described in US 2012 / 0040002 Al and EP 2243500B1, which discusses a composite material comprising biocompatible glass, a biocompatible matrix polymer and a coupling agent capable of forming covalent bonds.

[0285] Preferably, a sizer or compatibilizer is included in the biocomposite implant composition to increase the bond between the polymer and the fiber. Preferably, such compatibilizer or sizer makes up <1 % of the overall implant composition by weight and / or by volume. Preferably, such compatibilizer or sizer makes up <0.5% but weight and / or by volume. Most preferably, such compatibilizer or sizer makes up <0.3% by weight and / or by volume.

[0286] Preferably, the majority of said compatibilizer or sizer is comprised of a bioabsorbable polymer selected from above-mentioned list of absorbable polymers. Preferably, the polymer within the sizer is of a different composition, intrinsic viscosity, or average molecular weight than the bioabsorbable polymer comprising the polymeric structural component of the implant. Such a compatibilizer is preferably a lower molecular weight (shorter chain) than the polymeric structural component of the implant. Non-limiting examples of such a compatibilizer are given in W02010122098, hereby incorporated by reference as if fully set forth herein. For example, optionally the compatibilizer comprises a polymer wherein at least 10% of the structural units of the compatibilizer are identical to the structural units of the structural polymer, and the molecular weight of the compatibilizer is less than 30000 g / mol. Optionally, at least 30 % of the structural units of the compatibilizer are identical to the structural units of the structural polymer and the molecular weight of the compatibilizer is less than 10000 g / mol. More preferably the molecular weight of the compatibilizer is less than 10000 g / mol. Alternatively, 0% of the structural units of the compatibilizer are identical to the structural units of the structural polymer.

[0287] The biodegradable composite is preferably embodied in a polymer matrix, which may optionally comprise any of the above polymers. Optionally and preferably, it may comprise a polymer selected from the group consisting of PLLA (poly-L-lactide), PDLLA (poly-DL- lactide), PLDLA, PGA (poly-glycolic acid), PLGA (polylactide -glycolic acid), PCL (Poly caprolactone), PLLA -PCL and a combination thereof. If PLLA is used, the matrix preferably comprises at least 30% PLLA, more preferably 50%, and most preferably at least 70% PLLA. If PLDLA is used, the matrix preferably comprises at least 5% PLDLA, more preferably at least 10%, most preferably at least 20% PLDLA.

[0288] Preferably, the inherent viscosity (IV) of the polymer matrix (independent of the reinforcement fiber) is in the range of 1.2 to 2.4 dl / g, more preferably in the range of 1.5 to 2.1 dl / g.

[0289] Inherent Viscosity (IV) is a viscometric method for measuring molecular size. IV is based on the flow time of a polymer solution through a narrow capillary relative to the flow time of the pure solvent through the capillary. Preferably, the average molecular weight of the polymer matrix, as measured by GPC, is in the range of 100 kDa - 400 kDa. More preferably, the average molecular weight is in the range of 120 kDa - 250 kDa. Most preferably, the average molecular weight is in the range of 150 kDa - 250 kDa. The reinforcing filler in the implants of the present invention may be comprised of organic or inorganic (that is, natural or synthetic) material. Reinforcing filler may be a biodegradable glass, a cellulosic material, a nano-diamond, or any other filler known in the art to increase the mechanical properties of a bioabsorbable polymer. The filler is preferably made from a material or class of material other than the bioabsorbable polymer itself. However, it may also optionally be a fiber of a bioabsorbable polymer itself. Numerous examples of such reinforced polymer compositions have previously been documented. For example: A biocompatible and resorbable melt derived glass composition where glass fibers can be embedded in a continuous polymer matrix (EP 2 243 749 Al), Biodegradable composite comprising a biodegradable polymer and 20-70 vol% glass fibers (W02010128039 Al), Resorbable and biocompatible fiber glass that can be embedded in polymer matrix (US 2012 / 0040002 Al), Biocompatible composite and its use (US 2012 / 0040015 Al), Absorbable polymer containing poly [succinimide] as a filler (EP0 671177 Bl).

[0290] In one embodiment of the present invention, the reinforcing filler is bound to the bioabsorbable polymer such that the reinforcing effect is maintained for an extended period. Such an approach has been described in US 2012 / 0040002 Al and EP 2243500B1, which discusses a composite material comprising biocompatible glass, a biocompatible matrix polymer and a coupling agent capable of forming covalent bonds.

[0291] In one embodiment of the present invention, the biodegradable composite and fibers are preferably arranged in the form of biodegradable composite fiber bundles, where each bundle comprises unidirectionally aligned continuous reinforcement fibers embedded in a polymer matrix comprised of one or more bioabsorbable polymers, see for example WO 2019 / 123462 the entire content of which are incorporated herein by reference.

[0292] In one embodiment, the reinforcement fiber is comprised of silica-based mineral compound such that reinforcement fiber comprises a bioresorbable glass fiber, which can also be termed a bioglass fiber composite.

[0293] Bioresorbable mineral fiber may optionally have oxide compositions in the following mol. % ranges:

[0294] Na2O: 10.0 - 19.0 mol. %

[0295] CaO: 9.0-14.0mol.%

[0296] MgO: 1.5 - 8.0 mol. % B2O3: 0.5 - 3.0 mol. % AhCh: 0 - 0.8 mol. % P2O3: 0.1 -0.8 mol%

[0297] SiCh: 67 - 73 mol. %

[0298] And more preferably in the following mol. % ranges:

[0299] Na2O: 11.5 - 13.0 mol. %

[0300] CaO: 9.0 - 10.0 mol. %

[0301] MgO: 7.0- 8.0 mol.%

[0302] B2O3: 1.4 - 2.0 mol. %

[0303] P2O3: 0.5 - 0.8 mol. %

[0304] SiCh: 67 - 70 mol. %

[0305] K2O: 0 - 0.4 mol. %

[0306] Alternatively, above mineral composition ranges are applicable as weight% (w / w) rather than as mol%.

[0307] Additional optional glass fiber compositions have been described previously by Lehtonen TJ et al. (Acta Biomaterialia 9 (2013) 4868-4877), which is included here by reference in its entirety; such glass fiber compositions may optionally be used in place of or in addition to the above compositions.

[0308] Additional optional bioresorbable glass compositions are described in the following patent applications, which are hereby incorporated by reference as if fully set forth herein: Biocompatible composite and its use (W02010122098); and Resorbable and biocompatible fiber glass compositions and their uses (W02010122019).

[0309] In one embodiment of the preset invention, the fibers are continuous fibers, “continuous fibers” as used herein are single uninterrupted fibers that extend continuously through a specific length of the implant. These fibers can be of any length that is longer than a nominal particle but generally would be a length greater than 1 mm, 3 mm, or 5 mm.

[0310] As used herein, "plurality” is more than one fiber of the same or similar orientation. In one embodiment the plurality of fibers are of the same or similar length. In one embodiment, pluralities of fibers form at least 10%, 20 or 30% of the overall number of fibers in a particular cross-section of the implants of the present invention.

[0311] In one embodiment of the implants of the present invention, fibers run along the entire span of the implant. In another embodiment, a majority of the fibers are aligned along the entire span of the implant. In yet another embodiment, all of the fibers are aligned along the entire span of the implant. In yet another embodiment, 10 to 90%, 30-80%, or 50 to 75% of fibers are aligned along the entire span of the implant. In one embodiment of the implants of the present invention, the angle between fibers aligned along the entire span of the implant is less than 15 degrees, less than 10 degrees, or less than 5 degrees between each other.

[0312] In one embodiment of the implants of the present invention, the number of fibers running across a cross-sectional area of a leg of the implant is in the range of 1-150K, 5k- 100K, or 7k-70K.

[0313] In one embodiment of the implants of the present invention, the fibers are “full length fibers” which run completely along the entire span of the implant. In one embodiment of the implants of the present invention, for the full-length fibers “completely” means they run along 100%, at least 99%, at least 98%, at least 95% or at least 90% of the entire span of the implant.

[0314] In one embodiment of the implants of the present invention, the density of the biocomposite composition between 1 to 2 g / mL, 1.2 to 1.9 g / mL, or 1.4 to 1.8 g / mL.

[0315] In one embodiment of the implants of the present invention, the bioabsorbable mineral fibers are comprised of between 50 and 100%, 70 and 100%, or 80 and 100% longitudinal fibers.

[0316] In one embodiment of the implants of the present invention the longitudinal fibers are between 10 mm and 150 mm, 30 mm and 100 mm, or 60 mm and 75 mm in length.

[0317] In one embodiment of the implants of the present invention the bioabsorbable mineral fibers are comprised of between 0 and 50%, 0 and 30%, or 0 and 30% helical fibers.

[0318] In one embodiment of the implants of the present invention the helical fibers are between 50 mm and 1000 mm, 100 mm and 750 mm, or 200 mm and 300 mm in length.

[0319] In one embodiment of the implants of the present invention a winding angle of the helical fibers is between 3 and 45 degrees, 5 and 30 degrees, or 8 and 20 degrees.

[0320] Optionally, the mineral content of the external threads on the wall is between 10 and 40, 15 and 35, or 20 and 35 % lower than the mineral content of the implant body entire composition.

[0321] Various features of these compositions are shown in the table below.

[0322] The material fibers used in the implant system may include both straight and wound fibers. The percentage of straight fibers may range from optionally50% to 100%, preferably 70% to 100%, and more preferably 80% to 100%.

[0323] The percentage of wound fibers may range from optionally 0% to 50%, preferably 0% to 30%, and more preferably 0% to 20%.

[0324] The implant may include a continuous fiber length for winding that optionally ranges from 50 mm to 1000 mm, preferably 100 mm to 750 mm, or more preferably 200 mm to 300 mm. Similarly, the continuous fiber length along the implant axis may optionally range from 10 mm to 150 mm, preferably from 30 mm to 100 mm, or more preferably from 60 mm to 75 mm.

[0325] In some embodiments, the implant comprises a core with a portion of increased diameter. The percentage of this increased-diameter portion that contains additional fibers may optionally range from 5% to 30%, preferably from 1% to 20%, or more preferably from 2% to 10%.

[0326] The winding angle of fibers on the increased core portion may optionally range from 5 degrees to 30 degrees, or preferably from 8 degrees to 20 degrees. The winding angle on the core of the implant may optionally range from 3 degrees to 45 degrees, preferably from 5 degrees to 30 degrees, or more preferably from 8 degrees to 20 degrees. EXAMPLES

[0327] Example 1

[0328] Below example describes the production of a fully threaded cannulated implant with reinforced biocomposite materials. This example demonstrates how a medical implant comprised of reinforced biocomposite materials can have beneficial performance properties with regard to flexural force, torsional force and compression force relating to its compositional structure of straight and winded reinforcing mineral fibers. Specifically, the feature of having a progressive, variable pitch over 20mm of the proximal end of the implants results in the implant applying compressive force in a simulated bone fixation model. A similar implant without the variable pitch feature applies much less compressive force even though the core diameter, including increased core diameter on the proximal side, are the same between both implants. The constant thread over the remaining 50mm of the implant allows the implant to be cut at any point along the constant thread area without adversely impacting the compression.

[0329] Materials & Methods

[0330] Fully threaded cannulated implants of dimensions appropriate for small bone fixation (4.5mm OD (outside diameter), 2mm ID (internal diameter), 70mm length, 0.5mm thread height), were produced using reinforced composite material. Material composite was comprised of PLDLA 70 / 30 polymer reinforced with 40% - 50% w / w continuous mineral fibers. Mineral composition was specifically approximately Na2O 14%, MgO 5.4%, CaO 9%, B2O3 2.3%, P2O5 1.5%, and SiCh 67.8% w / w. Testing samples were manufactured by compression molding of 2-4 layers of straight composite material into a rectangular / tubular mold with 2mm hexagonal pin insert with composite material pre-winded over, with 1-5 winding layers, each comprised of the PLDLA polymer with embedded uni-directionally aligned continuous fibers. Orientation of winded layers to longitudinal axis of implant were 10°-25° and 160-175°. Each layer was 0.18 mm thick. Thirty (30) fully threaded cannulated implant samples were produced.

[0331] Samples were divided into two groups:

[0332] Group A - samples produced with straight and winded biocomposite material complex, with proximal progressive thread, gradually increase from 1.0mm to 2.0mm over 20mm, and a distal constant thread of 2.0mm over the remaining 50mm, and increased proximal core diameter from 3.7mm to 4.0mm over proximal 10mm. Group B - Samples produced mostly with straight biocomposite material, with constant thread of 2.0mm, and increased proximal core diameter from 3.7mm to 4.2mm over proximal 10mm.

[0333] Implant samples were tested in a tensile testing system (220Q 1125-95, TestResources, MN, USA) for maximum load, flexural strength and elastic modulus according to modified ASTM D790 using a 500N load cell and an appropriate fixture for three point bending testing. The tested span was 52 mm at the beginning of the test and cross head speed was set at 5 mm / min. Dimensions and weight of samples were recorded.

[0334] Implant samples were tested in a torque testing system (160 GT20, TestResources, MN, USA) for maximum torque according to ASTM F2502 using a 500N load cell and an appropriate fixture for torque to failure testing. Sample fixation was 10 mm from each side at the beginning of the test and cross head speed was set at 5 mm / min. Dimensions and weight of samples were recorded.

[0335] Implant samples were tested in a compression testing setup (using compression force sensor AUW1 Hitec Sensors) for steady-state compression force using a lOOKgf compression sensor and an appropriate fixture for compression testing. Dimensions and weight of samples were recorded.

[0336] Results

[0337] Table 1-3 shows the mechanical performance results of reinforced composites implants produced as described above. The structural properties of these implants are described by the production methods discussed above. Without wishing to be limited by a single hypothesis, it is believed that the internal structure and external features of these implants seen in this example (Example 1) was the cause or at least a significantly contributing factor for the following results: Table 1 : Mean values and standard deviations of the flexural properties of the implants (n=10).

[0338] Table 2: Mean values and standard deviations of the torque properties of the implants (n=10).

[0339] Table 3 : Mean value and standard deviation of the compression property of the implants (n=10).

[0340] In one embodiment the implants of the present invention are made using manufacturing methods described in WO 2019 / 049062, the entire contents of which are incorporated by reference.

[0341] It will be appreciated that various features of the invention which are, for clarity, described in the contexts of separate embodiments may also be provided in combination in a single embodiment. Conversely, various features of the invention which are, for brevity, described in the context of a single embodiment may also be provided separately or in any suitable sub-combination. It will also be appreciated by persons skilled in the art that the present invention is not limited by what has been particularly shown and described hereinabove. Rather the scope of the invention is defined only by the claims which follow.

[0342] A number of implementations have been described. Nevertheless, it will be understood that various modifications may be made without departing from the spirit and scope of the disclosure. Accordingly, other implementations are within the scope of the following claims.

Claims

1. What is claimed is:

1. A fully threaded cannulated implant comprising: a cannulated shaft having a wall surrounding at least one cannula, wherein a thickness of the wall is at least 0.5 mm; wherein said shaft comprises: a) a distal end and a proximal end; wherein the distal end comprises at least 40% of the length of the implant and comprises an external thread at a constant pitch; and wherein the proximal end comprises at least 10% of the length of the implant and comprises an external thread at a progressive or differential pitch; b) a plurality of bioabsorbable mineral fibers and a polymer matrix; wherein said mineral fibers comprise a plurality of helical fibers and a plurality of longitudinal fibers; wherein at least 20% of the length of said at least one cannula is non-circular; and wherein at least one width of said non-circular portion of the at least one cannula is at least 1.5 mm.

2. The implant of claim 1, wherein the thickness of the wall is between 0.3-2 mm, 0.4-1 mm, or 0.5-0.8 mm.

3. The implant of any of the above claims, wherein the length of the implant is between 15 mm and 100 mm, 30 mm and 85 mm, or 60 mm and 70 mm.

4. The implant of any of the above claims, wherein a length of the distal end is between 10 mm and 100 mm, 25 mm and 85 mm, or 45 mm and 55 mm.

5. The implant of any of the above claims, wherein a length of the distal end is between 40-100%, 50-90%, or 70-80% of the length of the implant.

6. The implant of any of the above claims, wherein a length of the proximal end is between 3 mm and 100 mm, 7 mm and 75 mm, or 10 mm and 20 mm.

7. The implant of any of the above claims, wherein a length of the proximal end is between 10-60%, 10-50%, or 15-30% of the length of the implant.

8. The implant of any of the above claims, wherein the ratio of a length of the distal end to a length of the proximal end is between 1:0.05 and 20: 1, 2: 1 and 10: 1, or 3: 1 and 6: 1.

9. The implant of any of the above claims, wherein a progressive pitch reduction at the proximal end is between 5-80%, 20-70%, or 45-55% compared with the distal end.

10. The implant of claim 9, wherein the ratio of the minimum to the maximum pitch in the proximal end is between 0.05:0.8, 0.2:0.7, or 0.45:0.55.

11. The implant of any of the above claims, wherein the external thread comprises more than one pitch, including a first pitch and a second pitch that is unequal to the first pitch, wherein the second pitch may be a predetermined fraction of the first pitch or the first pitch may be an integer multiple of the second pitch.

12. The implant of any of the above claims, wherein the external thread has a variable pitch that changes at a regular or irregular rate, a progressive pitch that increases or decreases gradually at a regular rate, or a differential and variable pitch combining multiple pitch types, wherein the variable pitch region has a pitch differential reduction between 5-80%, 20-70%, or 45-55%.

13. The implant of any of the above claims, wherein the thread pitch is differential and variable, with the ratio of minimum to maximum pitch being between 0.05:0.8, 0.2:0.7, or 0.45:0.55.

14. The implant of any of the above claims, wherein a core diameter of the implant is between 2.5 mm and 6.0 mm, 3 mm and 4.5 mm, or 3.5 mm and 3.8 mm.

15. The implant of any of the above claims, wherein a core diameter of a portion of the proximal end of the implant is greater than a core diameter of a portion of the distal end of the implant.

16. The implant of any of the above claims, wherein a core diameter of the implant at a portion of the proximal end is between 0.05 mm and 1.5 mm, 0. 1 mm and 1 mm, or 0.2 mm and 0.5 mm greater than a core diameter of a portion of the distal end of the implant.

17. The implant of any of the above claims, wherein a core diameter of the implant at a portion of the proximal end is between 1-30%, 2-20%, or 3-15% greater than a core diameter of a portion of the distal end of the implant.

18. The implant of any of the above claims, wherein a threaded diameter of the implant at a portion of the proximal end is between 0.1-10%, 0.5-7.5%, or 1-5% greater than a threaded diameter of a portion of the distal end of the implant.

19. The implant of any of the above claims, wherein the wall tapers outwardly from the cannula at either the distal or proximal end so that the thread and / or core diameter becomes larger at either end of the shaft when compared with the thread and / or core diameter at the opposite end of the shaft.

20. The implant of claim 19, wherein a portion of the proximal end with a threaded diameter greater than a threaded diameter of a portion of the distal end of the implant is between 0 and 100 mm, 5 and 50 mm, or 10 and 20 mm in length.

21. The implant of any of claims 19-20, wherein a portion of the distal end of the implant with a thread diameter smaller than a thread diameter of the proximal end of the implant is between 0 and 100 mm, 5 and 50 mm, or 10 and 20 mm in length.

22. The implant of any of claims 19-21, wherein a tapered cannula diameter change is between 1-20%, 1-10%, or 1-5% of the cannula diameter at its largest extent.

23. The implant of any of claims 19-22, wherein a tapered cannula angle is between 1-15 degrees, 1-10 degrees, or 1-7 degrees.

24. The implant of any of the above claims, wherein the external thread has a thread height between 0.2 and 1.5 mm, 0.3 and 0.8 mm, or 0.4 and 0.6 mm.

25. The implant of any of the above claims, wherein the external thread has a thread base width between 0.3 and 2.0 mm, 0.4 and 1.5 mm, or 0.5 and 0.8 mm.

26. The implant of any of the above claims, wherein the external thread has a thread tip width between 0.01 and 1.0 mm, 0.03 and 0.5 mm, or 0.05 and 0.15 mm.

27. The implant of any of the above claims, wherein the external thread comprises a thread leading angle between 5 and 60 degrees, 10 and 45 degrees, or 15 and 25 degrees.

28. The implant of any of the above claims, wherein the external thread comprises a thread trailing angle between 1 and 30 degrees, 3 and 20 degrees, or 5 and 15 degrees.

29. The implant of any of the above claims, wherein the external thread cross-sectional shape is selected from trapezoid, triangular, rectangular, or continuous sine peaks.

30. The implant of any of the above claims, wherein the implant is self-tapping.

31. The implant of any of the above claims, wherein a length of the at least one cannula is between 50 and 100%, 70 and 100%, or 95 and 100% of the length of the implant.

32. The implant of any of the above claims, wherein a diameter of a circular portion of the at least one cannula is between 1.0 mm and 3.5 mm, 1.5 mm and 2.8 mm, or 1.75 mm and 2.5 mm.

33. The implant of any of the above claims, wherein the at least one cannula has a tapered diameter at the proximal end or distal end of the implant.

34. The implant of claim 33, wherein a diameter of the cannula increases by between 0 and 20%, 0 and 10%, or 0 and 5% at the proximal end of the implant.

35. The implant of any of claims 33-34, wherein a diameter of the cannula increases by between 0 and 20%, 0 and 10%, or 0 and 5% at the tip of the proximal end of the implant.

36. The implant of any of claims 33-35, wherein the tapered cannula diameter change is expressed as a percentage of the cannula diameter at its largest extent and comprises between 1-20%, 1-10%, or 1-5%.

37. The implant of any of claims 33-36, wherein the tapered cannula angle is between 1- 15 degrees, 1-10 degrees, or 1-7 degrees.

38. The implant of any of the above claims, wherein a length of the non-circular portion of the at least one cannula is between 20 and 100%, 50 and 100%, or 80 and 100% of the length of the implant.

39. The implant of any of the above claims, wherein the non-circular portion of the at least one cannula is in the shape of a semicircle, oval, symmetric lens, asymmetric lens, trefoil, quatrefoil, regular polygon, irregular polygon, convex polygon, concave polygon, regular star polygon, irregular star polygon, or reuleaux polygon.

40. The implant of any of the above claims, wherein the non-circular portion of the at least one cannula is in the shape of a hexagon, pentagon, square, triangle, or star.

41. The implant of any of the above claims, further comprising internal protrusions on an internal surface of the at least one cannula.

42. The implant of claim 41, wherein the internal protrusions are positioned at the proximal end of the implant, distributed along the length of the cannula, or both.

43. The implant of claims 41-42, wherein the internal protrusions are in the shape of a sphere, tetrahedron, hexahedron, pentagonal pyramid, or triangular prism.

44. The implant of claims 41-43, wherein the internal protrusions have dimensions between 0.01 and 1.0 mm, 0.02 and 0.7 mm, or 0.1 and 0.5 mm.

45. The implant of any of the above claims, wherein the bioabsorbable mineral fibers comprise between 50 and 100%, 70 and 100%, or 80 and 100% longitudinal fibers.

46. The implant of any of the above claims, wherein the longitudinal fibers are between 10 mm and 150 mm, 30 mm and 100 mm, or 60 mm and 75 mm in length.

47. The implant of any of the above claims, wherein the bioabsorbable mineral fibers comprise between 0 and 50%, 0 and 30%, or 0 and 20% helical fibers.

48. The implant of claim 47, wherein the helical fibers are between 50 mm and 1000 mm, 100 mm and 750 mm, or 200 mm and 300 mm in length.

49. The implant of claims 47 or 48, wherein a winding angle of the helical fibers is between 3 and 45 degrees, 5 and 30 degrees, or 8 and 20 degrees.

50. The implant of any of the above claims, wherein the bioabsorbable mineral fibers comprise a glass composition including Na20 (10-19 mol%), CaO (9-14 mol%), MgO (1.5-8 mol%), B2O3(0.5-3 mol%), A12O3(0-0.8 mol%), P2O5(0.1-0.8 mol%), and Si02(67-73 mol%).

51. The implant of claim 50, wherein the glass composition comprises Na20 (11.5-13 mol%), CaO (9-10 mol%), MgO (7-8 mol%), B2O3(1.4-2 mol%), P2O5(0.5-0.8 mol%), and Si02(67-70 mol%).

52. The implant of any of the above claims, wherein the polymer matrix comprises a biodegradable polymer selected from polylactides (PLA), poly-L-lactide (PLLA), poly-DL-lactide (PDLLA), poly-LD-lactide (PLDLA), polyglycolide (PGA), polylactide-co-glycolide (PLGA), polycaprolactone (PCL), or combinations thereof.

53. The implant of claim 52, wherein the polymer matrix comprises PLDLA with an L:D ratio between 60:40 and 99: 1, or between 70:30 and 96:4.

54. The implant of any of the above claims, wherein the polymer matrix has an inherent viscosity between 1.2 and 2.4 dl / g, or between 1.5 and 2. 1 dl / g.

55. The implant of any of the above claims, wherein the implant comprises a compatibilizer or sizer making up less than 1%, less than 0.5%, or less than 0.3% by weight of the overall composition.

56. The implant of any of the above claims, wherein the implant has a density between 1 and 2 g / mL, 1.2 and 1.9 g / mL, or 1.4 and 1.8 g / mL.

57. The implant of any of the above claims, wherein the implant achieves complete bioabsorption within 24 months or 12 months.

58. The implant of any of the above claims, wherein the implant is configured as a fully threaded cannulated nail or fully threaded cannulated screw.

59. The implant of any of the above claims, wherein the implant enables trimming at any point along the constant pitch region without adversely impacting compression capability.

60. The implant of any of the above claims, wherein the external threading extends over at least 90%, 95%, 98%, or 100% of the external surface length of the implant shaft.

61. The implant of any of the above claims, wherein the distal end comprises a tip and the proximal end comprises a head, wherein either or both may be flattened.

62. A bone fixation system comprising the implant of any of the above claims and an adjustable length driver comprising: a) a shaft configured to engage with the cannulated implant; b) a sleeve positioned around at least a portion of the shaft; c) a length adjustment mechanism enabling controlled modification of an operational length of the shaft relative to the sleeve; and d) a length indicator providing visual feedback regarding the current operational configuration of the shaft.

63. The system of claim 62, wherein the driver further comprises self-retaining features enabling secure implant engagement regardless of driver orientation.

64. The system of claims 62-62, wherein the driver comprises a locking mechanism selected from a spring-loaded ball and groove system, compression locking assembly, lever-actuated system, or screw mechanism.

65. The system of any of claims 62-64, wherein the driver is cannulated with an internal channel accommodating guide wires.

66. The system of any of claims 62-65, wherein the driver comprises an AO quick connector.

67. A bone fixation system comprising the implant of any of the above claims and a sharpening tool comprising: a) a sharpener body; b) an implant sharpening cavityconfigured to receive the cannulated implant; and c) a sharpening element positioned to enable controlled material removal from the implant.

68. The system of claim 67, wherein the sharpening cavity comprises a proximal cone portion, a cavity straight portion, and a distal cone portion with defined angular geometries.

69. The system of claims 67-68, wherein the sharpening element is selected from knife configuration, whetstone configuration, thermal element, sandpaper configuration, or combinations thereof.

70. The system of any of claims 67-69, wherein the sharpening tool accommodates various implant sizes and cross-sectional geometries.

71. A comprehensive bone fixation system comprising: the implant of any of claims 1-61; the adjustable length driver of any of claims 62-66; and the sharpening tool of any of claims 67-70; wherein the components have compatible interfaces enabling seamless workflow transitions between implant preparation, driver configuration, and insertion procedures.

72. The system of claim 71, wherein dimensional specifications are coordinated across all components to ensure consistent performance characteristics.

73. The system of any of claims 71-71, wherein the driver accommodates sharpened implants without requiring additional adaptation or interface components.

74. A method of manufacturing the implant of any of claims 1-61, comprising: providing straight composite material layers comprising bioabsorbable mineral fibers aligned longitudinally within a polymer matrix; providing wound composite material layers comprising bioabsorbable mineral fibers oriented at predetermined angles; arranging multiple layers in a predetermined sequence; and compression molding the arranged layers using controlled temperature and pressure parameters.

75. The method of claim 74, wherein the method produces implants with differential pitch threading and progressive pitch characteristics.

76. The method of any of claims 74-75, wherein the compression molding uses a tubular mold with a cannulation-forming insert.

77. A method of using the system of any of claims 71-73, comprising: customizing implant tip geometry using the sharpening tool; configuring the adjustable driver toappropriate operational length; engaging the driver with the sharpened implant using self-retaining features; and inserting the implant using controlled rotational forces transmitted through the driver.

78. The method of claim 77, wherein the implant is inserted in a self-tapping manner without pre -drilling or tapping of bone.

79. The method of any of claims 77-78, wherein compression forces are generated across bone segments during insertion due to the differential or progressive pitch threading.

80. A fully threaded cannulated implant comprising: a cannulated shaft having external threading extending over at least 90% of the length of the shaft; wherein the external threading comprises at least two distinct pitch regions including: a) a first region having a first pitch that is constant; and b) a second region having a second pitch that is unequal to the first pitch; wherein the shaft comprises bioabsorbable mineral fibers embedded in a polymer matrix; wherein the differential pitch configuration enables compression force generation across bone segments during insertion; and wherein the cannulated shaft includes at least one cannula extending longitudinally through the shaft.

81. The implant of claim 80, wherein the external threading extends over at least 95%, 98%, or 100% of the length of the shaft.

82. The implant of any of claims 80-81, wherein the first region comprises at least 50%, 60%, or 70% of the length of the implant.

83. The implant of any of claims 80-82, wherein the second region comprises at least 10%, 15%, or 20% of the length of the implant.

84. The implant of any of claims 80-83, wherein the second region has a progressive pitch that decreases by between 5-80%, 20-70%, or 45-55% compared to the first pitch.

85. The implant of any of claims 80-84, wherein the ratio of minimum to maximum pitch in the second region is between 0.05:0.8, 0.2:0.7, or 0.45:0.55.

86. The implant of any of claims 80-85, wherein the second region has a variable pitch that changes continuously along its length.

87. The implant of any of claims 80-86, wherein the first region is positioned at a distal end and the second region is positioned at a proximal end of the implant.

88. The implant of any of claims 80-87, wherein the differential pitch configuration generates compression across the first region during insertion.

89. The implant of any of claims 80-88, wherein a wall thickness surrounding the at least one cannula is at least 0.5 mm, between 0.3-2 mm, or between 0.5-0.8 mm.

90. The implant of any of claims 80-89, wherein the length of the implant is between 15 mm and 100 mm, 30 mm and 85 mm, or 60 mm and 70 mm.

91. The implant of any of claims 80-90, wherein a core diameter of the implant is between 2.5 mm and 6.0 mm, 3 mm and 4.5 mm, or 3.5 mm and 3.8 mm.

92. The implant of any of claims 80-91, wherein a core diameter at the proximal end is greater than a core diameter at the distal end by between 0.05 mm and 1.5 mm, 0. 1 mm and 1 mm, or 0.2 mm and 0.5 mm.

93. The implant of any of claims 80-92, wherein a core diameter at the proximal end is between 1-30%, 2-20%, or 3-15% greater than a core diameter at the distal end.

94. The implant of any of claims 80-93, wherein the external threading has a thread height between 0.2 and 1.5 mm, 0.3 and 0.8 mm, or 0.4 and 0.6 mm.

95. The implant of any of claims 80-94, wherein the external threading has a thread leading angle between 5 and 60 degrees, 10 and 45 degrees, or 15 and 25 degrees.

96. The implant of any of claims 80-95, wherein the external threading has a thread trailing angle between 1 and 30 degrees, 3 and 20 degrees, or 5 and 15 degrees.

97. The implant of any of claims 80-96, wherein the implant is self-tapping.

98. The implant of any of claims 80-97, wherein a length of the at least one cannula is between 50 and 100%, 70 and 100%, or 95 and 100% of the length of the implant.

99. The implant of any of claims 80-98, wherein at least 20% of the length of the at least one cannula is non-circular.

100. The implant of claim 99, wherein at least one width of the non-circular portion is at least 1.5 mm, between 1.5 mm and 3 mm, or between 2 mm and 2.5 mm.

101. The implant of any of claims 99-100, wherein the non-circular portion is in the shape of a semicircle, oval, symmetric lens, asymmetric lens, trefoil, quatrefoil, regular polygon, irregular polygon, or star polygon.

102. The implant of any of claims 80-101, further comprising internal protrusions on an internal surface of the at least one cannula.

103. The implant of claim 102, wherein the internal protrusions are in the shape of a sphere, tetrahedron, hexahedron, pentagonal pyramid, or triangular prism.

104. The implant of any of claims 102-103, wherein the internal protrusions have dimensions between 0.01 and 1.0 mm, 0.02 and 0.7 mm, or 0.1 and 0.5 mm.

105. The implant of any of claims 80-104, wherein the bioabsorbable mineral fibers comprise between 50 and 100%, 70 and 100%, or 80 and 100% longitudinal fibers.

106. The implant of any of claims 80-105, wherein the bioabsorbable mineral fibers comprise between 0 and 50%, 0 and 30%, or 0 and 20% helical fibers.

107. The implant of claim 106, wherein a winding angle of the helical fibers is between 3 and 45 degrees, 5 and 30 degrees, or 8 and 20 degrees.

108. The implant of any of claims 80-107, wherein the bioabsorbable mineral fibers comprise a glass composition including Na20 (10-19 mol%), CaO (9-14 mol%), MgO (1.5-8 mol%), B2O3(0.5-3 mol%), P2O5 (0.1-0.8 mol%), and Si02(67- 73 mol%).

109. The implant of any of claims 80-108, wherein the polymer matrix comprises a biodegradable polymer selected from PLDLA, PLLA, PDLLA, PGA, PLGA, PCL, or combinations thereof.

110. The implant of claim 109, wherein the polymer matrix comprises PLDLA with an L:D ratio between 60:40 and 99: 1, or between 70:30 and 96:4.

111. The implant of any of claims 80-110, wherein the polymer matrix has an inherent viscosity between 1.2 and 2.4 dl / g, or between 1.5 and 2.1 dl / g.

112. The implant of any of claims 80-111, wherein the implant achieves complete bioabsorption within 24 months or 12 months.

113. The implant of any of claims 80-112, wherein the first region is trimmable without adversely impacting compression functionality.

114. The implant of any of claims 80-113, wherein the implant is configured as a fully threaded cannulated nail or fully threaded cannulated screw.

115. The implant of any of claims 80-114, wherein the shaft comprises a distal end with a tip and a proximal end with a head, wherein either or both may be flattened.

116. A fully threaded cannulated implant comprising : a cannulated shaft having external threading; wherein the external threading includes at least one variable pitch region where the pitch changes continuously along the length of the region; wherein the variable pitch region comprises a progressive pitch that decreases by between 5% and 80% over the length of the region; wherein the shaft comprises a composite material including bioabsorbable mineral fibers and a polymer matrix; wherein the variable pitch configuration generates compression forces during implant insertion; and wherein the shaft includes at least one cannula for guide wire accommodation.

117. The implant of claim 116, wherein the progressive pitch decreases by between 20-70% or 45-55% over the length of the variable pitch region.

118. The implant of any of claims 116-117, wherein the variable pitch region comprises at least 10%, 15%, or 20% of the length of the implant.

119. The implant of any of claims 116-118, wherein the external threading further comprises a constant pitch region having a uniform pitch along its length.

120. The implant of claim 119, wherein the constant pitch region comprises at least 50%, 60%, or 70% of the length of the implant.

121. The implant of any of claims 119-120, wherein the variable pitch region is positioned at a proximal end and the constant pitch region is positioned at a distal end of the implant.

122. The implant of any of claims 119-121, wherein the constant pitch region is trimmable without adversely impacting compression functionality.

123. The implant of any of claims 116-122, wherein the ratio of minimum to maximum pitch in the variable pitch region is between 0.05:0.8, 0.2:0.7, or 0.45:0.55.

124. The implant of any of claims 116-123, wherein the external threading extends over at least 90%, 95%, or 100% of the length of the shaft.

125. The implant of any of claims 116-124, wherein a wall thickness surrounding the at least one cannula is at least 0.5 mm, between 0.3-2 mm, or between 0.5-0.8 mm.

126. The implant of any of claims 116-125, wherein the length of the implant is between 15 mm and 100 mm, 30 mm and 85 mm, or 60 mm and 70 mm.

127. The implant of any of claims 116-126, wherein a core diameter of the implant is between 2.5 mm and 6.0 mm, 3 mm and 4.5 mm, or 3.5 mm and 3.8 mm.

128. The implant of any of claims 116-127, wherein a core diameter at a proximal end is greater than a core diameter at a distal end by between 0.05 mm and 1.5 mm, 0.1 mm and 1 mm, or 0.2 mm and 0.5 mm.

129. The implant of any of claims 116-128, wherein a core diameter at the proximal end is between 1-30%, 2-20%, or 3-15% greater than a core diameter at the distal end.

130. The implant of any of claims 116-129, wherein the external threading has a thread height between 0.2 and 1.5 mm, 0.3 and 0.8 mm, or 0.4 and 0.6 mm.

131. The implant of any of claims 116-130, wherein the external threading has a thread leading angle between 5 and 60 degrees, 10 and 45 degrees, or 15 and 25 degrees.

132. The implant of any of claims 116-131, wherein the external threading has a thread trailing angle between 1 and 30 degrees, 3 and 20 degrees, or 5 and 15 degrees.

133. The implant of any of claims 116-132, wherein the implant is self-tapping.

134. The implant of any of claims 116-133, wherein a length of the at least one cannula is between 50 and 100%, 70 and 100%, or 95 and 100% of the length of the implant.

135. The implant of any of claims 116-134, wherein at least 20% of the length of the at least one cannula is non-circular.

136. The implant of claim 135, wherein at least one width of the non-circular portion is at least 1.5 mm, between 1.5 mm and 3 mm, or between 2 mm and 2.5 mm.

137. The implant of any of claims 135-136, wherein the non-circular portion is in the shape of a semicircle, oval, symmetric lens, asymmetric lens, trefoil, quatrefoil, regular polygon, irregular polygon, or star polygon.

138. The implant of any of claims 116-137, further comprising internal protrusions on an internal surface of the at least one cannula.

139. The implant of claim 138, wherein the internal protrusions are in the shape of a sphere, tetrahedron, hexahedron, pentagonal pyramid, or triangular prism.

140. The implant of any of claims 138-139, wherein the internal protrusions have dimensions between 0.01 and 1.0 mm, 0.02 and 0.7 mm, or 0.1 and 0.5 mm.

141. The implant of any of claims 116-140, wherein the bioabsorbable mineral fibers comprise between 50 and 100%, 70 and 100%, or 80 and 100% longitudinal fibers.

142. The implant of any of claims 116-141, wherein the bioabsorbable mineral fibers comprise between 0 and 50%, 0 and 30%, or 0 and 20% helical fibers.

143. The implant of claim 142, wherein a winding angle of the helical fibers is between 3 and 45 degrees, 5 and 30 degrees, or 8 and 20 degrees.

144. The implant of any of claims 116-143, wherein the bioabsorbable mineral fibers comprise a glass composition including Na20 (10-19 mol%), CaO (9-14 mol%), MgO (1.5-8 mol%), B2O3(0.5-3 mol%), P2O5 (0.1-0.8 mol%), and Si02(67- 73 mol%).

145. The implant of any of claims 116-144, wherein the polymer matrix comprises a biodegradable polymer selected from PLDLA, PLLA, PDLLA, PGA, PLGA, PCL, or combinations thereof.

146. The implant of claim 145, wherein the polymer matrix comprises PLDLA with an L:D ratio between 60:40 and 99: 1, or between 70:30 and 96:4.

147. The implant of any of claims 116-146, wherein the polymer matrix has an inherent viscosity between 1.2 and 2.4 dl / g, or between 1.5 and 2.1 dl / g.

148. The implant of any of claims 116-147, wherein the implant achieves complete bioabsorption within 24 months or 12 months.

149. The implant of any of claims 116-148, wherein the implant is configured as a fully threaded cannulated nail or fully threaded cannulated screw.

150. The implant of any of claims 116-149, wherein the shaft comprises a distal end with a tip and a proximal end with a head, wherein either or both may be flattened.

151. A fully threaded cannulated implant comprising : a cannulated shaft having external threading comprising: a) a constant pitch region having a uniform pitch along its length; b) a differential pitch region having a pitch different from the constant pitch region; and c) a variable pitch region where the pitch changes progressively along its length;wherein the combination of constant, differential, and variable pitch regions enables selective compression application and implant trimming capability; wherein the shaft comprises bioabsorbable mineral fibers including helical and longitudinal fiber orientations embedded in a biodegradable polymer matrix; and wherein the shaft includes at least one cannula with at least a portion having a non-circular cross-section.

152. The implant of claim 151, wherein the constant pitch region comprises at least 50%, 60%, or 70% of the length of the implant.

153. The implant of any of claims 151-152, wherein the differential pitch region comprises at least 10%, 15%, or 20% of the length of the implant.

154. The implant of any of claims 151-153, wherein the variable pitch region comprises at least 5%, 10%, or 15% of the length of the implant.

155. The implant of any of claims 151-154, wherein the variable pitch region has a progressive pitch that decreases by between 5-80%, 20-70%, or 45-55% over the length of the region.

156. The implant of any of claims 151-155, wherein the ratio of minimum to maximum pitch in the variable pitch region is between 0.05:0.8, 0.2:0.7, or 0.45:0.55.

157. The implant of any of claims 151-156, wherein the constant pitch region is positioned at a distal end, the differential pitch region is positioned at an intermediate location, and the variable pitch region is positioned at a proximal end.

158. The implant of any of claims 151-157, wherein the constant pitch region is trimmable without losing compression functionality.

159. The implant of any of claims 151-158, wherein the combination of pitch regions generates compression across the constant pitch region during insertion.

160. The implant of any of claims 151-159, wherein the external threading extends over at least 90%, 95%, or 100% of the length of the shaft.

161. The implant of any of claims 151-160, wherein a wall thickness surrounding the at least one cannula is at least 0.5 mm, between 0.3-2 mm, or between 0.5-0.8 mm.

162. The implant of any of claims 151-161, wherein the length of the implant is between 15 mm and 100 mm, 30 mm and 85 mm, or 60 mm and 70 mm.

163. The implant of any of claims 151-162, wherein a core diameter of the implant is between 2.5 mm and 6.0 mm, 3 mm and 4.5 mm, or 3.5 mm and 3.8 mm.

164. The implant of any of claims 151-163, wherein a core diameter at a proximal end is greater than a core diameter at a distal end by between 0.05 mm and 1.5 mm, 0.1 mm and 1 mm, or 0.2 mm and 0.5 mm.

165. The implant of any of claims 151-164, wherein a core diameter at the proximal end is between 1-30%, 2-20%, or 3-15% greater than a core diameter at the distal end.

166. The implant of any of claims 151-165, wherein the external threading has a thread height between 0.2 and 1.5 mm, 0.3 and 0.8 mm, or 0.4 and 0.6 mm.

167. The implant of any of claims 151-166, wherein the external threading has a thread leading angle between 5 and 60 degrees, 10 and 45 degrees, or 15 and 25 degrees.

168. The implant of any of claims 151-167, wherein the external threading has a thread trailing angle between 1 and 30 degrees, 3 and 20 degrees, or 5 and 15 degrees.

169. The implant of any of claims 151-168, wherein the implant is self-tapping.

170. The implant of any of claims 151-169, wherein at least 20% of the length of the at least one cannula has a non-circular cross-section.

171. The implant of claim 170, wherein at least one width of the non-circular portion is at least 1.5 mm, between 1.5 mm and 3 mm, or between 2 mm and 2.5 mm.

172. The implant of any of claims 170-171, wherein the non-circular cross-section is in the shape of a semicircle, oval, symmetric lens, asymmetric lens, trefoil, quatrefoil, regular polygon, irregular polygon, or star polygon.

173. The implant of any of claims 151-172, wherein a length of the at least one cannula is between 50 and 100%, 70 and 100%, or 95 and 100% of the length of the implant.

174. The implant of any of claims 151-173, further comprising internal protrusions on an internal surface of the at least one cannula.

175. The implant of claim 174, wherein the internal protrusions are in the shape of a sphere, tetrahedron, hexahedron, pentagonal pyramid, or triangular prism.

176. The implant of any of claims 174-175, wherein the internal protrusions have dimensions between 0.01 and 1.0 mm, 0.02 and 0.7 mm, or 0.1 and 0.5 mm.

177. The implant of any of claims 151-176, wherein the bioabsorbable mineral fibers comprise between 50 and 100%, 70 and 100%, or 80 and 100% longitudinal fibers.

178. The implant of any of claims 151-177, wherein the longitudinal fibers are between 10 mm and 150 mm, 30 mm and 100 mm, or 60 mm and 75 mm in length.

179. The implant of any of claims 151-178, wherein the bioabsorbable mineral fibers comprise between 0 and 50%, 0 and 30%, or 0 and 20% helical fibers.

180. The implant of claim 179, wherein the helical fibers are between 50 mm and 1000 mm, 100 mm and 750 mm, or 200 mm and 300 mm in length.

181. The implant of any of claims 179-180, wherein a winding angle of the helical fibers is between 3 and 45 degrees, 5 and 30 degrees, or 8 and 20 degrees.

182. The implant of any of claims 151-181, wherein the bioabsorbable mineral fibers comprise a glass composition including Na20 (10-19 mol%), CaO (9-14 mol%), MgO (1.5-8 mol%), B2O3(0.5-3 mol%), P2O5 (0.1-0.8 mol%), and Si02(67- 73 mol%).

183. The implant of any of claims 151-182, wherein the biodegradable polymer matrix comprises a polymer selected from PLDLA, PLLA, PDLLA, PGA, PLGA, PCL, or combinations thereof.

184. The implant of claim 183, wherein the polymer matrix comprises PLDLA with an L:D ratio between 60:40 and 99: 1, or between 70:30 and 96:4.

185. The implant of any of claims 151-184, wherein the polymer matrix has an inherent viscosity between 1.2 and 2.4 dl / g, or between 1.5 and 2.1 dl / g.

186. The implant of any of claims 151-185, wherein the implant achieves complete bioabsorption within 24 months or 12 months.

187. The implant of any of claims 151-186, wherein the implant is configured as a fully threaded cannulated nail or fully threaded cannulated screw.

188. The implant of any of claims 151-187, wherein the shaft comprises a distal end with a tip and a proximal end with a head, wherein either or both may be flattened.

189. The implant of any of claims 151-188, wherein mineral content of the external threading is between 10 and 40%, 15 and 35%, or 20 and 35% lower than the mineral content of the implant shaft composition.

190. The implant of any of claims 151-189, wherein the implant has a density between 1 and 2 g / mL, 1.2 and 1.9 g / mL, or 1.4 and 1.8 g / mL.

191. A self-tapping fully threaded cannulated implant comprising : a cannulated shaft comprising bioabsorbable mineral fibers and a polymer matrix; wherein the shaft includes external threading having a thread geometry configured for selftapping insertion without pre-tapping of bone; wherein the thread geometry includes: a) a thread leading angle between 5 and 60 degrees; b) a thread trailing angle between 1 and 30 degrees; c) a thread height between 0.2 and 1.5 mm; wherein the mineral fibers provide mechanical properties enabling the thread geometry to overcome frictional resistance during insertion; wherein the shaft includes differential pitch threading enabling compression application; and wherein the shaft includes at least one cannula for surgical instrumentation.

192. The implant of claim 191, wherein the thread leading angle is between 10 and 45 degrees or 15 and 25 degrees.

193. The implant of any of claims 191-192, wherein the thread trailing angle is between 3 and 20 degrees or 5 and 15 degrees.

194. The implant of any of claims 191-193, wherein the thread height is between 0.3 and 0.8 mm or 0.4 and 0.6 mm.

195. The implant of any of claims 191-194, wherein the thread geometry further comprises a thread base width between 0.3 and 2.0 mm, 0.4 and 1.5 mm, or 0.5 and 0.8 mm.

196. The implant of any of claims 191-195, wherein the thread geometry further comprises a thread tip width between 0.01 and 1.0 mm, 0.03 and 0.5 mm, or 0.05 and 0.15 mm.

197. The implant of any of claims 191-196, wherein the thread geometry further comprises thread base leading radius and thread base trailing radius each between 0.1 and 1 .0 mm, 0.1 and 0.6 mm, or 0.2 and 0.4 mm.

198. The implant of any of claims 191-197, wherein the external threading has a cross-sectional profile selected from trapezoid, triangular, rectangular, or continuous sine wave configurations.

199. The implant of any of claims 191-198, wherein the differential pitch threading comprises at least two distinct pitch regions including a constant pitch region and a variable pitch region.

200. The implant of claim 199, wherein the variable pitch region has a progressive pitch that decreases by between 5-80%, 20-70%, or 45-55% compared to the constant pitch region.

201. The implant of any of claims 199-200, wherein the constant pitch region comprises at least 50%, 60%, or 70% of the length of the implant and the variable pitch region comprises at least 10%, 15%, or 20% of the length of the implant.

202. The implant of any of claims 191-201, wherein the external threading extends over at least 90%, 95%, or 100% of the length of the shaft.

203. The implant of any of claims 191-202, wherein a wall thickness surrounding the at least one cannula is at least 0.5 mm, between 0.3-2 mm, or between 0.5-0.8 mm.

204. The implant of any of claims 191-203, wherein the length of the implant is between 15 mm and 100 mm, 30 mm and 85 mm, or 60 mm and 70 mm.

205. The implant of any of claims 191-204, wherein a core diameter of the implant is between 2.5 mm and 6.0 mm, 3 mm and 4.5 mm, or 3.5 mm and 3.8 mm.

206. The implant of any of claims 191-205, wherein a core diameter at a proximal end is greater than a core diameter at a distal end by between 0.05 mm and 1.5 mm, 0.1 mm and 1 mm, or 0.2 mm and 0.5 mm.

207. The implant of any of claims 191-206, wherein a length of the at least one cannula is between 50 and 100%, 70 and 100%, or 95 and 100% of the length of the implant.

208. The implant of any of claims 191-207, wherein at least 20% of the length of the at least one cannula is non-circular.

209. The implant of claim 208, wherein at least one width of the non-circular portion is at least 1.5 mm, between 1.5 mm and 3 mm, or between 2 mm and 2.5 mm.

210. The implant of any of claims 208-209, wherein the non-circular portion is in the shape of a semicircle, oval, symmetric lens, asymmetric lens, trefoil, quatrefoil, regular polygon, irregular polygon, or star polygon.

211. The implant of any of claims 191-210, further comprising internal protrusions on an internal surface of the at least one cannula for surgical instrument retention.

212. The implant of claim 211, wherein the internal protrusions are in the shape of a sphere, tetrahedron, hexahedron, pentagonal pyramid, or triangular prism.

213. The implant of any of claims 211-212, wherein the internal protrusions have dimensions between 0.01 and 1.0 mm, 0.02 and 0.7 mm, or 0.1 and 0.5 mm.

214. The implant of any of claims 191-213, wherein the bioabsorbable mineral fibers comprise between 50 and 100%, 70 and 100%, or 80 and 100% longitudinal fibers.

215. The implant of any of claims 191-214, wherein the bioabsorbable mineral fibers comprise between 0 and 50%, 0 and 30%, or 0 and 20% helical fibers.

216. The implant of claim 215, wherein a winding angle of the helical fibers is between 3 and 45 degrees, 5 and 30 degrees, or 8 and 20 degrees.

217. The implant of any of claims 191-216, wherein the bioabsorbable mineral fibers comprise a glass composition including Na20 (10-19 mol%), CaO (9-14 mol%), MgO (1.5-8 mol%), B2O3(0.5-3 mol%), P2O5 (0.1-0.8 mol%), and Si02(67- 73 mol%).

218. The implant of any of claims 191-217, wherein the polymer matrix comprises a biodegradable polymer selected from PLDLA, PLLA, PDLLA, PGA, PLGA, PCL, or combinations thereof.

219. The implant of claim 218, wherein the polymer matrix comprises PLDLA with an L:D ratio between 60:40 and 99: 1, or between 70:30 and 96:4.

220. The implant of any of claims 191-219, wherein the polymer matrix has an inherent viscosity between 1.2 and 2.4 dl / g, or between 1.5 and 2.1 dl / g.

221. The implant of any of claims 191-220, wherein the mechanical properties provided by the mineral fibers include enhanced flexural strength, torsional strength, and compression resistance compared to non-reinforced polymer implants.

222. The implant of any of claims 191-221, wherein the thread geometry enables compression generation across threaded segments during insertion.

223. The implant of any of claims 191-222, wherein the implant achieves complete bioabsorption within 24 months or 12 months.

224. The implant of any of claims 191-223, wherein the implant is configured as a fully threaded cannulated nail or fully threaded cannulated screw.

225. The implant of any of claims 191-224, wherein the shaft comprises a distal end with a tip and a proximal end with a head, wherein either or both may be flattened.

226. The implant of any of claims 191-225, wherein the implant maintains performance integrity after trimming to a minimum length of 20 mm, 15 mm, or 10 mm.

227. The implant of any of claims 191-226, wherein the self-tapping capability eliminates the need for pre-drilling or tapping of bone prior to implant insertion.

228. A fully threaded cannulated implant comprising: a cannulated shaft having a wall surrounding at least one cannula; wherein the shaft comprises a distal end and a proximal end; wherein a core diameter of the proximal end is greater than a core diameter of the distal end by between 1% and 30%; wherein the shaft includes external threading with at least one region of variable pitch; wherein the shaft comprises bioabsorbable mineral fibers and a polymer matrix; wherein the tapered core diameter configuration enhances compression generation and mechanical properties; and wherein at least a portion of the cannula has a non-circular cross-section.

229. The implant of claim 228, wherein the core diameter of the proximal end is greater than the core diameter of the distal end by between 2-20% or 3-15%.

230. The implant of any of claims 228-229, wherein the core diameter of the proximal end is between 0.05 mm and 1.5 mm, 0.1 mm and 1 mm, or 0.2 mm and 0.5 mm greater than the core diameter of the distal end.

231. The implant of any of claims 228-230, wherein the variable pitch region comprises a progressive pitch that decreases by between 5-80%, 20-70%, or 45-55% over the length of the region.

232. The implant of any of claims 228-231, wherein the ratio of minimum to maximum pitch in the variable pitch region is between 0.05:0.8, 0.2:0.7, or 0.45:0.55.

233. The implant of any of claims 228-232, wherein the external threading further comprises a constant pitch region having a uniform pitch along its length.

234. The implant of claim 233, wherein the variable pitch region is positioned at the proximal end and the constant pitch region is positioned at the distal end.

235. The implant of any of claims 233-234, wherein the constant pitch region comprises at least 50%, 60%, or 70% of the length of the implant.

236. The implant of any of claims 228-235, wherein the variable pitch region comprises at least 10%, 15%, or 20% of the length of the implant.

237. The implant of any of claims 228-236, wherein the external threading extends over at least 90%, 95%, or 100% of the length of the shaft.

238. The implant of any of claims 228-237, wherein a wall thickness surrounding the at least one cannula is at least 0.5 mm, between 0.3-2 mm, or between 0.5-0.8 mm.

239. The implant of any of claims 228-238, wherein the length of the implant is between 15 mm and 100 mm, 30 mm and 85 mm, or 60 mm and 70 mm.

240. The implant of any of claims 228-239, wherein the core diameter of the implant is between 2.5 mm and 6.0 mm, 3 mm and 4.5 mm, or 3.5 mm and 3.8 mm.

241. The implant of any of claims 228-240, wherein a threaded diameter of the proximal end is between 0.1-10%, 0.5-7.5%, or 1-5% greater than a threaded diameter of the distal end.

242. The implant of any of claims 228-241, wherein the external threading has a thread height between 0.2 and 1.5 mm, 0.3 and 0.8 mm, or 0.4 and 0.6 mm.

243. The implant of any of claims 228-242, wherein the external threading has a thread leading angle between 5 and 60 degrees, 10 and 45 degrees, or 15 and 25 degrees.

244. The implant of any of claims 228-243, wherein the external threading has a thread trailing angle between 1 and 30 degrees, 3 and 20 degrees, or 5 and 15 degrees.

245. A fully threaded cannulated implant comprising: a cannulated shaft having external threading comprising: a) a distal constant pitch region extending over at least 50% of the implant length; b) a proximal progressive pitch region where the pitch decreases progressively from the distal region toward the proximal end; wherein the progressive pitch reduction is between 45% and 55% at the proximal tip compared to the distal constant pitch;wherein the progressive pitch configuration generates compression across the constant pitch region during insertion; wherein the shaft comprises bioabsorbable mineral fibers and a polymer matrix; wherein the constant pitch region is trimmable without losing compression functionality; and wherein the shaft includes at least one cannula for surgical access.

246. The implant of claim 245, wherein the distal constant pitch region extends over at least 60%, 70%, or 80% of the implant length.

247. The implant of any of claims 245-246, wherein the proximal progressive pitch region comprises at least 10%, 15%, or 20% of the length of the implant.

248. The implant of any of claims 245-247, wherein the progressive pitch reduction is between 20-70% or 5-80% at the proximal tip compared to the distal constant pitch.

249. The implant of any of claims 245-248, wherein the ratio of minimum to maximum pitch in the proximal progressive pitch region is between 0.05:0.8, 0.2:0.7, or 0.45:0.55.

250. The implant of any of claims 245-249, wherein the external threading extends over at least 90%, 95%, or 100% of the length of the shaft.

251. The implant of any of claims 245-250, wherein a wall thickness surrounding the at least one cannula is at least 0.5 mm, between 0.3-2 mm, or between 0.5-0.8 mm.

252. The implant of any of claims 245-251, wherein the length of the implant is between 15 mm and 100 mm, 30 mm and 85 mm, or 60 mm and 70 mm.

253. The implant of any of claims 245-252, wherein a core diameter of the implant is between 2.5 mm and 6.0 mm, 3 mm and 4.5 mm, or 3.5 mm and 3.8 mm.

254. The implant of any of claims 245-253, wherein a core diameter at the proximal end is greater than a core diameter at the distal end by between 0.05 mm and 1.5 mm, 0.1 mm and 1 mm, or 0.2 mm and 0.5 mm.

255. The implant of any of claims 245-254, wherein a core diameter at the proximal end is between 1-30%, 2-20%, or 3-15% greater than a core diameter at the distal end.

256. A bone fixation system comprising: a fully threaded cannulated implant having external threading and at least one internal cannula according to any of the above claims; and an adjustable length driver comprising: a) a shaft configured to engage with the cannulated implant; b) a sleeve positioned around at least a portion of the shaft; c) a length adjustment mechanism enabling controlled modification of an operational length of the shaft relative to the sleeve between a minimal operational length and a maximal operational length; d) a handle positioned at a proximal end of the driver; and e) a length indicator providing visual feedback regarding the current operational configuration of the shaft; wherein the driver is configured to transmit rotational forces from the handle to the implant during insertion procedures; and wherein the adjustable length capability accommodates different implant sizes and surgical approaches.

257. The system of claim 256, wherein the shaft operational length is adjustable between 10-200 mm, 30-175 mm, or 50-100 mm.

258. The system of any of claims 256-257, wherein the overall shaft adjustment length is between 10-150 mm, 30-120 mm, or 40-80 mm.

259. The system of any of claims 256-258, wherein the sleeve length is between 3- 100 mm, 15-75 mm, or 30-60 mm.

260. The system of any of claims 256-259, wherein the driver has an overall length between 100-400 mm, 150-300 mm, or 200-275 mm.

261. The system of any of claims 256-260, wherein the driver weight is between 15-1000 grams, 50-500 grams, or 100-300 grams.

262. The system of any of claims 256-261, wherein the length adjustment mechanism is operable by one hand or two hands.

263. The system of any of claims 256-262, wherein the length adjustment mechanism comprises moving the shaft relative to a fixed sleeve or moving the sleeve relative to a fixed shaft.

264. The system of any of claims 256-263, wherein the driver further comprises a locking mechanism enabling selective positioning and securing of the shaft at specific operational positions.

265. The system of claim 264, wherein the locking mechanism is selected from a spring-loaded ball and groove system, compression locking assembly, lever-actuated system, or screw mechanism.

266. The system of claim 265, wherein the spring -loaded ball and groove system comprises a spring, locking ball, and shaft grooves positioned at discrete intervals.

267. The system of claim 265, wherein the compression locking assembly comprises a compression locking nut and locking leaflets providing distributed engagement around the shaft circumference.

268. The system of claim 265, wherein the lever-actuated system comprises an actuation lever, spring, and locking tooth engaging with locking grooves.

269. The system of any of claims 264-268, wherein the locking mechanism includes a lock release actuation mechanism for manual control of engagement and disengagement.

270. The system of any of claims 256-269, wherein the driver is cannulated with an internal channel accommodating guide wires.

271. The system of claim 270, wherein a cannulation diameter is between 0.2-3.0 mm, 0.5-2.5 mm, or 1.0-2.0 mm.

272. The system of any of claims 256-271, wherein the shaft has a cross-sectional geometry selected from regular hexagon, irregular hexagon, pentagon, square, or star configurations.

273. The system of any of claims 256-272, wherein the shaft has an incircle diameter between 1.0-5.0 mm, 1.5-3.5 mm, or 2.0-3.0 mm.

274. The system of any of claims 256-273, wherein the shaft has a circumcircle diameter between 1.0-6.0 mm, 1.6-4.0 mm, or 2.0-3.5 mm.

275. The system of any of claims 256-274, wherein the shaft has a minimal wall thickness between 0. 1-2.5 mm, 0.2-1.0 mm, or 0.3-0.5 mm.

276. The system of any of claims 256-275, wherein the sleeve has an internal cannulation geometry corresponding to the shaft cross-sectional geometry.

277. The system of any of claims 256-276, wherein the sleeve has an incircle diameter between 1.3-7.0 mm, 1.8-5.0 mm, or 2. 1-4.5 mm.

278. The system of any of claims 256-277, wherein the driver comprises selfretaining features enabling secure implant engagement regardless of driver orientation.

279. The system of claim 278, wherein the self-retaining features maintain secure implant positioning during vertical, horizontal, and angled orientations.

280. The system of any of claims 278-279, wherein the self-retaining features comprise shaft-based retention features, sleeve-based retention features, or combinations thereof.

281. The system of any of claims 256-280, wherein the driver comprises an AO quick connector for compatibility with existing surgical instrument platforms.

282. The system of claim 281, wherein the AO quick connector enables integration with AO-compatible handles or power tools.

283. The system of any of claims 256-282, wherein the length indicator comprises graduated markings, numerical indicators, or visual coding systems.

284. The system of any of claims 256-283, wherein the length indicator remains visible throughout the range of operational shaft positions.

285. The system of any of claims 256-284, wherein the driver components are constructed from metal, polymer, or combinations thereof.

286. The system of any of claims 256-285, wherein torque transmission occurs through direct coupling, locking mechanism components, sleeve assembly, or combinations thereof.

287. The system of any of claims 256-286, wherein the driver accommodates various implant sizes through the adjustable length capability.

288. The system of any of claims 256-287, wherein the system enables controlled implant insertion with precise positioning capability.

289. The system of any of claims 256-288, wherein the driver engagement features correspond to non-circular cannula geometry of the implant.

290. The system of any of claims 256-289, wherein the system provides compatibility with guide wire-based surgical procedures.

291. A bone fixation system comprising :a cannulated implant having external threading and at least one internal cannula according to any of the above claims; and a driver system comprising: a) a shaft configured for engagement with the cannulated implant; b) self-retaining features enabling secure implant engagement regardless of driver orientation; c) retention mechanisms selected from shaft-based retention features, sleevebased retention features, or combinations thereof; wherein the self-retaining features maintain secure implant positioning during vertical, horizontal, and angled orientations; wherein the retention mechanisms engage with internal surfaces of the implant cannula or external surfaces of the implant; wherein the self-retaining capability eliminates need for additional holding instruments during implant insertion; and wherein the driver enables controlled release of the implant upon completion of insertion.

292. The system of claim 291, wherein the shaft-based retention features comprise mechanical interference elements configured to engage with non-circular portions of the implant cannula.

293. The system of any of claims 291-292, wherein the shaft-based retention features provide graduated retention force characteristics that increase with driver insertion depth.

294. The system of any of claims 291-293, wherein the sleeve-based retention features provide implant engagement through external contact with implant surfaces or interaction with implant threading.

295. The system of any of claims 291-294, wherein the sleeve-based retention features accommodate various implant diameters and thread configurations while providing consistent retention force.

296. The system of any of claims 291-295, wherein the retention mechanisms comprise spring-loaded retention elements, expandable gripping mechanisms, or geometric configurations providing mechanical interference.

297. The system of any of claims 291-296, wherein the retention mechanisms engage with internal protrusions positioned on cannula surfaces of the implant.

298. The system of any of claims 291-297, wherein the self-retaining features maintain engagement during rapid movements or repositioning actions during surgical procedures.

299. The system of any of claims 291-298, wherein the retention force is calibrated to provide adequate holding capability while enabling controlled release during appropriate insertion forces.

300. The system of any of claims 291-299, wherein the driver comprises multiple retention mechanisms that work together to provide redundant engagement capability.

301. The system of any of claims 291-300, wherein the retention mechanisms engage sequentially as the implant is positioned on the driver, providing progressive retention force increase.

302. The system of any of claims 291-301, wherein the retention features accommodate manufacturing tolerances in implant cannula dimensions while maintaining consistent performance.

303. The system of any of claims 291-302, wherein the retention mechanisms are designed to prevent damage to bioabsorbable composite implant materials during engagement and release.

304. The system of any of claims 291-303, wherein the retention forces are distributed over adequate surface areas to prevent localized stress concentrations in implant materials.

305. The system of any of claims 291-304, wherein the driver comprises an adjustable length mechanism enabling modification of operational length while maintaining retention capability.

306. The system of any of claims 291-305, wherein the driver is cannulated to accommodate guide wire passage while providing retention functionality.

307. The system of any of claims 291-306, wherein the retention mechanisms accommodate implant cannula geometries including hexagonal, star, oval, or polygonal cross-sections.

308. The system of any of claims 291-307, wherein the self-retaining features function effectively across gravitational loading conditions encountered during surgical manipulation.

309. The system of any of claims 291-308, wherein the driver enables torque transmission to the implant while maintaining secure retention throughout rotational insertion procedures.

310. The system of any of claims 291-309, wherein the retention system provides tactile and audible feedback confirming proper implant engagement.

311. The system of any of claims 291-310, wherein the controlled release mechanism enables smooth implant separation upon completion of insertion without requiring additional tools.

312. The system of any of claims 291-311, wherein the driver comprises a handle positioned at a proximal end for manual manipulation and control.

313. The system of any of claims 291-312, wherein the retention mechanisms maintain functionality throughout the resorption process of bioabsorbable implant materials.

314. The system of any of claims 291-313, wherein the driver accommodates various implant lengths through the self-retaining capability without requiring different driver sizes.

315. The system of any of claims 291-314, wherein the system enables single- handed operation while maintaining secure implant retention.

316. The system of any of claims 291-315, wherein the retention features are positioned to avoid interference with implant threading during insertion procedures.

317. The system of any of claims 291-316, wherein the driver comprises length indication features providing visual feedback regarding current operational configuration.

318. The system of any of claims 291-317, wherein the retention mechanisms accommodate both constant pitch and variable pitch threading configurations of implants.

319. The system of any of claims 291-318, wherein the self-retaining capability reduces surgical procedure complexity by eliminating need for additional retention instruments.

320. The system of any of claims 291-319, wherein the driver components are constructed from materials providing biocompatibility and sterilization durability for repeated surgical use.

321. A bone fixation system comprising: a fully threaded cannulated implant having external threading and at least one internal cannula according to any of the above claims; anda driver comprising: a) an AO quick connector positioned at a proximal end configured to engage with AO-compatible handles or power tools; b) an adjustable length mechanism enabling modification of shaft operational length; c) a sleeve accommodating adjustable shaft components while maintaining AO connector compatibility; d) a length indication system providing visual feedback during AO instrument operation; e) a shaft configured for torque transmission from the AO connector to the implant; wherein the AO quick connector enables integration with existing surgical instrument platforms; wherein torque transmission occurs through the AO connector interface to the shaft engagement features.

322. A bone fixation system comprising: a cannulated implant having external threading and at least one internal cannula according to any of the above claims; and a driver comprising: a) a shaft configured to engage with the cannulated implant; b) a locking mechanism enabling selective positioning and securing of the shaft at specific operational positions; c) a lock release actuation mechanism for manual control of locking engagement and disengagement; wherein the locking mechanism is selected from: i) a spring -loaded ball and groove system comprising a spring, locking ball, and shaft grooves; ii) a compression locking assembly comprising a compression locking nut and locking leaflets; iii) a lever- actuated system comprising an actuation lever, spring, and locking tooth; or iv) a screw mechanism utilizing threaded components for positional control; wherein the locking mechanism maintains shaft position during implant insertion procedures; and wherein the lock release mechanism enables single-handed or two-handed operation.

323. A bone fixation system comprising: a cannulated implant having external threading and at least one internal cannula according to any of the above claims; and a cannulated driver comprising: a) a shaft having an internal cannulation extending longitudinally through the shaft; b) a cannulation diameter configured to accommodate standard surgical guide wires; c) adjustable length capability enablingshaft extension and retraction; d) engagement features configured to interface with the cannulated implant; wherein the shaft cannulation provides continuous channel for guide wire passage during implant insertion; wherein the cannulation diameter maintains adequate wall thickness for structural support and torque transmission; wherein the driver enables implant insertion over guide wires for precise surgical positioning; and wherein the system accommodates guide wire-based positioning and insertion techniques.

324. A bone fixation system comprising: a fully threaded cannulated implant having external threading and at least one internal cannula according to any of the above claims; and a driver comprising: a) a shaft having a cross-sectional geometry selected from regular hexagon, irregular hexagon, pentagon, square, or star configurations; b) a sleeve having an internal cannulation geometry corresponding to the shaft cross- sectional geometry; c) adjustable length mechanisms enabling controlled shaft positioning; d) torque transmission capability through geometric engagement between shaft and sleeve; wherein the shaft cross-sectional geometry provides defined engagement surfaces for torque transmission; wherein the sleeve cannulation geometry enables controlled shaft movement while maintaining rotational coupling; wherein the geometric configurations accommodate different torque transmission requirements; and wherein the system provides compatibility with various implant engagement requirements.

325. A bone fixation system comprising: a cannulated implant having external threading and at least one internal cannula according to any of the above claims; and a driver comprising: a) an adjustable shaft system with variable operational length; b) a comprehensive length indication system comprising graduated markings, numericalindicators, or visual coding systems; c) length adjustment actuation enabling controlled transition between operational configurations; d) a sleeve providing structural support throughout the adjustment range; wherein the length indication system provides real-time feedback regarding active shaft portion and operational length; wherein the length indication remains visible throughout the range of operational shaft positions; wherein the system enables customization of driver configuration according to specific surgical requirements; and wherein the length indication corresponds to common implant lengths and surgical approach requirements.

326. A bone fixation system comprising: a cannulated implant having external threading, at least one internal cannula with at least a portion having non-circular cross-section, and comprising bioabsorbable materials, according to any of the above claims; and a driver system comprising: a) a shaft configured to engage with the non-circular portion of the implant cannula; b) engagement features corresponding to the implant cannula geometry; c) adjustable length capability accommodating various implant dimensions; d) retention features compatible with bioabsorbable composite materials; wherein the shaft engagement features provide mechanical interference with the non- circular cannula portion; wherein the engagement distributes forces to prevent damage to bioabsorbable materials; wherein the driver accommodates implant cannula geometries including hexagonal, star, oval, or polygonal configurations; and wherein the system enables secure engagement without compromising implant structural integrity.

327. A bone fixation system comprising: a fully threaded cannulated implant having external threading and at least one internal cannula according to any of the above claims; and a driver comprising: a) multiple torque transmission pathways enabling rotational force transfer from handle to implant; b) torque transmission through direct coupling,locking mechanism components, sleeve assembly, or combinations thereof; c) adjustable length mechanisms maintaining torque transmission capability throughout adjustment range; d) interface configurations including keyed interfaces, splined connections, or friction-based coupling; wherein torque transmission pathways provide redundant rotational force transfer capability; wherein the system maintains effective torque transmission while accommodating length adjustment functionality; wherein torque transmission interfaces ensure reliable rotational force transfer during implant insertion; and wherein the multiple pathway design provides enhanced reliability for surgical applications.

328. A comprehensive bone fixation system comprising: a bioabsorbable cannulated implant having external threading with differential pitch characteristics and at least one internal cannula, according to any of the above claims; and a driver system comprising: a) adjustable length capability with minimal and maximal operational configurations; b) self-retaining features for secure implant engagement across all orientations; c) locking mechanisms for controlled shaft positioning; d) length indication systems for operational feedback; e) torque transmission capability through multiple pathways; f) compatibility features for bioabsorbable implant materials; wherein the integrated system enables seamless workflow between implant preparation and insertion procedures; wherein the driver accommodates various implant sizes through adjustable length mechanisms; wherein the system provides complete solution for bone fixation procedures; wherein component interfaces are coordinated for consistent performance characteristics; and wherein the integration reduces complexity of surgical workflows while maintaining precision control.

329. The implant of any of claims 1-61, wherein the implant exhibits a maximum flexural load of at least 130 N, at least 140 N, or at least 150 N when tested according to modified ASTM D790.

330. The implant of any of claims 1-61, wherein the implant exhibits a flexural strength of at least 380 MPa, at least 420 MPa, or at least 440 MPa when tested according to modified ASTM D790.

331. The implant of any of claims 1-61, wherein the implant exhibits an elastic modulus of at least 16,000 MPa, at least 17,000 MPa, or at least 17,200 MPa when tested according to modified ASTM D790.

332. The implant of any of claims 1-61, wherein the implant exhibits atorsional yield strength of at least 28 N, at least 30 N, or at least 31 N when tested according to ASTM F2502.

333. The implant of any of claims 1-61, wherein the implant exhibits a maximum torque of at least 38 Ncm, at least 40 Ncm, or at least 42 Ncm when tested according to ASTM F2502.

334. The implant of any of claims 1-61, wherein the implant exhibits an angle at break of at least 100 degrees, at least 110 degrees, or at least 115 degrees when tested according to ASTM F2502.

335. The implant of any of claims 1-61, wherein the implant exhibits a steady-state compression force of at least 7 Kgf, at least 8 Kgf, or at least 8.5 Kgf when tested using a compression force sensor.

336. The implant of any of claims 1-61, wherein the combination of progressive pitch threading and fiber reinforcement enables generation of compression forces that are at least 100% greater, at least 150% greater, or at least 200% greater than comparable implants without progressive pitch threading.

337. The implant of any of claims 1-61, wherein the bioabsorbable mineral fiber reinforcement provides mechanical properties enabling the implant to withstand insertion torques of at least 40 Ncm without structural failure.

338. The implant of any of claims 1-61, wherein the fiber-reinforced composite construction provides flexural properties that exceed those of non-reinforced bioabsorbable polymer implants by at least 50%, at least 75%, or at least 100%.

339. The implant of any of claims 1-61, wherein the combination of helical and longitudinal fiber orientations provides enhanced torsional resistance compared to implants with only longitudinal fiber reinforcement.

340. The implant of any of claims 1-61, wherein the progressive pitch threading combined with the fiber-reinforced construction enables self-tapping insertion while generating clinically significant compression forces across bone segments.

341. The implant of any of claims 1-61, wherein the mechanical properties are maintained throughout at least 80%, at least 90%, or at least 95% of the bioabsorption period.

342. The implant of any of claims 1-61, wherein the implant maintains structural integrity sufficient for bone fixation applications for at least 8 weeks, at least 12 weeks, or at least 16 weeks after implantation.

343. The implant of any of claims 1-61, wherein the fiber-reinforced construction provides impact resistance sufficient to withstand surgical insertion forces without delamination or fiber separation.

344. The implant of any of claims 1-61, wherein the threaded design combined with the composite material properties enables insertion without pre-tapping while achieving pullout strengths of at least 200 N, at least 300 N, or at least 400 N.

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