211 results about "Tibial bone" patented technology

Instrumentation for guiding a surgeon in performing a unicompartmental knee replacement includes a tibial block having a guide, and a milling tool adapted to engage the guide, such that the surgeon can mill the desired tibial bone bed by directing the milling tool along the guide. Further including a femoral jig having a cutting slot, a guide, and a milling tool adapted to engage the guide, such that a surgeon can cut a portion of the femur through the slot, and mill the femoral bone bed by directing the milling tool about the guide. A femoral trial removal clamp facilitates in removing the femoral trial prosthesis, and a spreader compression clamp aids in compressing the final prostheses as the bone cement cures.

An improved knee prosthesis includes a ceramic tibial component for articulation with natural or prosthetic (re-surfaced) femoral surfaces. The ceramic tibial component is provided in the form of a ceramic monoblock adapted for fixation relative to the patient's tibial bone, or alternately in the form of a ceramic bearing insert component carried by a tibial baseplate member which is adapted in turn for fixation relative to tibial bone. In either form, the ceramic tibial component includes at least one upwardly concave articulation surface for movable bearing engagement by a generally convex or condylar shaped femoral articulation surface. The ceramic tibial component provides improved wear characteristics with extended service life.

According to the invention, the system enables a preoperative study to be carried out wherein the tibia and / or femur is modelled on a computer (6) in 3D, the ideal cutting plane is defined and the position of the resection instruments (1, 2, 3) used to cut the bone is modelled. Additionally, according to the invention, the system enables redefinition of the ideal cutting plane and the positioning and orientation of the resection instruments (1, 2, 3) on the tibia and / or femur, in such a manner that the plane of the slot (4) of the cutting guide (3) through which the cutting tool is introduced coincides with the ideal cutting plane.

The invention relates to a mechanical device intended for correcting a malformation of the bones of the body. The device is continuously adjustable, making the surgeon's work easier and reducing surgery time, thus reducing the risk of infection and, above all, guaranteeing the desired precision for surgery. The device comprises a top plate (1) suitable for sliding over a bottom plate (2) by means of a guide (7). Said plates can be screwed on either side of an angled notch made in the bone. The plates comprise respectively top (5) and bottom (6) bearings of the notch of the bone. Said bearings form an acute-angle bevel which substantially matches the surfaces of the notch. One of the plates is provided with an adjustment screw (4) for continuous adjustment of the relative positions of the plates. The device also comprises a locking screw (3) suitable for maintaining the open position of the device and, consequently, the final angle of the notch of the bone in the desired position. The Top bearing of the notch of the bone having angular adjustment is suitable for correcting the angle of the bevelled surface of the bearing, in particular the tibial slope, by means of a tapered screw (8) adjustment an angular space in the bearing.

A knee implant includes a femoral component having first and second femoral component surfaces. The first femoral component surface is for securing to a surgically prepared compartment of a distal end of a femur. The second femoral component surface is configured to replicate the femoral condyle. The knee implant further includes a tibial component having first and second tibial component surfaces. The first tibial component surface is for contacting a proximal surface of the tibia that is substantially uncut subchondral bone. At least a portion of the first tibial component surface is a mirror image of the proximal tibial surface. The second tibial component surface articulates with the second femoral component surface.

There is disclosed a total knee replacement prosthesis, which can substitute the function of an anterior and / or a posterior cruciate ligament. A femoral component containing two intercondylar surfaces and an intercondylar region, a tibial component having a tibial platform and a bearing component, and a protrusion from the bearing component also are disclosed.

Systems and methods for providing deeper knee flexion capabilities, more physiologic load bearing and improved patellar tracking for knee prosthesis patients. Such systems and methods include (i) adding more articular surface to the antero-proximal posterior condyles of a femoral component, including methods to achieve that result, (ii) modifications to the internal geometry of the femoral component and the associated femoral bone cuts with methods of implantation, (iii) asymmetrical tibial components that have an unique articular surface that allows for deeper knee flexion than has previously been available, (iv) asymmetrical femoral condyles that result in more physiologic loading of the joint and improved patellar tracking and (v) modifying an articulation surface of the tibial component to include an articulation feature whereby the articulation pathway of the femoral component is directed or guided by articulation feature.

A femoral component of a knee prosthesis has spaced condyle surfaces defining a notch therebetween. The notch defines an elongated cam housing having an anterior cam and a posterior cam at opposite ends of the housing. The tibial component of the knee prosthesis includes a platform and a bearing supported on the platform, the bearing defining bearing surfaces configured to articulate with the condyle surfaces. The tibial component includes a spine projecting superiorly from the bearing that defines an anterior face and a posterior face. The posterior face and the posterior cam define complementary curved surfaces configured for cooperative engagement when the femoral component and the tibial component are at a predetermined flexion angle. The cam housing is configured to form a gap between the posterior cam and the spine when the knee is normally extended. In another feature, the spine includes a stiffening pin extending therethrough.

A tibial prosthetic implant includes a base or base plate with an offset tibial stem. The base includes an inferior surface adapted to abut a resected surface of a patient's tibia and forms a base for articulating surfaces adapted to articulate with the patient's femoral condyles. The longitudinal center axis of the tibial stem extends from the inferior surface of the base and is offset from a center of the base. The offset places the stem in position to extend into the central canal of the tibia so that it does not substantially interfere with the cortical bone when the inferior surface of the base substantially abuts and aligns with the resected surface of the tibia.

An improved knee prosthesis includes a ceramic tibial component for articulation with natural or prosthetic (re-surfaced) femoral surfaces. The ceramic tibial component is provided in the form of a ceramic monoblock adapted for fixation relative to the patient's tibial bone, or alternately in the form of a ceramic bearing insert component carried by a tibial baseplate member which is adapted in turn for fixation relative to tibial bone. In either form, the ceramic tibial component includes at least one upwardly concave articulation surface for movable bearing engagement by a generally convex or condylar shaped femoral articulation surface. The ceramic tibial component provides improved wear characteristics with extended service life.

In a human or animal patient, two bone portions separated by a cut or fracture are stabilized in a desired position relative to each other by bringing the two bone portions into this desired position, by pulling them against each other, by providing an opening having a mouth on a bone surface and reaching across the cut or fracture and walls in both bone portions, by inserting an implant into the opening and anchoring the implant in the walls of the opening with the aid of a material having thermoplastic properties and energy transmitted into the implant for in situ liquefaction of at least part of the material having thermoplastic properties. One exemplary application of the stabilizing procedure concerns the two tibial bone portions separated by tibial plateau leveling osteotomy in a canine patient suffering from cranial cruciate ligament damage or rupture in a stifle joint.

A system for forming keel openings in tibial bone includes a plurality of templates having different sizes, each template having a top surface, a bottom surface and a central opening extending between the top and bottom surfaces. The system includes a bone cutting instrument for forming the keel openings and a guide having a leading end that is adapted to be coupled with the templates so that the leading end of the guide is aligned with the central openings in the templates. The guide includes a plurality of slots extending toward the leading end thereof for guiding advancement of the bone cutting instrument through the central openings in the templates. Each slot is associated for use with one of the differently sized templates.

A drill guide for an anterior cruciate ligament reconstruction operation is provided. The drill guide allows a transplantation hole on a tibial bone and a transplantation hole on a femoral bone to be properly positioned without relying upon the experience and sense of the operator. The drill guide for an anterior cruciate ligament reconstruction operation includes a guide member regulating a movement of a drill guide in a direction perpendicular to an axis of the same, a pointing member having a tip part located in a position on an imaginary line extending from an axis of the guide member, and a light beam radiating member radiating a light beam traveling along the imaginary line extending from the axis of the guide member.

Systems and methods for providing deeper knee flexion capabilities, more physiologic load bearing and improved patellar tracking for knee prosthesis patients. Such systems and methods include (i) adding more articular surface to the antero-proximal posterior condyles of a femoral component, including methods to achieve that result, (ii) modifications to the internal geometry of the femoral component and the associated femoral bone cuts with methods of implantation, (iii) asymmetrical tibial components that have an unique articular surface that allows for deeper knee flexion than has previously been available, (iv) asymmetrical femoral condyles that result in more physiologic loading of the joint and improved patellar tracking and (v) modifying an articulation surface of the tibial component to include an articulation feature whereby the articulation pathway of the femoral component is directed or guided by articulation feature.

A replacement ligament prosthesis including an elongate replacement ligament having a femoral end and a tibial end. The prosthesis includes a bar, which in use will extend between the medial and lateral condyles of a femur and across the intercondylar notch, and to which the femoral end of the elongate replacement ligament will be fixed. The prosthesis also includes a fixing means, which in use will fasten the tibial end of the elongate replacement ligament to the tibia.

An improved tibial plateau leveling osteotomy plate is disclosed. The plate is contoured in its proximal head portion to more closely resemble the structure of the tibial bone segment that is cut and rotated during the procedure. The plate also preferably has screw holes in the proximal head portion that are machined through the pre-contoured proximal head portion and are designed to angle the screw in a targeted screw path with respect to the osteotomy.

The invention provides methods and apparatus for accurately cutting bones with a surgical cutting device, such as a sagittal saw, using a surgical navigation system without use of a complex cutting jig. A surgical navigation system is used to navigate a guide tube to be used to drill a k-wire into the bone. The k-wire will act as a guide to control at least one degree of freedom of a saw blade for making a cut in the bone. In an exemplary high tibial osteotomy procedure, in which two intersecting planar cuts must be made in the tibia in order to remove a wedge of bone, a surgical navigation marker is mounted on the guide tube. The surgeon uses the surgical navigation system to navigate the guide tube to the desired varus-valgus angle and height of the first cut and then drills a k-wire into the tibia at that varus-valgus angle using the guide tube. The process is repeated for the second cut. The surgeon then uses the two k-wires as guides for controlling the varus-valgus angle of a sagittal saw for the two planar cuts. The surgeon rests the saw blade flat on the respective k-wire to define the varus-valgus angle of the cut. The saw itself also is navigated, with the surgical navigation system providing a display showing the surgeon at least (1) the varus-valgus angle, (2) the cut depth, and (3) the anterior-posterior slope. The anterior-posterior slope and the depth of the cut is controlled freehand by the surgeon.

Controlled release of biopharmaceutical growth factors from a hydroxyapatite coating on a bioresorbable interference screw used in cruciate ligament reconstruction surgery on a human. Biologically active scaffolds, such as interference bone screws used for ligament fixation, made by growing calcium phosphate-based hydroxyapatite coatings on bioresorbable poly(α-hydroxy ester) scaffolds that provide controlled mineral dissolution and controlled release of bone morphogenetic protein-2. The biologically active scaffold provides improved bioavailability of BMP-2 growth factor that in turn provides enhanced graft-bone healing in the tibial bone tunnel. The coating method uses surface hydrolysis and modified simulated body fluid incubation which does not require solvent or heat and is conducted at room temperature.

The invention provides a navigation device capable of accurately positioning high tibial osteotomy. The navigation device comprises a positioning template and a bone cutting template, wherein the positioning template comprises a first fixing sheet, and navigation holes are formed in the first fixing sheet; the bone cutting template comprises a second fixing sheet, and a pendulum saw bone cutting groove is formed in the second fixing sheet. The invention further provides a manufacturing method of the navigation device capable of accurately positioning the high tibial osteotomy. The method comprises the following steps: collecting raw data, establishing a three dimensional model, determining a bone cutting plane and a bone cutting angle, designing navigation templates and making the navigation templates. Through the adoption of the navigation device and the manufacturing method thereof, which are disclosed by the invention, the diagnostic accuracy is further improved, the bone cutting accuracy is guaranteed, the limb alignment is restored, postoperative complications are reduced, and the functions of knee joints are improved.

A knee replacement system includes a femoral component including a lateral condylar articulating portion and a medial condylar articulating portion, a tibial tray including an upper articulating surface, and a tibial insert including (i) a first articulating portion for articulating with the lateral condylar articulating portion with a first condylar dwell point, (ii) a second articulating portion for articulating with the medial condylar articulating portion with a second condylar dwell point, (iii) a lower articulating surface for articulating with the upper articulating surface, and (iv) a coupling member for coupling with the tibial tray and defining an axis of rotation about which the tibial insert rotates with respect to the tibial tray, the axis of rotation intersecting the upper articulating surface at a location posterior to a dwell axis including the condylar dwell points when the dwell axis is projected onto the upper articulating surface.

A system for forming keel openings in tibial bone includes a plurality of templates having different sizes, each template having a top surface, a bottom surface and a central opening extending between the top and bottom surfaces. The system includes a bone cutting instrument for forming the keel openings and a guide having a leading end that is adapted to be coupled with the templates so that the leading end of the guide is aligned with the central openings in the templates. The guide includes a plurality of slots extending toward the leading end thereof for guiding advancement of the bone cutting instrument through the central openings in the templates. Each slot is associated for use with one of the differently sized templates.

The invention discloses a medial femoral single condyle prosthesis (201), a lateral femoral single condyle prosthesis (301), and a femoral trochlea prosthesis (401). The medial femoral single condyle prosthesis comprises an articular surface which is a surface making contact with the medial patella and the medial tibial plateau during the knee joint motion process, wherein the articular surface is presented as a segmental arc (203) on a first ellipse (38) on the sagittal position, and is presented as a segmental arc (95) on a first circle (94) on a coronal position; and an inside surface, which is the part adjoining femoral condyle cut bone surface and bone cement after prosthesis implantation, and is presented as a medial posterior condyle (202) with a straight line section and a medial distal end (209) consistent with the segmental arc (203). The prosthesis can be closer to the geometric shape of the normal human femoral condyle, and design parameter values of femoral prostheses of various types are simplified.

Constrained prosthesis for the knee joint including a femoral component, a tibial component and an intermediate component, wherein the femoral component is suitable for being constrained to an end of the femoral bone in proximity to the knee joint, wherein the tibial component is suitable for being constrained to an end of the tibial bone in proximity to the knee joint, the femoral component being suitable for coming into contact and being articulated with the tibial component, wherein the intermediate component is placed in use between the femoral component and the tibial component and wherein the constrained prosthesis comprises a first hinge and a second hinge adapted to rotatably constrain the femoral component to the tibial component.

The invention relates to a distal automatic cutting bone core extraction device which belongs to the technical field of orthopedic surgical equipment, and is used for complete extraction of a bone core with the length being multiple times of diameter length of the bone core, and the technical scheme is as follows: the device comprises a positioning needle, a soft tissue separator, a positioning sleeve, a path-opening trephine, a cutting trephine and a drillstock, wherein the path-opening trephine and the cutting trephine are cylinders, cutting teeth are circumferentially arranged on the upper edge of the end surface of the wall of the distal cylinder, two pin holes are arranged on the wall of the proximal cylinder, the path-opening trephine cylinder and the cutting trephine cylinder have the same inner diameter and the same outer diameter, cutting-off teeth which are arranged obliquely are fixedly arranged on the inner wall at the lower end of the cutting trephine, and scales along the direction of a long shaft are arranged on the surface of the outer wall of each cylinder. By utilizing the device, the difficult problem that the bone core with the length being a plurality of times or even more than ten times larger than the diameter can not be extracted completely at the distal end in an orthopedic surgery is solved, thereby having the ground-breaking significance; and the device is mainly used for extracting the bone core with complete shape from a thick bone block through a blind hole, and especially applicable to extracting the bone cones with femur proximal or distal expansion parts and tibia proximal expansion parts.

A force line positioner for the high tibial osteotomy comprises a force line measuring piece and a fixing assembly. The force line measuring piece is a length extending piece with the consistent extending direction as the lower limbs of a human body. The two ends are aligned to the central point of the human body caput femoris and the central point of the ankle for measuring a lower limb force line; the fixing assembly is used for installing the force line measuring piece and connected with the human body, and at least one end of the force line measuring piece is movably connected with the fixing assembly so that the end of the force line measuring piece can be adjusted inside the horizontal plane perpendicular to the length direction of the force line measuring piece. The problems that due to the fact that according to the existing high tibial osteotomy, a surgeon needs to hold the force line measuring piece by hand to perform the positioning work, the accuracy of the high tibial osteotomy is affected, the radiated dosage of the surgeon is increased, and the body health of the surgeon is affected are solved.

Controlled release of biopharmaceutical growth factors from a hydroxyapatite coating on a bioresorbable interference screw used in cruciate ligament reconstruction surgery on a human. Biologically active scaffolds, such as interference bone screws used for ligament fixation, made by growing calcium phosphate-based hydroxyapatite coatings on bioresorbable poly(α-hydroxy ester) scaffolds that provide controlled mineral dissolution and controlled release of bone morphogenetic protein-2. The biologically active scaffold provides improved bioavailability of BMP-2 growth factor that in turn provides enhanced graft-bone healing in the tibial bone tunnel. The coating method uses surface hydrolysis and modified simulated body fluid incubation which does not require solvent or heat and is conducted at room temperature.

A stabilizing sock has a foot section having a shape corresponding to a human foot and comprising a rearfoot portion corresponding to human calcaneous and talus bones and to tibial and fibular malleoli, a forefoot portion corresponding to human metatarsal and phalanx bones, and a midfoot portion between the rearfoot portion and the forefoot portion and corresponding to human cuboid, navicular and cuneiform bones. The sock has a medial stabilizer region on a medial side of the sock and a lateral stabilizer region on a lateral side of the sock. The medial stabilizer region covers a forward medial region of the rearfoot portion and a rearward medial region of the midfoot portion, and the lateral stabilizer region covers a forward lateral region of the rearfoot portion. The sock may also include lace bite protector regions and boot bang protector regions. Kits for assembling stabilizing socks are also described.

A knee prosthesis includes a femoral component having two condyles and an asymmetrical cam extending between the condyles. The cam has a medial end and a lateral end. The knee prosthesis also includes a tibial component having bearing surfaces and a post disposed between the bearing surfaces. The femoral component and tibial component are engageable by contact between the femoral condyles and tibial bearing surfaces, and by contact between the cam and post. The cam includes a first curvature defined by a first plane passing through the cam, and a second curvature defined by a second plane passing through the cam, the first curvature having a first vertex, and the second curvature having a second vertex, the distance between the first vertex and a medial plane being greater than the distance between the second vertex and the medial plane.

Anterior cruciate ligament reconstruction methods and devices are designed to achieve an anatomically accurate double bundle anterior cruciate ligament reconstruction by using a single femoral and tibial tunnel. The method and devices reconstruct the two bundles of the anterior cruciate ligament in a single femoral and tibial tunnel using a bone-patellar tendon-bone graft. The methods and devices enable an accurate anatomical reconstruction of the anteromedial and posterolateral bundles by creating a single femoral and tibial tunnel as opposed to creating two tunnels in the tibia and femur.