41 results about "Internal bone fixation" patented technology

Endosteal fixation of a ligament graft with an interference fixation device installed in a retrograde manner in ACL reconstruction is disclosed. The interference fixation device may be a screw or a ribbed implant fitted with a length of reinforced suture or wire for pulling the interference fixation device through the tibial tunnel. The suture extends beyond the leading tip of the interference fixation device a sufficient length to allow the interference fixation device to be passed into the joint by pulling on the suture or wire exiting the tibial tunnel. A driver or an impaction device, such as a slap hammer, is employed to advance and insert the interference fixation device in a retrograde manner into the tibial tunnel. Accordingly, interference fixation of the graft near the tibial plateau is provided, thereby eliminating graft abrasion at the tibial plateau tunnel opening.

A surgical method for transosseous fixation of a bone-tendon-bone (BTB) graft into a joint is disclosed. A longitudinal tunnel formed in a bone is intersected by a transverse pin. A flexible strand is drawn with the pin through the bone. A portion of the strand is diverted so as to protrude out of the entrance to the longitudinal tunnel. The strand portion is attached to a loop extending from the bone block of the BTB graft, preferably by forming the loop around the strand. The strand attached to the bone block loop is retracted into the tunnel, drawing the attached BTB graft into the tunnel. The BTB graft is fixed in the tunnel using a transverse implant passed through the loop.

An intraosseous fixation assembly for insertion into an osteotomy includes a wedge member for creating a resultant angle in the osteotomy, where the wedge member includes a body portion and a plurality of apertures. The fixation assembly also includes a first member adapted for coupling to the body portion at a first angle and a second member adapted for coupling to the body portion at a second angle, where each of the first and the second angles is at a divergent angle with respect to the body portion. In addition, the plurality of apertures includes at least a first aperture and a second aperture, where the first aperture is adapted for receiving the first member, and the second aperture is adapted for receiving the second member.

The invention relates to a bone implanting and internal fixation appliance with bioactivity and absorbability, which belongs to the field of bio-medical appliances, particularly to the field of medical appliances used for bone wound surgery, reparative and reconstructive surgery and plastic and cosmetic surgery. The appliance includes bone nails and a bone plate made of magnesium and the alloy thereof with bioactivity and absorbability. The bone implanting and internal fixation appliance is a bone internal fixation device, which comprises a blade plate and matched screws, intramedullary nails, a fracture and dislocation fixing device of vertebral column, bone nails or screws having individual fixation effect, wherein the bone internal fixation device is made of magnesium and the alloy thereof with bioactivity and absorbability. The bone internal fixation device can solve the problem in bioactivity of prior bone internal fixation device and promote healing the tissue where the device in implanted. The device also includes a protection layer prepared on the surface of the internal fixation device for controlling the degradation rate of magnesium alloy and the dissolution rate of magnesium ions, thus controlling the bioactivity and the absorption speed of the magnesium alloy device in an organism.

The invention adopts a melt polycondensation method. A few of monomers of C2-5 aliphatic dibasic alcohol, diethylene glycol, polyglycol, fumaric acid, maleic anhydride, lactic acid, glycolic acid, ethanolamine, C2 to C12 aliphatic diamine, glutamic acid, lysine, glycine, etc. are taken as basic materials to be synthesized to obtain non toxic unsaturated polyester-amide resin with adjustable degradation rate and lower cost; wherein, the partial fumaric acid or maleic anhydride can be replaced with phthalic anhydride, isophthalic acid, or adipic acid. The resin yearns for being used as matrix resin of medical bone internal fixation material, tissue engineering scaffold material, bone tissue temporary substitutes, environmental protection type bonding agent, environmental protection type fiberglass reinforced plastics, environmental protection type coating material, disposable tableware, packing material, shopping bags, disposable bags, drug coating or capsule, drug delivery (controlled-release) material, agricultural mulching films, etc., and can be recovered to be utilized.

The present invention is an improved unique odd angle internal fixation device for both a transverse and longitudinal fracture located at the junction of the metaphysis and diaphysis of a long bone such as the proximal humerus. The improved odd angle internal fixation device includes an elongated lag screw and a rectangular shaped guide plate having multiple holes throughout the plate to host pins and screws and four tips on the front side of the plate. A lag screw with a cylindric head having a hexagonal cavity introduced through the diaphyseal segment of the fracture at three angles, 90, and 150 and 160 degrees, cross fixing the respective bone longitudinal and transverse fracture line and settling in the depth of the epiphysis. An additional locking screw is introduced on the top of the lag screw head to securely lock the lag screw after being settled into the epiphysis. The guide plate serves as a guide for the lag screw and allows the engagement of the head of the lag screw to the inner wall of its short barrel portion. The engagement would cause the guide plate which is attached to the barrel, to be compressed against the diaphyseal cortex as the lag screw advances deeper into the epiphysis at said three angles.

The invention relates to application of pure titanium and titanium alloy (hereinafter called titanium) surface-etched TiO2 nano-porous array appearance in preparing human metal implant which can be a dental implant, a bone implant, a fixing plate and a fixing nail, wherein the appearance is to prepare a TiO2 nano-porous array structure on the titanium surface. The invention also provides an optimal preparation method of the appearance. The preparation method has the advantages that: the preparation can be performed at normal temperature and normal pressure; the prepared TiO2 nano-porous array is regular; and the method is relatively simple in process, convenient for operation, low in cost and short in process flow. The prepared titanium surface nano-porous array structure has selective effect to different types of cells, so that the success rate of implant can be greatly increased; the nano-porous array structure can inhibit fibroblast from adhering or multiplying on the surface of the structure, so that the success rate of bone and dental implant operation and bone internal fixation can be greatly improved; and therefore, the preparation method is a bone implant material and bone fixation material surface appearance modification method with clinical application prospect.

The invention uses a melt phase polycondensation method, uses dimer acid as a reaction monomer for the first time, and performs copolymerization on the dimer acid and several monomers in the group consisting of ethylene glycol, propylene glycol, diethylene glycol, neopentyl glycol, polyethylene glycol, fumaric acid, maleic anhydride, adipic acid, phthalic anhydride and m-phthalic acid to obtain an unsaturated polyester resin with excellent combination properties and low cost. The resin is expected to serve as the matrix resin of medical intrabony fixing materials, tissue engineering support materials, bone tissue temporary substitutes, environment-friendly adhesives, environment-friendly fiber glass reinforced plastics, environment-friendly paints, disposable tableware, packaging materials, shopping bags, garbage bags, pharmaceutical coatings, or capsules, pharmaceutical slow-release (controlled-release) materials, agricultural mulching film and the like.

Internal bone fixation devices and methods for using the devices for repairing a weakened or fractured bone are disclosed herein. According to aspects illustrated herein, there is provided a device (700) for repairing a fractured bone that includes a delivery (710) having an elongated shaft (701) with a proximal end, a distal end, and a longitudinal axis therebetween, the delivery catheter (710) having an inner void (713) for passing at least one reinforcing material, and an inner lumen (711) for accepting a light pipe (652), wherein a distal end (723) of the inner lumen (711) terminates in an optical lens (754); a conformable member (703) releasably engaging the distal end of the delivery catheter (710), the conformable member (703) moving from a deflated state to an inflated state when the at least one reinforcing material is delivered to the conformable member (703); and an adapter releasably engaging the proximal end of the delivery catheter (710) for receiving the light pipe (652) and the at least one reinforcing material.

The invention discloses a high strength degradable intraosseous fixation composite material. A magnesium alloy pipe is filled with a high polymer material to form a high strength degradable sandwich composite material, by weight percentage, the degradable magnesium alloy pipe accounts for 5-70%, and the balance is the high polymer material, which is preferably polylactic acid. For the degradation product, because of the neutralization reaction of magnesium hydroxide and lactic acid, later-stage rapid degradation of polylactic acid is accelerated, thus solving the problem of aseptic inflammation caused by acidic accumulation in a degradation process of polylactic acid during clinical application. And magnesium alloy degradation and basically slight expansion of polylactic acid at the early stage further strengthen the support function of the composite material, therefore the high strength degradable intraosseous fixation composite material has very good clinical application prospect.

A high-strength high-modulus absorble material as intrabony fixing material is prepared from calcium polyphosphate fibres as reinforcing component and polylactide as substrate in wt ratio of (1-80):(20-99). Its advantages include high compatibility to bone tissue, no poison and untoward effect, bio-degradable, and low cost.

An internal bone fixation device that includes a support frame that is strong but able to absorb compressive forces and that surrounds a porous architecture that helps facilitate bone fusion.

The invention relates to a human body-absorbable and enhancement-type bone fixation structure material 3D printed with fused deposition modeling FDM technology and a preparation method thereof. The enhancement-type bone fixation structure material is prepared by performing 3D printing formation on degradable biological materials by adopting the FDM technology and then reinforcing and toughening the degradable biological materials subjected to 3D printing formation. The preparation method comprises the following steps: (1) a degradable biological material A is 3D printed into bone fixation structure products by adopting the FDM technology; (2) a degradable biological material B is dissolved in a specific solvent to prepare a B solution; (3) vacuum encapsulation is carried out on the bone fixation structure products after the inner air of the bone fixation structure products is removed in vacuum atmosphere, the encapsulated products are put in the B solution, and the encapsulation is removed; (4) then, the encapsulation-removed products are subjected to ultrasonic treatment; (5) the treated products are dried to remove the solvent to obtain the human body-absorbable and enhancement-type bone fixation structure material 3D printed with the FDM technology. The enhancement-type bone fixation structure product material provided by the invention is comparatively good in toughness, suitable for being used as an internal bone fixation structure material, easy in preparation method, low in cost and environment-friendly.

The invention relates to a nickel-titanium memory alloy tubular bone internal fixator with a Ti / ZrTi(C,N) gradient coating having good biocompatibility on the surface and a preparation method thereof. The surface of a metal matrix of the nickel-titanium memory alloy tubular bone internal fixator is provided with the Ti / ZrTi(C,N) gradient coating with good biocompatibility, wherein the Ti / ZrTi(C,N) gradient coating has a double-layer structure and consists of a Ti intermediate layer which is contacted with the surface of the nickel-titanium tubular bone internal fixator and a ZrTi(C,N) surface layer; the thickness of the Ti intermediate layer is 0.1 to 0.5 mu m; and the thickness of the ZrTi(C,N) surface layer is 1.0 to 5.0 mu m. The preparation method comprises the following steps: 1) processing the tubular bone internal fixator with a nickel-titanium memory alloy; and 2) performing surface pretreatment on the nickel-titanium memory alloy tubular bone internal fixator, and performing two-step magnetron sputtering treatment to obtain the Ti / ZrTi(C,N) gradient coating consisting of the Ti intermediate layer and the ZrTi(C,N) surface layer in sequence on the surface of the tubular bone internal fixator.

Disclosed herein is a bone fixation device. The fixation device has a head portion having a conduit and a plurality of pawls formed therein along one side of the conduit; and an elongation strip having a hooked end and a plurality of ratchet teeth formed thereon the body of the strip. The head portion is connected to the non-hooked end of the elongation strip at an angle between 100-170 degrees, and the plurality of pawls of the head portion engage the plurality of teeth when the elongation strip is inserted into the conduit of the head portion to form a loop around the weaken or fractured bone so as to stabilize the weaken or fractured bone.

Disclosed is a novel synthesis and cross-linking method which can completely degrading intraosseous fixed polymer. The invention adopts 1, 2-propylene glycol (or ethylene glycol ), dineopentyl alcohol neopentyl glycol, maleic anhydride, phthalic anhydride, glycin (or caprolactam) and cyclohexanol as raw material to synthesize an adjustable, innocuous, low-cost unsaturated polyesteramide, by a method of melt phase polycondensation and molecular chain end capping. By adding an amount of crosslinking agent (vinyl acetate or vinyl pyrrolidone) and initiating heat treatment after the accelerant crosslinking at room temperature, the completely degradable intraosseous fixed material with high strength can be produced. The unsaturated polyesteramide can also be developed into completely-degradable disposable tablewares, packing materials, flowerpots, medical supplies, drug-coating or basis materials such as delayed (controlled) release materials for capsules and drugs, glass fiber reinforced plastics etc.

The invention relates to a high-strength absorbable lamellar composite endosseous fixing instrument and a preparation method thereof. The instrument is mainly formed by compositing magnesium alloy sheets or strips with through holes on the surfaces according to a set lamellar rank structure mode, an interlayer of adjacent magnesium alloy sheets or strips are subjected to high-temperature bonding and solidifying by means of low-content binding agent polylactic acid high polymer materials, the magnesium alloy sheets or strips are directionally ranked in a disperse mode or mutually paralleled or crossed, the instrument comprises, by weight, 5%-49.9% of binding agent polylactic acid and 50.1%-95% of the magnesium alloy sheets or strips, and the thickness of the magnesium alloy sheets or strips is 0.01mm-1mm. According to the high-strength absorbable lamellar composite endosseous fixing instrument, the strength of the instrument is close to that of magnesium alloy, mechanics safety requirements of large load fracture fixation for higher strength can be met, and the instrument is particularly applicable to absorbable endosseous fixing implantation instruments which are high in strength requirement, large in size and clinically applicable to bone traumatology department, bone defect repair department and plastic surgery.

An anti-infection internal fixation apparatus for long bones of limbs, belonging to the technical field of orthopedic medical devices, is used for fighting infections during internal fixation. The technical scheme comprises: a board of a bone plate and the surface of a nail body of an intramedullary nail are provided with several grooves or circular bulges filled up with medicine; the grooves are arranged in parallel in the longitudinal direction of the bone plate board and of the intramedullary nail body. Or the circular bulges are evenly distributed on the bone plate board and the surface of the intramedullary nail body. Medicine is added in the grooves or between the circular bulges. The grooves or the circular bulges can be filled up with slow-release sensitive antibiotics so that the medicine can be delivered directly to the lesion. The targeted control of infection increases the replacement success rate of internal fixation, improves therapeutic effect, and reduces pains and financial burden for patients. The provided anti-infection internal fixation apparatus for long bones of limbs is an innovation in the technical field of orthopedic medical device, effectively overcoming the defect that the internal fixture works as one of sources of infection, giving solution to a long term unsolved problem, greatly decreasing the number of operation and time of recovery, and having great application value.

Internal bone fixation devices and methods for using the devices for repairing a weakened or fractured bone are disclosed herein. A device for use in repairing a fractured bone includes a delivery catheter having an elongated shaft with a proximal end, a distal end, and a longitudinal axis therebetween, wherein the delivery catheter has an inner void for passage of at least one reinforcing material and an inner lumen for passage of a light source; a conformable member releasably engaging the distal end of the delivery catheter, wherein the conformable member moves from a deflated state to an inflated state when the at least one reinforcing material is delivered to the conformable member; and an adapter releasably engaging the proximal end of the delivery catheter for receiving the light source and the at least one reinforcing material.

An intraosseous fixation device for reconstructing the knee posterior cruciate ligament, comprising a monoblock body (1), preferably made of titanium, formed by a rod (2) that, by one end, is widened to form a tab (3) being a point to receive the double semitendinosus and gracilis cross graft, while, in the opposite side, said rod is integrated to an eyelet (4) having a cooperating geometry to receive the low profile cortical screw and cooperating so that this end is embedded in the tibia.

The invention discloses an elasticity modulus determination method and preparation method of an individualized limb bone fracture setting internal fixation device.The elasticity modulus determination method comprises the steps that CT scanning is performed on a target limb bone, a three-dimensional model is rebuilt, the material attributes are given to the target limb bone, a finite element analysis model is built, and an elasticity modulus gradient distribution rule is obtained through analysis; the internal fixation device is drawn according to the operation requirements, and the elasticity modulus of the internal fixation device is obtained by aiming at the assembly relationship between the fracture part of the limb bone and the internal fixation device, combining the elasticity modulus gradient distribution rule and adopting an interpolation method.According to the elasticity modulus determination method and preparation method of the individualized limb bone fracture setting internal fixation device, internal individualization and external individualization are both achieved, the internal fixation device is externally fit with the human body limb bone and internally good in matching with the biomechanical characteristic of the individual bone, stress distribution of a steel plate and screws is more uniform and more reasonable, the stress shielding effect of an internal fixation material on the bone can be reduced, the compressing force of a fracture interface can be increased, the fracture heating fixation requirement is better met, and a scientific basis can be supplied to following research and development of a novel material, optimized design of an operation method and operative instruments and building of a relative database.

The invention discloses a memory fixing type bionic phalanx joint replacement part which is composed of a phalanx fixing part body and functional parts of the phalanx fixing part body and comprises a phalanx matching face, a phalanx inner supporting part and phalanx inner fixing teeth. The main view surface of the phalanx fixing piece body is pi-shaped, the front end of the phalanx fixing piece body is provided with a phalanx matching surface matched with a metacarpal joint friction pad, and the rear part of the phalanx fixing piece body is symmetrically provided with a phalanx inner supporting part and phalanx inner fixing teeth; based on ergonomic structural design and Ni-Ti memory alloy manufacturing, the technical advantages of the ergonomic structural design and the Ni-Ti memory alloy are fully exerted, so that the bionic metacarpophalangeal joint replacement component is better in conformity and good in mechanical cooperation; the unique memory function brings about the unique continuous automatic pressurization function of the internal fixation instrument for the orthopedics department, the continuous cohesive force of the internal fixation instrument provides a good biomechanical condition for healing of an affected bone, and looseness caused by bone healing and human body movement is avoided. The device is simple in structure, easy and convenient to use and beneficial to clinical application and popularization.

The invention provides a nanofiber-reinforced absorbable intraosseous fixation material and a preparation method thereof. The nanofiber-reinforced absorbable intraosseous fixation material is mainly formed by compounding a biodegradable polymer material, nanofibers and an artificial bone material, wherein the surfaces of the nanofibers are modified; the content of the nanofibers accounts for 10-20% of the total weight of the material; the content of the biodegradable polymer material accounts for 60-80% of the total weight of the material; and the artificial bone material accounts for 10-20% of the total weight of the material. The nanofiber-reinforced absorbable intraosseous fixation material disclosed by the invention overcomes the defect that a common intraosseous fixation material is prone to multi-scale fracture; the nanofibers have the characteristics of large specific surface, high porosity, strong modification capability and high elastic modulus; the mechanical properties of the absorbable intraosseous fixation material is greatly improved; meanwhile, bone absorption and bone ingrowth are also further promoted; and the postoperative recovery process is accelerated.

The development of an internal bone lengthening stabilization system with extramedullary localization to generate a dynamic axial stabilization system by the incorporation of tension-locked Kirschner wires and tension-locked cerclage wires is described.It features as a benefit the performance of bone lengthening, transports or reconstruction without any external fixation element, using the benefits of the pressure Kirschner wires in different planes without going through soft parts such as skin, cells, fascia, muscle, thereby reducing the risk of neurological and vascular injury to these elements.The present development is based on my previous patent “Canulated locking and fixation assembly for trauma surgery”, which allows the attachment of Kirschner wires, cerclage wires, ender or TENS with tension to internal extramedullary fixation elements such as locked plates or bone fixation rings.The present development has a central sliding zone of motorized lengthening, being able to use the different motorized systems currently developed for intramedullary nails.We think its main application will be for femur and tibia, but it can involve any bone if its development is considered useful.

The invention provides an intermediate implant of an implantable prosthetic limb. The intermediate implant of the implantable prosthetic limb comprises an implant body and a sealing piece, wherein the implant body is provided with a bone cement channel, the implant body comprises a threaded section and an artificial limb connecting section, the outer side wall of the threaded section is provided with an external thread and a limiting groove which are arranged in a crossed manner, the external thread and the limiting groove are both of a spiral structure, the rotation direction of the limiting groove is opposite to that of the external thread, the threaded section is provided with a plurality of first overflow holes formed in the extending direction of the limiting groove at intervals, one end of each first overflow hole penetrates through the channel wall of the bone cement channel and is communicated with the bone cement channel, and the other end of each first overflow hole penetrates through the bottom wall of the limiting groove and is communicated with the limiting groove; and an inlet of the bone cement channel is located at the lower end of the implant body, and the sealing piece is arranged at the inlet of the bone cement channel and blocks the bone cement channel. According to the technical scheme provided by the invention, the problem of poor intraosseous fixing effect of the intermediate implant of the implantable prosthetic limb in the prior art can be solved.

Provided is a stepped steel plate of a heel bone, relating to intraosseous fixation. The stepped steel plate comprises a backboard 1. The middle part of the backboard is provided with a stepped bend 2. The stepped bend 2 is divided into upper and lower regions by the backboard 1. The height difference between the upper and lower regions ranges from 5 to 10 mm. Four corners of the backboard 1 are provided with foot nails 4. Pointed ends of the foot nails 4 are located on the same plane. Two foot nails 4 in the upper region of the backboard 1 are mutually parallel. The dip angles downwardly tilt. Two foot nails 4 in the lower region of the backboard 1 are mutually parallel. The dip angles upwardly tilt. Arc bending areas 3 are arranged between the backboard 1 and the foot nails 4.