38 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 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.

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.

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 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.

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 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.

The invention relates to an internal fixation system for femur. The internal fixation system comprises a fixing block, wherein the fixing block is composed of a plurality of independent blocks throughconnecting rods; the connecting rods are bent to enable the fixing block to be attached to the outer surface of the proximal end of the femur; a pressurizing nail penetrates through a pressurizing nail hole of the fixing block to fix the fixing block on the outer surface of the proximal end of the femur; an inner sleeve of the pressurizing nail is rotated through a special wrench, so that a central nail goes deep into the femoral neck to realize pressurization of the broken end of the femoral neck; a locking screw penetrates through a locking screw hole of the fixing block and also penetratesthrough a rectangular through hole of the pressurizing nail to prevent the pressurizing nail from rotating and retreating; an expansion rod is inserted into an expansion rod connector at the bottom of the fixing block and is pre-bent; a bone holding fixing block is connected to the expansion rod in a sleeving manner through a mounting hole and is adjusted to a corresponding fracture part of the femoral shaft part; the bone holding fixing block is fixed on the femoral shaft part through a side block locking nail; the bone holding fixing block is locked through self-expansion of the expansion rod; and meanwhile, the bone holding fixing block can also pre-tighten the locking screw through the expansion rod, so that the effect of preventing the locking screw from retreating is achieved.