80results about "Femur" patented technology

A method of designing an orthopedic implant comprising: (a) iteratively evaluating possible shapes of a dynamic orthopedic implant using actual anatomical shape considerations and kinematic shape considerations; and, (b) selecting a dynamic orthopedic implant shape from one of the possible shapes, where the dynamic orthopedic implant shape selected satisfies predetermined kinematic and anatomical constraints.

A method of designing an orthopedic implant comprising: (a) iteratively evaluating possible shapes of a dynamic orthopedic implant using actual anatomical shape considerations and kinematic shape considerations; and, (b) selecting a dynamic orthopedic implant shape from one of the possible shapes, where the dynamic orthopedic implant shape selected satisfies predetermined kinematic and anatomical constraints.

A cage type support for bone grafting capable of achieving heat balance comprises a support shell and a base, and a multipurpose cavity is formed in the base. The inner cavity of the bracket shell is communicated with the multi-purpose chamber through a heat convection pipe group; the multipurpose cavity is configured to be a heat dissipation end communicated with the inner cavity, and heat balance of the inner cavity and the multipurpose cavity is achieved through a heat convection pipe set communicated between the multipurpose cavity and the inner cavity; a stable supporting foundation is provided, the osseointegration process is promoted, heat balance of the whole stent is achieved, the internal temperature of the femoral head is properly increased, local blood circulation of the femoral head is accelerated, cell activity is enhanced, metabolism is accelerated, proliferation and differentiation of related cells such as bone cells are promoted, angiogenesis and bone repair are promoted, and gas exchange is facilitated. The implant can be used for promoting the discharge of hydrops and pneumatosis, continuously releasing intraosseous pressure and providing a storage space and path for therapeutic drugs and / or nutritional ingredients, and the implant realizes multi-system collaboration and promotes overall rehabilitation.

The invention discloses a method for designing a bionic bone scaffold based on TPMS unit and lattice unit multi-plane fusion, and belongs to the technical field of bionic bone scaffolds. The porosity is adjusted by adjusting the wall thickness, so that an S and SC homogeneous unit porous structure with the target porosity is formed, and then a Schwarz unit cell and a simple cubic unit cell are subjected to plane smooth transition fusion in a fusion region or fusion function tan (x / w) mode; and respectively importing the established fusion model into mechanical simulation software to carry out quasi-static compression finite element simulation so as to obtain the elastic modulus and the yield strength which accord with the thighbone. According to the design, different types of TPMS units and traditional lattice units are subjected to heterogeneous unit fusion, the fused novel porous structure model has different function grading expressions, and a new thought is provided for design of the porous structure as a bionic bone scaffold.

The present disclose relates to modular surgical implants, which can be used in treating long bone defect. In particular, the disclosure relates to a surgical implant modular assembly comprising at least a first scaffold and a second scaffold, wherein the first and the second scaffolds are identical.

An implant assembly for a long bone having a longitudinal axis. The implant assembly has a stem that is received in a surgically prepared medullary canal of the long bone. The stem defines at least one transverse through-opening that extends through the stem from a first portion of the outer surface of the stem to an opposed second portion of the outer surface of the stem. Each transverse through-opening has a central axis that is substantially perpendicular to the longitudinal axis of the stem. Each transverse through-opening receives a fastener and has a longitudinal dimension, measured relative to the longitudinal axis of the stem, that is sufficient to permit axial movement, relative to the longitudinal axis of the stem, of the stem relative to each fastener.

An extracorporeally length-adjustable implant system comprises an implant component to be fastened to a bone to be lengthened and an adjustment device with two fastening parts that are displaceable relative to one another, each of which is intended for arrangement at a part of the bone to be lengthened, wherein the adjustment device is able to distract the two fastening parts and comprises a drive element with a permanent magnet arranged in rotationally fashion and a mechanism which converts a rotational movement of the permanent magnet into a distracting longitudinal movement of the adjustment device; and an extracorporeal drive unit for the drive element of the implant component. The extracorporeal drive unit comprises a rotatably mounted extracorporeal magnetic ring with an interior to receive the bone to be lengthened with the adjustment device, and an actuation device to rotate the extracorporeal magnetic ring in the ring plane thereof.

An implant system including a bone plate and a flexible implant attachment. The bone plate having a first arm and a second arm extending from a body of the bone plate. The flexible implant having a plurality of links chained together by a plurality of connectors. Each link of the plurality of links includes a core and a set of connectors. The set of connectors of the plurality of connectors extending laterally away from the core. Each connector of the set of connectors defines an opening positioned along a plane that intersects the longitudinal axis of the core at an oblique angle. Each connector of the set of connectors is linked to another connector of the plurality of connectors extending from another link of the plurality of links.

The present invention discloses a knee joint prosthesis structure capable of retaining anterior and posterior cruciate ligaments, comprising a femoral prosthesis, a pad, a tibial prosthesis and a patellar prosthesis, wherein the femoral prosthesis is provided with two arc-shaped brackets, a first channel is formed between the two brackets, two pads are provided, a support surface is provided at the upper end of the pad, a second channel is formed between the two pads, and the tibial prosthesis is provided with two base blocks, a connecting column is provided at the lower end of the base block, and a third channel is formed between the two base blocks. The present invention provides the femoral prosthesis, the pad and the tibial prosthesis with a first channel, a second channel and a third channel corresponding to each other, respectively, so that the anterior and posterior cruciate ligaments between the femur and the tibia can move freely in the space of the first channel, the second channel and the third channel, thereby retaining the anterior and posterior cruciate ligaments of the original knee joint, retaining all the bone of the femoral intercondylar spine and the tibial intercondylar spine, improving the stability, proprioception and spatial position sense of the patient's knee joint after surgery, restoring the patient's function of going up and down stairs and squatting, achieving normal leg flexion and extension movement, and improving patient satisfaction.

An extracorporeally length-adjustable implant system comprises – an implant component (1) for an implantable prosthesis, which is embodied to be fastened to a bone (90) to be lengthened and which comprises an adjustment device (2) with two fastening parts (21, 22) that are displaceable relative to one another, each of which is intended for arrangement at a part of the bone (90) to be lengthened, wherein the adjustment device (2) is embodied to distract the two fastening parts (21, 22) that are displaceable relative to one another and comprises a drive element (3) with a permanent magnet arranged in rotationally movable fashion and a mechanism (4) which converts a rotational movement of the permanent magnet into a distracting longitudinal movement of the adjustment device (2); and – an extracorporeal drive unit (7, 7', 7") for the drive element of the implant component (1). The extracorporeal drive unit (7, 7', 7") comprises a rotatably mounted extracorporeal magnetic ring (8) with an interior (80) embodied to receive the bone (90) to be lengthened with the adjustment device (2), and an actuation device (75) which is embodied to rotate the extracorporeal magnetic ring (8) in the ring plane thereof, wherein the extracorporeal magnetic ring (8) is embodied as a permanent magnet structure and has a directed static magnetic field which is stationary with respect to the ring in its interior, and the extracorporeal magnetic ring (8) is mechanically rotated by the actuation device (75). Thus, the invention attains an increase in the adjustment reliability while simplifying the drive unit at the same time, and hence it is rendered suitable for laymen and patients.

The disclosure relates to a surgical foam structure comprising an open-porous body made of at least one biocompatible implant material, wherein the porous body is dimensioned such that it fulfills at least one of the following: the porosity is in the range of 0.81 to 0.91 %, and the average pore diameter is in the range of 1.10 to 1.41 mm. The disclosure also relates to a system comprising the foam structure and a surgical fixation device for attaching the foam structure to bone.

The present invention discloses a knee joint prosthesis structure, comprising a femoral component, a cushion component, a tibial component and a patellar component, wherein the femoral component is provided with an intercondylar fixing block, the intercondylar fixing block has a protrusion, the inner wall of the femoral component is provided with a first coating for bone ingrowth or bone length, the cushion component is located between the femoral component and the tibial component, the lower end outer wall of the tibial component is provided with a second coating for bone ingrowth or bone length, the patellar component is located in front of the femoral component, and the inner wall of the patellar component is provided with a third coating for bone ingrowth or bone length. The knee joint prosthesis structure is a biological fixed prosthesis structure, which can avoid various disadvantages and complications caused by the use of bone cement fixation, reduce the harm of the current use of bone cement to patients and medical personnel related to surgery, improve the long-term stability of the prosthesis, reduce the prosthesis loosening rate and the surgical revision rate, save costs, and is conducive to solving the problem of expensive medical treatment, and has great social and economic benefits.

Telescopic nail for the treatment of fractures or deformations of long bones, as for example in the case of osteogenesis imperfecta or pseudo arthrosis. Comprising of a hollow stem; a rod telescopically inserted into said hollow stem; a first fastening element coupled to an end of said hollow stem for fixing to a first long bone end; a second fastening element coupled to an end of said rod for fixing to a second long bone end. Advantageously, one end of said hollow stem is provided with coupling means for coupling to an end of a tool which can be inserted into a cavity formed in the bone for insertion of the nail.

The present invention relates to a stem (4) for or of an implant (2) having a longitudinal axis (10) and at least one recess (12) adapted for cemented implantation into the medullary cavity (6) and / or a cavity (6) created by surgery of a long bone (8), characterized in that the recess is interrupted by a barrier (14). Further the present invention relates to a method for preparing a stem (4) of an implant (2) according to any one of the preceding claims for implantation, comprising the step of placing cement (16) into the recess (12) on both sides of the barrier (14).

The improved endoprosthetic device surface treatment encourages soft tissue attachment thereto. A porous mesh surface treatment creates on an outer surface of the endoprosthetic device a three-dimensional surface structure similar to cancellous bone. Suture attachment features are provided at various locations around the treated surface structure to initially affix a vascularized soft tissue to the treated surface. As the patient heals the soft tissue grows and infiltrates the porous mesh surface to achieve an attachment strength substantially equal to the surrounding tissue.

A universal femoral head repair module, characterized in that it includes a spherical patch and an axial positioning rod. According to the difference between the stabilization mode of the femoral head repair module and normal bone tissue, the femoral head repair module is a bone cement type femoral head repair module or a biological type femoral head repair module. According to the different materials, the spherical patch of the bone cement type femoral head repair module is a metal spherical patch, a polyethylene spherical patch or a ceramic spherical patch. The biological type femoral head repair module also includes a cancellous bone screw; according to the different materials, the spherical patch is a biological type metal spherical patch, a biological type polyethylene spherical patch or a biological type ceramic spherical patch. This method also includes a method for using a universal femoral head repair module. The purpose of the present invention is to solve the problem of low applicability of femoral head replacement materials, to provide a femoral head repair module and a method for using the same, to use the femoral head repair module and the method for using the same to repair the diseased femoral head, to avoid the progression of femoral head lesions and the formation of hip osteoarthritis.

The invention discloses an extensible femoral shaft prosthesis, and relates to the technical field of medical instruments, the extensible femoral shaft prosthesis comprises an upper split body, a lower split body, a limiting assembly and an adjusting ring, one end, far away from the upper split body, of a screw rod is used for extending into a containing channel, and the screw rod can move in the length direction of the containing channel; the limiting assembly is arranged on the lower split body and has a first limiting state and a second limiting state, and the limiting assembly in the first limiting state can limit the rotation freedom degree of the screw in the containing channel and the movement freedom degree of the screw in the length direction of the containing channel. The limiting assembly in the second limiting state can only limit the rotational degree of freedom of the screw rod in the accommodating channel; the adjusting ring is in threaded connection with the screw rod and located between the upper split body and the lower split body, and when the limiting assembly is in the second limiting state, the adjusting ring can be rotated to drive the screw rod to move in the channel so as to drive the upper split body and the lower split body to be away from each other. Postoperative recovery is facilitated, the infection risk is reduced, and postoperative recovery of a patient is better.

A bone part is repaired by a process. A first implant is attached to a first bone part. The first implant corresponds to an intraoperatively defined or an intraoperatively selected cutting path. A preoperatively defined second implant is attached to the first implant. The first implant and the second implant together augment the first bone part.

An implant system including a bone plate and a flexible mesh attachment. The bone plate having a first arm and a second arm extending from a body of the bone plate. The flexible mesh having a plurality of links chained together by a plurality of connectors. Each link of the plurality of links includes a core and a set of connectors. The set of connectors of the plurality of connectors extending laterally away from the core. Each connector of the set of connectors defines an opening positioned along a plane that intersects the longitudinal axis of the core at an oblique angle. Each connector of the set of connectors is linked to another connector of the plurality of connectors extending from another link of the plurality of links.

The invention relates to a connecting sleeve for anchoring shafts of two oppositely arranged prostheses, preferably on an elongate bone such as a femur or humerus. The reinforcing sleeve comprises two receiving bushes for one prosthesis shaft each and comprises a separable coupling region arranged therebetween for connection in such a manner as to resist shear forces and rotation. According to the invention, each receiving bush has, on the side thereof facing the coupling region, one fork of a pair of forks that interact with each other, and a fitting block is arranged on a base of the fork, the lateral surfaces of which fitting block have a distance that corresponds to an inner width of the fork, and the lateral surfaces are designed to contact flanks of the fork in a planar manner, at least one fastening screw being arranged transversely through the fork. The fork connection is simpler to produce than the known wedge connection and yet is sufficiently robust. Unlike in the case of the wedge connection, an exact fit is not required; a clearance fit between the fork and the fitting block is sufficient in principle, excessive play being eliminated by means of the fastening screw.

An extension-assisted hinged knee replacement comprises a femoral component, a tibial component, and a torque actuator operably interfacing the two components. The torque actuator is configured to apply extension torque based on the flexion angle of the knee, with the torque peaking between 0° and 90° of flexion. The implant may include a passive biasing element, which can be compressed or tensioned to enhance torque application, particularly during critical phases of knee extension.

The application relates to the technical field of medical devices, in particular to a hip joint spacer. The hip joint spacer comprises a spacer head, a femoral stem connected with the spacer head, Kirschner wires arranged in the spacer head and the femoral stem, an inner layer of the spacer head, an outer layer wrapped outside the inner layer, a through hole arranged on the outer layer to form a reserved channel, and the outer layer is communicated with the inner layer through the reserved channel. Compared with the prior art, the hip joint spacer has the advantages that the spacer head has an inner layer and an outer layer, the inner layer and the outer layer are made of different materials, the release time of antibiotics can be prolonged, the hip joint can maintain a high concentration of antibiotics, Kirschner wires are arranged in the spacer head and the femoral stem, the hip joint spacer has better mechanical strength than the prior art, can bear the weight of a patient, and can support the walking ability of the patient.

A method for implanting a telescopic nail may include providing a telescopic nail comprising a hollow stem, a rod inserted telescopically into the hollow stem, a first fastening element configured to couple to an end of the hollow stem for fixing to a first long bone end, and a second fastening element configured to couple to an end of the rod for fixing to a second long bone end. The end of the hollow stem couples to a coupling end of a perforating tool. The method further includes the steps of inserting the perforating tool opposite to the coupling end inside the cavity, coupling the end of the hollow stem of the telescopic nail together with a counter-coupler of the coupling end of the perforating tool, and advancing the perforating tool inside the cavity until it comes out completely from the other long bone end.

The invention discloses an integrated porous backbone prosthesis based on a 3D printing technology. The invention provides an integrated porous diaphysis prosthesis which comprises the following steps: 1, designing the integrated porous diaphysis prosthesis by utilizing a modular design method; 2, the permeability and mechanical property of the contact area are tested, the structure of the contact area is more similar to that of the thighbone through fusion design, and the porous structure provides conditions for bone cell growth; 3, biomechanical analysis and comparison are carried out on the bone cement type diaphysis prosthesis and the integrated porous diaphysis prosthesis, and it is found that the porous diaphysis prosthesis can reduce the stress shielding effect and promote bone tissue growth. The porous diaphysis prosthesis designed by the invention is more compactly attached to the femur and more conforms to the anatomical shape of the human body, and the force line of the lower limbs of the human body is prevented from being changed due to the structure of the prosthesis. The integrated porous backbone prosthesis simulates the structure of a natural bone to a great extent, the comprehensive performance is excellent, and bone cell growth, nutrient substance transportation and mechanical property support are improved to a great extent.

The invention provides an instrument for repairing femoral head defects, and belongs to the technical field of medical instruments. A guide pin, a guider, a chamfering cutter and a reamer; a guider cutting edge is arranged at the lower end of the guider, a center hole matched with the guide pin is formed in the guider, and the upper end of the guider is fixedly connected with a quick connector C; the guide needle is used as a common positioning reference to penetrate through the whole operation process, it is ensured that each step of operation from cartilage pre-cutting and defect area cutting forming to final reaming is accurately carried out along the preset axis, positioning deviation possibly occurring in a traditional method is effectively avoided, and due to the design of an observation hole in the guider and scale marks of a reamer rod body, the accuracy of the reamer is improved. Real-time and visual operation feedback and depth control are provided for doctors, visual and quantitative management of the operation process is achieved, and the accuracy of the prosthesis implantation position and the matching degree of bone bed forming are improved.

An endoprosthesis intended to replace a resected portion of bone and joint. The endoprosthesis can be non-invasively, manually operated to lengthen a patient's limb both intraoperatively and postoperatively. It includes bone anchoring components for anchoring to a first and second long bone, a joint to replace the function of an orthopedic joint, and a purely mechanical lengthening mechanism which can be located and operated manually by an operator by pressing on skin of a patient without requiring a surgical incision. The axle for joint is the actuating mechanism that lengthens the implant. The endoprosthesis does not need or include any magnets, electric motors, electric current, application of heat or a fluid displacement (hydraulic) system.

The present invention discloses a hip prosthesis femoral stem system, which belongs to the technical field of orthopedic implants. The hip prosthesis femoral stem system includes a plurality of femoral stems with gradually increasing stem lengths, and the femoral stem has a first proximal position P1. At the position P1, the distance from the central axis of the femoral stem body to the inner edge of the stem body is D1, and the range of D1 is 8.7-28.9. The hip prosthesis femoral stem system of the present invention is suitable for the ratio of the size of the human medullary cavity, can perform effective proximal medial press-fitting, and obtain good postoperative effects.

The present invention provides a distal plug prosthesis for blocking the distal femoral medullary cavity opening, comprising a prosthesis column and an annular skirt, wherein the prosthesis column has a head end and a tail end; the head end is tapered and suitable for drilling; a cover sheet is formed on the edges around the tail end, and the plane where the cover sheet is located forms an angle of 30-40° with the central axis of the prosthesis column; the annular skirt is at least two circles, formed on the outer cylindrical surface of the middle part of the prosthesis column. The distal plug prosthesis for blocking the distal femoral medullary cavity opening provided by the present invention fills the gap in the industry. During knee replacement surgery, when intramedullary positioning is used at the femoral end, after completing the positioning or before installing the prosthesis, a distal plug prosthesis of suitable specifications is selected to be directly plugged into the distal femoral medullary cavity opening, saving operation time, and there is no need to grind the patient's osteotomy block during the operation to re-form the bone plug. Moreover, the distal plug prosthesis is tightly sealed after being plugged in, and is not easy to fall off, be plugged too deep or fall into the medullary cavity, and can effectively block the distal femoral medullary cavity opening.