31 results about "Femur condyle" patented technology

Customized hemi-knee joint prosthesis and a preparation method thereof are provided. Firstly, the normal side knee joint femur condyle data of a patient is extracted by CT for the medical image three-dimensional image reconstruction. The three-dimensional anatomy model of patient femur condyle is obtained by an antagonizing model. A metal femur condyle joint is obtained according to the three-dimensional anatomy model. Then, a rolling pillar is arranged in the metal femur condyle joint. The two sides of the rolling pillar are respectively opened with a cylindrical groove. A rolling combined station is sheathed on the rolling pillar. The two sides of the rolling combined station are respectively equipped with a side-push plate with a lug boss. The lug bosses of the side-push plates are inserted in the grooves of the rolling pillars. As the rolling pillar is arranged inside the articular surface of the metal femur condyle of the hemi-knee joint prosthesis, the prosthesis upper part, namely the rolling combined station, and the lower part, namely the articular surface of the metal femur condyle, which are fixed on a femoral shaft move relatively within a certain angle. Being corresponding to a tibia platform, the lower part is static during the period. Therefore, the whole process of the knee joint bending is finished and the abrasion of the prosthesis on the cartilage surface of the joint is reduced.

The invention relates to an artificial knee joint comprising a femur condyle prosthesis, a tibial plateau prosthesis and a joint pad. The femur condyle prosthesis is provided with a joint surface, a condyles jointing surface, an inter-condyles jointing surface, a positioning pin and an intramedullary handle. The tibial plateau prosthesis is provided with a plateau body, a tibia jointing surface, a positioning piece and a tibia intramedullary handle. The condyles jointing surface, the inter-condyles jointing surface, the surface of the positioning pin, the surface of the intramedullary handle, the tibia jointing surface, the surface of the positioning piece and the surface of the tibia intramedullary handle together constitute an osseous jointing surface. Part or all of the osseous jointing surface is integrated into a whole so as to form a three-dimensional net body. The surface of the three-dimensional net body is provided with a plurality of holes extending from the surface to the inside. Horizontal passages communicated with part or all of the holes are arranged inside the three-dimensional net body. The horizontal passages of the three-dimensional net body are single-layer or multi-layer passages. The artificial knee joint has the advantage of long-time looseness prevention.

The invention provides a knee joint prosthesis, which comprises a tibia platform, a femur condyle component and a spacer component, wherein the femur condyle component is positioned above the tibia platform and comprises an inner condyle joint surface and an outer condyle joint surface, and the inner condyle joint surface and an outer condyle joint surface have a height difference H; the spacer component is positioned between the tibia platform and the femur condyle part and comprises an inner side spacer cooperated with the inner condyle joint surface, and an outer side spacer cooperated withthe outer condyle joint surface; a position, which corresponds to the outer side spacer, on the upper surface of the tibia platform is provided with a first spherical convex surface; the outer side spacer is movably arranged on the prosthesis platform; and in addition, the lower surface of the outer side spacer is provided with a first spherical concave surface cooperated with the first sphericalconvex surface. According to the technical scheme of the invention, the problem in the relevant art that the knee joint prosthesis is likely to abrade can be effectively solved.

A combined organic polymer material artificial knee joint, including femoral condyle and tibial support of polyetheretherketone (PEEK) or its derivatives and tibial liner of ultra-high molecular weight polyethylene (UHMWPE), wherein the tibial support includes a platform and The positioning part of the stabilizer wing perpendicular to it; the upper end and the lower end of the tibial liner are respectively engaged with the femoral condyle and the platform; the femoral condyle has a buffer for the sliding surface of the tibial liner; The sliding surface against the tibial liner matches the fretting of the tibial tray against the tibial liner. The main parts of all implant parts of the present invention are made of polymer materials, which reduces the allergies and toxicity problems that metals and their corrosion may cause; the elastic modulus of PEEK matches the natural bone, which reduces the stress shielding problem; the PEEK femoral condyle and The tibial tray combines the sliding surface and the fixed surface of the UHMWPE tibial liner with micro-movement, which greatly reduces the wear problem. At the same time, the reinforcement and development parts are added to further improve the practicality.

The invention discloses an energy saving damping bionic knee joint for a biped walking robot; the energy saving damping bionic knee joint comprises a bionic femur, a bionic tibia and a bionic kneecap; a cylinder is fixedly connected on a femur condyle connector through a cylinder support; leg extension motions of the knee joint is completed by cylinder active acting; the bionic femur condyle makes contacts with a third roller through a first slide rail, so a meniscus assembly can support and guide the bionic femur condyle; a second roller rolls in a second slide rail so as to simulate mankind knee joint instant center change motions; the second slide rail has two motion limit positions so as to limit the knee joint motion scope; a kneecap assembly uses the motions of the first roller in the first slide rail to simulate mankind kneecap, thus increasing an acting force arm of the cylinder output force in the leg extension motions, and saving energy; the bionic femur condyle, bionic kneecap and meniscus assembly are employed to realize knee joint instant center change motions, low energy consumption, and high buffer performance.

The invention relates to an osteotomy navigation device for total knee arthroplasty and belongs to the technical field of surgical instruments. The osteotomy navigation device comprises a substrate fit with femur condylar bone surfaces, a marrow entering sleeve and positioning sleeves arranged on the outer side of the substrate as well as a limit wall arranged on the inner edge of the substrate and extending outwards, the inner hole axis of the marrow entering sleeve coincides with the center of femur marrow cavity, one positioning sleeve is arranged on each of two sides of the lower side of the marrow entering sleeve, the two positioning sleeves are fixed on the femur condylar bone surfaces, the connection line of centers of end surfaces of the two positioning sleeves coincides with the rotating axis of the femur condyle, the limit wall at least comprises an inner side front end wall, an inner side left end wall and an inner side right end wall. By initial limit and connection and fixation of the positioning sleeves and the femur condylar bone surfaces, a guide is firmly connected and fixed with the femur condylar bone surfaces, the axis of the marrow entering sleeve coincides with the center of the femur marrow cavity and the connection line of centers of end surfaces of the two positioning sleeves coincides with the rotating axis to construct a real-time coordinate system toprovide basis reference for surgery.

The invention relates to the field of medical instrument design, in particular to a unicompartmental prosthesis matched with a posterior condyle of a femur, which comprises a joint friction surface, a bone cement binding surface, a distal condyle binding surface and a posterior condyle binding surface of the femur condyle which are integrally formed, the joint friction surface, the bone cement binding surface and the distal condyle binding surface of the femur condyle are three concentric spherical surfaces with different radiuses, the curvature radius RI of the joint friction face is larger than the curvature radius RII of the bone cement binding face, the curvature radius RII of the bone cement binding face is larger than the curvature radius RIII of the femoral condyle far-end binding face, and the femoral condyle posterior condyle binding face is a vertical plane and intersects with the femoral condyle far-end binding face to form an osseointegration face to be matched with a matched bone. According to the product provided by the invention, by changing the design of the bone binding surface of the single-condylar prosthesis, the movable single-condylar prosthesis is more adaptive to the posterior condyle of the femur, and the flexion and extension balance of the knee joint is more accurate, so that postoperative complications are reduced.

Customized hemi-knee joint prosthesis and a preparation method thereof are provided. Firstly, the normal side knee joint femur condyle data of a patient is extracted by CT for the medical image three-dimensional image reconstruction. The three-dimensional anatomy model of patient femur condyle is obtained by an antagonizing model. A metal femur condyle joint is obtained according to the three-dimensional anatomy model. Then, a rolling pillar is arranged in the metal femur condyle joint. The two sides of the rolling pillar are respectively opened with a cylindrical groove. A rolling combined station is sheathed on the rolling pillar. The two sides of the rolling combined station are respectively equipped with a side-push plate with a lug boss. The lug bosses of the side-push plates are inserted in the grooves of the rolling pillars. As the rolling pillar is arranged inside the articular surface of the metal femur condyle of the hemi-knee joint prosthesis, the prosthesis upper part, namely the rolling combined station, and the lower part, namely the articular surface of the metal femur condyle, which are fixed on a femoral shaft move relatively within a certain angle. Being corresponding to a tibia platform, the lower part is static during the period. Therefore, the whole process of the knee joint bending is finished and the abrasion of the prosthesis on the cartilage surface ofthe joint is reduced.

An artificial knee joint comprises a femoral condyle prosthesis and a tibial plateau prosthesis; wherein the tibial plateau prosthesis includes a medial tibial plateau prosthesis and a lateral tibial plateau prosthesis disposed at both sides of the tibial plateau intercondylar eminence, respectively. The artificial knee joint further comprises a locating pin for fixing the tibial plateau prosthesis. The bottom surface of the tibial plateau prosthesis is provided with a prosthetic notch, and the tibia below the tibial plateau prosthesis is provided with a tibial notch. The prosthetic notch corresponds to the tibial notch, together forming a limiting hole for accommodating the locating pin. The cooperation between the locating pin and the limiting hole can ensure relative position stability and balance between the medial tibial plateau prosthesis and the lateral tibial plateau prosthesis.

The invention belongs to the technical field of medical device design, and in particular relates to a CR-type and PS-type femoral condyle trial mold and an intercondylar processor function integrated structure, including an intercondylar milling cutter, a femoral condyle trial mold, an intercondylar trial mold, an intercondylar Processor and intercondylar osteotome, the intercondylar joint surface of described femoral condyle trial mold is matched with the joint curved surface of intercondylar trial mold; Described intercondylar processor comprises insertion end and connecting end, and described insertion end can be inserted with it In the intercondylar processor connecting hole on the matching femoral condyle trial mold, the connecting end can be connected with the intercondylar milling cutter and the intercondylar bone knife. The invention has the advantages of replacing the optimal operation plan and supporting tools at any time; reducing the number and cost of tools; ensuring the accuracy of the installation position of the prosthesis, reducing the mutual matching of various parts during the operation; and realizing effective bone saving.

The invention relates to a knee endoprosthesis comprising a femoral component (1) which has two condyle surfaces (1a, 1b) for anchoring on the distal femur, comprising a tibial component (2) for anchoring on the proximal tibia, and comprising sliding surfaces between the two components (1, 2). The aim of the invention is a knee endoprosthesis which has as little abrasion as possible while optimally reproducing the anatomical and kinematic properties of the natural knee joint, in particular by means of suitable combinations of materials and by reducing the abrasion-generating surfaces. This isachieved in that the entire femoral component (1), but at least the condyle surfaces (1a, 1b) thereof, for articulating with the tibial component (2) consists of a rigidly sintered ceramic, and the tibial component (2) comprises a tibial baseplate (11) consisting of a rigidly sintered ceramic, said baseplate having a medial spherical bearing shell (7) on the baseplate upper face facing the femoralcomponent (1). The medial spherical bearing shell (7) is an integral component of the tibial baseplate (11) and is integrally formed with the tibial baseplate, and the articulation surface of the medial femur condyle (1a) is likewise spherically shaped and together with the medial spherical bearing shell (7) constitutes a congruent ball joint. A bearing shell (8) which allows the rotation of thefemoral component (1), is made of multiple radii in the anterior-posterior direction, and is arranged non-congruently with the femur condyle (1b) is arranged laterally adjacent to the medial sphericalbearing shell (7), said bearing shell (8) either being formed integrally with the tibial baseplate (11) or being an inlay which is movable relative to the tibial baseplate (11).

The present invention is one kind of artificial total knee replacement prosthesis of rebuildable anterior cruciate ligament, which comprises tibia plant holder piece and pad; tibia plant holder piece comprises horizontal plant and member bar fastened together, top surface of pad has double horizontal spaced spherical concave surface to receive separated one part of femur condyle. Designing a pore path both on pad and tibia plant holder piece, which penetrate separated the horizontal plants of pad and tibia plant holder piece and connect to each other, makes anterior cruciate ligament can cross the pore path and be fixed of two ends separated femur external malleolus and tibia down horizontal plant of tibia plant holder piece, realizes rebuilding of anterior cruciate ligament in artificial total knee replacement.

The invention relates to a method for manufacturing a navigation template for knee replacement. The method comprises the following steps of: scanning a hip joint, a knee joint and an ankle joint through computed tomography (CT) to obtain CT data, and establishing three-dimensional reconstruction models of femur and tibia according to the CT data; respectively carrying out combination on the three-dimensional reconstruction models of thigh bone and shin bone with a three-dimensional structure, and respectively removing the three-dimensional structure models of femur and tibia from the three-dimensional structure; according to the knee replacement process, carrying out distal femoral virtual osteotomy on the three-dimensional structure model containing the femur contour, and carrying out proximal tibia virtual osteotomy on the three-dimensional structure model containing the tibia contour; and establishing virtual femur condyle navigation template and a virtual tibia platform navigation template, and manufacturing an entity condyle navigation template and an entity tibia platform navigation template. The individual navigation template manufactured by the invention be used for carrying out positioning of osteotomy and a rotating axis on the affected knee femur condyle and tibia platform, thus realizing individual precise osteotomy.

The invention relates to a new axial center type knee joint prosthesis comprising a femur intramedullary pin, a femur condyle, connecting components and a tibia intramedullary pin, also comprsing a tibia platform and a femur sleeve, wherein, the femur condyle is provided with a positioning slot and is fixed at lower part of the femur intramedullary pin; the tibia platform is provided with a centre hole and is fixed at the upper part of the tibia intramedullary pin for holding the femur condyle; the connecting components are T-shaped and comprise a transverse shaft and a vertical shaft, the vertical shaft is inserted into the centre hole of the tibia platform, the transverse shaft is rotatable arranged through the lower part of the femur condyle; the femur sleeve is sleeved at the lower part of the femur intramedullary pin and are butted with the positioning slot of the femur condyle. The new axial center type knee joint prosthesis of the invention can completely recovery the functions of extending and bending, and inward and outward rotating of the knee joint and adopt the bionic molding, the stability is good, the movement requirement of the patient can be satisfied sufficiently under the precondition of protecting limbs, the patient can recovery the movement freely like originally.

The invention provides a flexible anti-impact bionic pulled and pressed body knee joint, belonging to the technical field of robots. The flexible anti-impact bionic pulled and pressed body knee jointcomprises pressed bodies (the bionic femur and the bionic tibia) and pulled bodies (the bionic flexible ligaments), wherein the pulled bodies are connected with the pressed bodies, so that a bionic knee joint structure is formed; the prestrain and the material attribute of the pulled bodies are adjustable, so that various speeds and loading states of a bipedal robot can be adapted. The appearancessimulating the human skeleton curve of the bionic femur condyle and the bionic tibia condyle enable the knee joint to be capable of generating the rotation with three degrees of freedom, in the faceof the high speed or large load, the rotation in the frontal plane and the cross section can effectively alleviate the impact of the external force or the moment of force. The pulled bodies and the pressed bodies are connected to form a space three-dimensional topological structure, when disturbance of the external load is applied, the force is transmitted to the other pressed bodies and pulled bodies through the topological structure, finally, a passive self-stabilizing structure without the need of energy input is formed, the multi-dimension mechanical impedance can be resisted, the controlis simplified, and the energy consumption is reduced.