7 results about "Prosthesis Loosenings" patented technology

The application discloses a prosthesis system for minimally invasive femoral head replacement, which comprises a bone cutting assembly, a prosthesis, an extension rod, a guide frame and a locking nail. In the operation, only a small opening is needed on the lateral side of the femoral neck, and then a channel is established, and the prosthesis is implanted in the channel, so that the degree of trauma, the operation time and the blood loss are greatly reduced. A detachable extension rod is arranged on the implanted prosthesis, and after the extension rod is positioned by cooperating with the guide frame, the extension rod can guide the path of the locking nail, so that the locking nail is connected with the prosthesis, and is fixed with the large and small trochanters of the patient, so that the prosthesis can be combined with the relatively hard bone and the surface layer of the femoral neck to achieve stable combined support and avoid loosening of the prosthesis.

The present application relates to the technical field of orthopedic artificial joint design and manufacturing, in particular to an intervertebral disc prosthesis and a preparation method thereof. The first plate body of the intervertebral disc prosthesis is provided with a semispherical groove on the side away from the first fixing seat; the second plate body is provided with a connecting slot on the side away from the second fixing seat; the nucleus pulposus prosthesis comprises a semispherical convex surface and a base, the semispherical convex surface is movably connected with the semispherical groove, and the base is connected with the connecting slot; the surfaces of the first plate body and the second plate body are both provided with gradient trabeculae, and the surfaces of the semispherical groove and the semispherical convex surface in contact with each other are both metal ceramic interfaces formed by zirconium-niobium surface oxidation. The upper end plate of the intervertebral disc prosthesis can keep relative movement with the nucleus pulposus prosthesis, and the contact friction interface of the relative movement is a metal ceramic interface formed by zirconium-niobium surface oxidation, so that the friction surface can reduce abrasion to the greatest extent, the wear resistance of the prosthesis is improved, the service life of the prosthesis is prolonged, the loosening of the prosthesis is improved, the metal allergic reaction and metal artifacts are reduced.

The application discloses a knee joint prosthesis system and a preparation method, wherein the femoral condyle prosthesis, the tibial plateau pad prosthesis, the tibial plateau prosthesis and the patellar prosthesis are made of zirconium niobium alloy, so that the sliding friction contact surfaces of the tibial plateau pad prosthesis, the patellar prosthesis and the femoral condyle prosthesis are metal ceramic interfaces formed by oxidation of zirconium niobium surfaces, the wear rate is lower, the active wear of the joint prosthesis can be effectively reduced, the service life of the joint prosthesis is prolonged and the failure rate is reduced, meanwhile, the risk of osteolysis caused by debris generated by wear of a traditional prosthesis due to an ultra-high molecular weight polyethylene tibial plateau pad prosthesis, and further triggering the risk of loosening of the prosthesis, can be avoided. Moreover, the bone integration interfaces of the femoral condyle prosthesis, the tibial plateau prosthesis and the patellar prosthesis are zirconium niobium alloy trabecular structures, so that the zirconium niobium alloy trabecular structures have excellent biocompatibility, are convenient to combine with the bone tissue of a patient and can improve the bone integration efficiency of the frame body and the bone tissue.

This application relates to the field of orthopedic artificial joint design and manufacturing technology, and in particular to a metal-ceramic reverse-type shoulder joint prosthesis system and its preparation method. The metal-ceramic reverse-type shoulder joint prosthesis system includes a humeral stem prosthesis, a humeral support prosthesis, a reverse-type glenoid head prosthesis, a taper adapter prosthesis, and a glenoid support prosthesis connected sequentially. The sliding contact surface of the humeral support prosthesis is adapted to the contact surface of the reverse-type glenoid head prosthesis, and both the humeral support prosthesis and the reverse-type glenoid head prosthesis are manufactured using 3D-printed zirconium-niobium alloy. A metal-ceramic interface layer formed by the oxidation of zirconium-niobium surfaces is provided between the humeral stem prosthesis and the humeral support prosthesis, between the humeral support prosthesis and the reverse-type glenoid head prosthesis, between the reverse-type glenoid head prosthesis and the taper adapter prosthesis, and between the taper adapter prosthesis and the glenoid support prosthesis. This application offers advantages such as longer service life, high wear resistance, low wear rate, no osteolysis, and no prosthesis loosening.

This application relates to the field of orthopedic artificial joint design and manufacturing technology, and in particular to a metal-ceramic total shoulder joint prosthesis system and its preparation method. The metal-ceramic total shoulder joint prosthesis system includes a humeral stem prosthesis, a tapered adapter prosthesis, a humeral head prosthesis, and a glenoid fossa prosthesis connected sequentially. The humeral head prosthesis and the tapered adapter prosthesis are both formed using 3D zirconium-niobium metal printing or forging. The humeral stem prosthesis and the glenoid fossa prosthesis are integrally formed using 3D printed zirconium-niobium alloy. A metal-ceramic interface layer formed by the oxidation of the zirconium-niobium surface is provided at the relative motion contact surface of the humeral head prosthesis and the glenoid fossa prosthesis. The metal-ceramic total shoulder joint prosthesis system provided by this application has advantages such as longer service life, high wear resistance, low wear rate, no osteolysis, and no prosthesis loosening.

The present application relates to a kind of knee joint prosthesis and its manufacturing method, wherein the knee joint prosthesis includes tibial platform prosthesis, tibial platform prosthesis has osteotomy fitting area;Osteotomy fitting area includes integration area, anchoring area and transition zone;Integration area is positionally corresponding with host cancellous bone area, for inducing bone tissue growth to realize long-term biological fixation;Anchoring area is positionally corresponding with host sclerotic bone area or cortical bone area, realizes immediate fixation by mechanical interlocking;Transition zone is located between integration area and anchoring area, and the porosity of transition zone gradually decreases along the direction of integration area to anchoring area, and structural rigidity gradually increases along the direction of integration area to anchoring area, its beneficial effect is, the active adaptation of prosthesis and host bone bed non-uniform biological characteristics is realized, immediate mechanical stability and long-term biological integration effect are obtained under the premise of not needing permanent screw auxiliary fixation, the risk of prosthesis loosening is reduced, and the clinical service life of prosthesis is effectively prolonged.

This invention provides a combined hip joint revision filler structure, comprising: an iliac wing assembly, which includes an acetabular cup support and an iliac wing fixation portion integrally formed on the acetabular cup support; the outer side of the acetabular cup support is used to fit and provide support to the patient's acetabular cup, and the inner side of the iliac wing fixation portion is used to fit and fix to the patient's iliac wing; and a filler block, which is fixed to the iliac wing assembly and includes a fusion surface for fitting the patient's hip defect bone from below and a contact surface for fitting the inner side of the acetabular cup support. This invention improves the stability of the fixation structure by fitting and fixing the inner side of the iliac wing fixation portion to the patient's iliac wing, and also improves the convenience of subsequent positioning and screw placement. Simultaneously, the filler block also meets the need to fill hip defect bone, solving the problems of difficult positioning and screw placement of existing pre-made metal acetabular pads, and the inability to fill bone defects, which easily leads to acetabular prosthesis loosening.