4 results about "Knee arthrodesis prosthesis" patented technology

This invention provides a fixation device and assembly method for pericondylar fractures of the knee joint prosthesis. The knee joint prosthesis includes a femoral condyle, a tibial plateau, and a tibial pad. The femoral condyle includes an anterior condyle, two posterior condyles, and an intercondylar fossa. A fixation device is installed in the intercondylar fossa, comprising an intramedullary fixation pin and a connecting fixation block. The connecting fixation block is installed within the intercondylar fossa and engages with the force-applying end of the intramedullary fixation pin. The connecting fixation block includes a main body with a top surface facing the tibial pad and a bottom surface opposite the top surface. The bottom surface extends away from the top surface to form a protrusion, and a through hole is formed within the protrusion, which is used to accommodate and fix the force-applying end of the intramedullary fixation pin. This invention embeds the entire connecting fixation block within the intercondylar fossa, fully utilizing the existing intercondylar fossa space of the PS-type prosthesis to establish a precise channel for the intramedullary fixation pin, thereby fixing the pericondylar fracture through structural fit.

The application provides a knee joint prosthesis periprosthetic fracture fixation device and an assembling method. The knee joint prosthesis comprises femoral condyles, a tibial plateau and a tibial pad. The femoral condyles comprise an anterior condyle, two posterior condyles and an intercondylar fossa. The fixation device is installed at the intercondylar fossa. The fixation device comprises an intramedullary fixation needle and a connecting fixation block. The connecting fixation block is installed in the intercondylar fossa. The connecting fixation block is connected with the force applying end of the intramedullary fixation needle. The connecting fixation block comprises a main body. The main body has a top surface facing the tibial pad and a bottom surface opposite to the top surface. The bottom surface extends in a direction away from the top surface to form a protruding part. A through hole penetrating through the main body is formed in the protruding part. The through hole is used for accommodating and fixing the force applying end of the intramedullary fixation needle. The whole connecting fixation block is embeddedly installed in the intercondylar fossa. The original intercondylar fossa space of the PS type prosthesis is fully utilized to establish a precise channel of the intramedullary fixation needle. The periprosthetic fracture is fixed through structural cooperation.

The invention relates to a spacer mould used in the field of health, particularly in orthopaedics and traumatology, during the treatment of infections around knee prostheses. The invention particularly relates to a modular spacer mould for the femur, having detachable moulds that allow the length to be adjusted by means of a toothed structure and that enable the antibiotic cement to be shaped in the desired size.

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.