Total knee joint prosthesis

Abstract

The invention provides a total knee joint prosthesis which comprises a femoral condyle prosthesis and a tibia pad prosthesis, and the femoral condyle prosthesis is installed on the tibia pad prosthesis. A patella groove is formed in the outer side of the femoral condyle prosthesis, and a femoral condyle articular surface is arranged at the bottom of the femoral condyle prosthesis; the depth of the patellar groove extending downwards along the top of the outer side of the femoral condyle prosthesis is gradually increased. The femoral condyle prosthesis comprises a series of prostheses suitable for different people, and the radius and the center distance of the femoral condyle articular surfaces of the series of prostheses are different. A tibia pad prosthesis articular surface is arranged on the tibia pad prosthesis, the tibia pad prosthesis comprises a series of prostheses suitable for different people, and the radius and the center distance of the tibia pad prosthesis articular surface are different. The contact area between the femoral condyle prosthesis of the tibia pad prosthesis and the femoral condyle prosthesis is large, the abrasion of pressure and polyethylene is reduced, and the stability is high; the radiuses and the center distances of adjacent series of the femoral condyle prosthesis and the tibia pad prosthesis are close, so the shapes of articular surfaces of adjacent models are similar, and the probability of abrasion and looseness is reduced.

Description

[0001] This application is a divisional application with application number 202010274036.4, application date 20200409, and invention name "A Total Knee Prosthesis". technical field [0002] The invention relates to the field of knee joint prosthesis, in particular to a total knee joint prosthesis. Background technique [0003] Currently, the patella accounts for a large proportion of the postoperative adverse reactions of the existing artificial knee prosthesis, such as patella pain, patella snapping, and patella instability. The main reason is that the design of the prosthesis cannot meet individual differences. If the patellar trochlear groove is too wide, it may cause instability of the patella, while if the patella trochlear groove is too narrow, it may cause pain or insufficient flexion function of the patella. When the femoral condyle is matched with different types of tibial pad prosthesis, the arc of the femoral condyle and the tibial pad prosthesis often do not matc...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a total knee prosthesis, which is used to solve the problems of poor stability, easy wear and poor fit of the articular surface in the prior art when the prosthesis is implanted

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