Artificial knee joint

Abstract

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.

Description

technical field [0001] The invention relates to an artificial knee joint. Background technique [0002] Artificial knee replacement surgery has become a relatively common surgical operation in the medical field. The artificial knee joint usually consists of a femoral condyle prosthesis, a tibial plateau prosthesis, and a joint liner made of ultra-high molecular polyethylene. The pad is clamped on the tibial plateau prosthesis and between the femoral condyle prosthesis and the tibial plateau prosthesis. During the operation, the femoral condyle prosthesis and the tibial plateau prosthesis are bonded to the femoral end and neck bone of the patient respectively with bone cement. At the end, the femoral condyle prosthesis can move relative to the joint liner, thereby forming an artificial knee joint that allows the patient to effectively return to normal previous motion. However, since there are some gaps between the bone cement and the femoral end and the cervical bone end, th...

AI Technical Summary

Problems solved by technology

However, since there are some gaps between the bone cement and the femoral end and the cervical bone end, the friction between the articular surface and the joint liner of the artificial knee joint after the operation will gradually generate microscopic debris, and these microscopic debris will be absorbed by macrophages. Osteolysin produced after the phagocytosis of cells penetrates into the gap between the bone cement and the femur and tibia will cause the bone tissue around the artificial knee joint to gradually dissolve, eventually leading to the loosening of the artificial knee joint

Images