Unicompartmental knee prothesis

Abstract

The invention belongs to the field of medical instruments and discloses a unicompartmental knee prothesis, comprising a femoral condyle, a flat carrier and a flat pad arranged between the femoral condyle and the flat pad; the femoral condyle includes a first arc face matching with the flat pad and a second arc face opposite the first arc face; first and second fixing posts on a center line of thesecond arc face are formed on the second arc face; when the femoral condyle is in the initial state, the axis of the first fixing post is perpendicular to the horizontal plane, the axis of the secondfixing post and the axis of the first fixing post form an included angle. The unicompartmental knee prothesis can be fixed better to the human bone tissues, thereby effectively improving the stabilityof the unicompartmental knee prothesis in the human body after unicompartmental knee arthroplasty, and further effectively ensuring normal kinematic characteristics of the knee.

Description

technical field [0001] The invention belongs to the field of medical devices, in particular to a unicondylar knee joint prosthesis. Background technique [0002] A unicompartmental knee prosthesis is a surgical implant used to replace the knee joint and is used in unicompartmental knee replacement surgery. Compared with total knee replacement surgery, unicompartmental knee replacement surgery can significantly reduce intraoperative bleeding and postoperative recovery time. Because it retains the anterior and posterior cruciate ligaments of the human body, it maintains the normal knee joint Dynamics, so that patients can get a higher level of postoperative knee mobility. [0003] For unicompartmental knee replacement surgery, whether the unicompartmental knee prosthesis can be stably and firmly matched in the patient's body is crucial to the success of the operation, and it can also reduce the postoperative pain of the patient and reduce postoperative revision possibility. ...

AI Technical Summary

Problems solved by technology

However, the femoral condyle in the existing knee joint prosthesis is usually provided with one or more parallel fixed columns for fixed connection with the femur of the human body. The postoperative fixation effect is not ideal, and it is easy to cause The fixation between the femoral condyle and the femur is loose; in addition, in the existing knee prosthesis, the surface of the femoral condyle that cooperates with the platform pad is usually a curved surface, which causes the femoral condyle to move relative to the platform pad. It cannot always keep in close contact with various parts of the platform pad, which will cause the platform pad to easily fall out of the platform support; in addition, in the existing knee joint prosthesis, a protruding fixing plate is usually formed on the bottom surface of the platform support to prevent It is used for fixing with the bone tissue of the human body. A groove-shaped hole is usually formed on the fixing plate to facilitate bone ingrowth, but the opening area of ​​this type of groove-shaped hole is relatively large, and the fixation effect after bone ingrowth is not ideal

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