Force-closed knee replacement prosthesis

Abstract

The invention discloses a force-closed knee replacement prosthesis which is composed of a thighbone prosthesis, a thighbone support, a shin bone support, a rotating link rod component, an anterior cruciate ligament branched chain and a posterior cruciate ligament branched chain; the thighbone prosthesis is arranged on the thighbone support, and the rotating link rod component, the anterior cruciate ligament branched chain and the posterior cruciate ligament branched chain are arranged between the thighbone support and the shin bone support. The patellar surface profile of the thighbone prosthesis is a 3D thighbone patellar surface profile which is re-built by thighbone CT / MRI scanning based on knee joints of a replaced person. In the force-closed knee replacement prosthesis, the anterior cruciate ligament branched chain adopts a fixed long rod piece structure, and the posterior cruciate ligament branched chain adopts a spherical hinge with a spring structure to be connected, so as to avoid the phenomenon of negative bending angle and overlarge bending angle in the bending / stretching process of the joints and be capable of realizing bending movement of the knee joint prosthesis within a range of from 0 degree to 135 degrees.

Description

technical field [0001] The invention relates to a joint replacement prosthesis, more particularly, a force-closed joint replacement prosthesis used for knee joints, which belongs to medical devices. Background technique [0002] At present, the application of orthopedic artificial joints is becoming more and more extensive, and has restored joint function for many joint patients. At present, most of the existing artificial joints are of open structure, and the phenomenon of loosening between the femoral prosthesis and the tibial prosthesis is easy to occur. In addition, the prosthesis High-level joints are often used between components, which will cause a lot of wear on the contact parts, and in severe cases, it will lead to secondary operations and joint lesions caused by abrasive particles. Contents of the invention [0003] The object of the present invention is to provide a force-closed knee replacement prosthesis. The prosthesis imitates the biological structure desig...

AI Technical Summary

Problems solved by technology

[0002] At present, the application of orthopedic artificial joints is becoming more and more extensive, and has restored joint function for many joint patients. At present, most of the existing artificial joints are of open structure, and the phenomenon of loosening between the femoral prosthesis and the tibial prosthesis is easy to occur. In addition, the prosthesis High-level connections are often used between parts, which will cause a lot of wear on the contact parts, and in severe cases, it will lead to secondary operations and joint lesions caused by abrasive particles

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