Pull limiting system for knee joint revision

Abstract

The invention discloses a beating and pulling limiting system for knee joint revision. The beating and pulling limiting system comprises a beating and pulling device. The instrument is located on one side of the beating and pulling device and connected with the beating and pulling device; the limiter is connected with the beating and pulling device and is used for limiting the beating and pulling depth of the beating and pulling device; wherein the limiting stopper comprises a limiting stopper body, and the limiting stopper body is in sliding connection with the beating and pulling device; the button is located on one side of the limiting stopper body and rotationally connected with the limiting stopper body, and lock teeth are arranged at one end of the button and correspond to a plurality of teeth arranged on the striking and pulling device; one end of the elastic body abuts against the limiting stopper body, and the other end of the elastic body abuts against the button. According to the punching and pulling limiting system, the osteotomy action on the thighbone side is combined with the hole filing action, the operation of an intramedullary rod is replaced with the punching and pulling device, the osteotomy amount is determined with the hole filing depth as the reference, and the technical effects that the number of operation steps is reduced, the operation reference is unified, and the osteotomy precision is improved can be achieved.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a knock-out limiting system for knee joint revision. Background technique [0002] In recent years, the number of knee joint revision cases has increased significantly. One important reason is the sharp increase in the number of primary total knee replacement cases. Another factor is that the patients receiving knee joint replacement are getting younger and younger. Surgery to meet their high-activity needs. There is also a factor that cannot be ignored - weight, which is particularly evident in Western countries. Scholars such as KurtzS predict that the increase in knee revision surgery in the United States will greatly exceed that of primary total knee replacement / primary total hip replacement / hip revision surgery. [0003] However, in the existing joint revision surgery, there are still some shortcomings: [0004] 1. In the existing revision surgery, the opening of t...

AI Technical Summary

Problems solved by technology

[0004] 1. In the existing revision surgery, the opening of the distal femur and the proximal tibia is done by reaming with a reamer. The formed reaming has a low degree of matching with the shape of the actual implanted revision prosthesis, resulting in false positives. There is a difference in the implantation height of the body or the stability is low;

[0005] 2. In the prior art, the depth of the opening is difficult to control, which also leads to a low degree of matching with the prosthesis;

[0006] 3. In the prior art, the osteotomy and reaming actions are separated. Both the osteotomy and reaming actions need to be based on the mechanical axis of the femur, that is, two reference positionings are required. Defects of poor bone precision

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