Tibial prothesis anti-shift fixator for unicompartmental knee arthroplasty

Abstract

The invention provides a tibial prothesis anti-shift fixator for unicompartmental knee arthroplasty and belongs to the technical field of surgical assist equipment. The tibial prothesis anti-shift fixator for unicompartmental knee arthroplasty comprises a fixing portion, a connection portion and a handheld portion; the fixing portion is connected with the handheld portion via the connection portion; the fixing portion includes an upper fixing portion and a lower fixing portion; the upper fixing portion is a metal rod in flat square shape; a soft pad is arranged at the inner side of the surfaceof the front of the metal rod; the lower fixing portion is a pin that may be inserted into a reserved marrow channel; the connection portion includes two connection rods that are intersected and rotationally connected; the rear end of one connection rod is fixedly connected with the front end of one shank, and the front end of the connection rod is fixedly connected with the rear end of the metalrod; the rear end of the other connection rod is fixedly connected with the front end of the other shank, and the front end of the connection rod is fixedly connected with the rear end of the pin. The tibial prothesis anti-shift fixator for unicompartmental knee arthroplasty helps provide firm fixation for a tibial prothesis and is simple to perform, drilling bone is not required as the originalmarrow channel is used, and the design of the soft pad at the prothesis contact face helps protect the prothesis and prevent iatrogenic abrasions.

Description

technical field [0001] The invention belongs to the technical field of surgical operation auxiliary equipment, in particular to a tibial prosthesis anti-displacement fixer for unicondylar replacement. Background technique [0002] At present, unicondylar knee arthroplasty (UKA) has been widely used clinically and has achieved good surgical results. The advantages are small trauma, small incision, and light trauma. Excellent surgical results require accurate prosthesis placement. In clinical practice, when the femoral and tibial prostheses are installed on the bone through bone cement, the meniscus trial mold should be used before the bone cement has hardened. Extrude the excess bone cement to create a suitable space. When the meniscus is taken out for trial, the bone cement is not completely solidified at this time, and the fixation is unstable, which often causes the tibial prosthesis to shift or tilt, and needs to be relocated. The effect of surgery. [0003] At present,...

AI Technical Summary

Problems solved by technology

Excellent surgical results require accurate prosthesis placement. In clinical practice, when the femoral and tibial prostheses are installed on the bone through bone cement, the meniscus trial mold should be used before the bone cement has hardened. Extrude the excess bone cement to create a suitable space. When the meniscus is taken out for trial, the bone cement is not completely solidified at this time, and the fixation is unstable, which often causes the tibial prosthesis to shift or tilt, and needs to be relocated. Effect of surgery

[0003] At present, there is no suitable clinical tool to solve the above problems. We can only wait for the bone cement to harden completely before taking it out, which is a waste of time and makes it difficult to remove the residual bone cement; or it is hoped that the surgeon will operate carefully.

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