Auxiliary knee arthroplasty clearance balance tool

Abstract

The invention discloses an auxiliary knee arthroplasty clearance balance tool. The clearance balance tool includes a first assembly and a second assembly; the first assembly includes a base and a columnar rod perpendicular to the base; the second assembly includes a first board and a second board, the first board and the second board are perpendicularly arranged, the second board is perpendicularto the upper surface of the base, and a hollow short column is in pivot joint with the front wall surface of the second board and is provided with a through hole. The first assembly and the second assembly are movably connected to the hollow short column through the columnar rod; a distance measurement mechanism is arranged on the upper surface of the base. The tool is simple and practical, and therefore an assistance can be provided for improving the accuracy of surgery.

Description

technical field [0001] The invention relates to an auxiliary knee joint replacement gap balance tool, which belongs to the field of knee joint replacement medical devices. Background technique [0002] Knee arthroplasty is currently one of the commonly used surgical methods in the clinical treatment of end-stage knee osteoarthritis, traumatic arthritis, rheumatoid and other diseases. Aspects: one is osteotomy of femur and tibia, and the other is soft tissue balance. The ultimate goal of osteotomy is to obtain a rectangular flexion and extension gap. In order to obtain a rectangular knee flexion gap, the commonly used osteotomy methods in clinical practice are equal osteotomy and gap balance method. [0003] Isometric osteotomy is more popular in China. It mainly locates through bony anatomical landmarks (line connecting the posterior femoral condyle, line through the condyle, Whiteside line, etc.), and guides femoral rotation positioning and anterior and posterior condyle ...

AI Technical Summary

Problems solved by technology

However, in clinical practice, some patients have posterior condyle dysplasia, severe posterior condyle osteophytes, severe posterior condyle wear, and intra-articular deformities, so the anatomical landmarks of the femur are sometimes difficult to locate accurately

Therefore, it is debatable to simply use the line of the posterior femoral condyle as a reference for positioning or uniformly set the external rotation of the femur at 3 degrees.

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