屈膝过程中的胫股运动特性分析

The Study uf Tibial - Femoral Joint Motion Characteristics during Knee Flexion

本文采用三维位移测量方法，测试１０例离体人膝标本的胫股关节三维运动特性。发现屈膝过程中，胫股运动也具有典型的三维运动特点。其中在屈膝初期的３０°内，胫骨内旋最明显并伴有胫骨内翻现象，平均内旋８°，内翻６－７ｍｍ，膝关节完全伸直时胫股扣锁使膝关节稳定，屈曲时胫股“解锁”使膝关节松弛，具重要的临床意义，同时提示，在解释传统的胫股扣锁现象时不应遗漏伴随发生的胫骨内／外翻现象。

In order to study the mution characteristics of tibial - femoral joint during knee flexion , ten of fresh human cadav- er knee specimens were measured with the method of 3 - dimensional precise mechanical measurement . The result showed that the tibial - femoral joint has a typical 3 - dimensional motion patterns duting knee motion , of which the internal rotation of tibial (average 8°)is the most obviously accompanying with the tibial varus (average 6-7mm ) within the first 30°of knee flexion The screw home mechanisms of tibial -femoral joint with stabilized the knee joint while knee flexion . which is important in clinic practice . At the same, time , it is necessary to illustrate the tibial varus phenomenon when explaining the traditional concept of screw home mechanism..