Asano Taiyo, Akagi Masao, Nakamura Takashi
Department of Orthopedic Surgery, Kishiwada City Hospital, Osaka, Japan.
J Arthroplasty. 2005 Dec;20(8):1060-7. doi: 10.1016/j.arth.2004.08.005.
We investigated the concept that the knee has a fixed flexion-extension axis in the posterior femoral condyles and that this functional axis corresponds to the surgical epicondylar axis in vivo. We used a biplanar image-matching technique to perform the in vivo analysis of 9 normal knees to determine the location of the functional flexion-extension axis of the knee using an optimization technique. The functional flexion-extension axis passed through the sulcus of the medial epicondyle and the prominence of the lateral epicondyle. Flexion and extension of the knee could be represented as a rotation around a fixed axis, and this functional axis corresponded to the surgical epicondylar axis during a 0 degrees to 90 degrees flexion. This study assists more understanding of knee kinematics and provides useful information for the design and positioning of the prostheses used in total knee arthroplasty.
我们研究了这样一种概念，即膝关节在股骨后髁有一个固定的屈伸轴，且该功能轴在体内与手术上髁轴相对应。我们采用双平面图像匹配技术，对9个正常膝关节进行体内分析，运用优化技术来确定膝关节功能屈伸轴的位置。功能屈伸轴穿过内侧上髁沟和外侧上髁突出部。膝关节的屈伸可表示为围绕固定轴的旋转，并且在0度至90度屈曲过程中，该功能轴与手术上髁轴相对应。本研究有助于更深入地理解膝关节运动学，并为全膝关节置换术中使用的假体设计和定位提供有用信息。
