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首页> 外文期刊>Journal of Biomechanics >The difference in trochlear orientation between the natural knee and current prosthetic knee designs; towards a truly physiological prosthetic groove orientation.
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The difference in trochlear orientation between the natural knee and current prosthetic knee designs; towards a truly physiological prosthetic groove orientation.

机译：自然膝关节和目前的假肢膝关节设计在滑车方向上的差异;走向真正的生理性义齿沟取向。

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The patella groove of total knee replacements has evolved from a groove with a neutral orientation to a groove with a lateral (also referred to as valgus) orientation. In this study the authors questioned whether femoral components with a lateral groove orientation more closely approximate the configuration in the natural knee. The groove orientations of an implanted CKS femoral component, available in different sizes and with different groove orientations, were determined and compared with formerly published measurements of the natural trochlear orientation. It was found that the prosthetic groove orientations differed considerably from human anatomy, up to a maximum deviation of 6.4 degrees . The orientations of the prosthetic grooves were all equal within the area of the natural trochlea. The area of the natural trochlea guides the patella between about 30 degrees and 120 degrees of knee flexion. The orientations of the prosthetic grooves were different in the area of the supracondylar pouch/proximal anterior flange. This area guides the patella between about 0 degrees and 30 degrees of knee flexion. As this study showed a considerable deviation between natural and prosthetic groove orientation, an optimal prosthetic groove orientation, matching the average orientation in the natural knee, was mathematically determined.
机译：全膝关节置换的骨沟已从具有中性取向的沟演变成具有侧向（也称为外翻）取向的沟。在这项研究中，作者质疑具有横向凹槽方向的股骨组件是否更接近自然膝关节的构型。确定了可植入的CKS股骨组件的凹槽方向，可以提供不同的尺寸和不同的凹槽方向，并将其与以前发表的自然滑车方向的测量结果进行比较。已经发现，假体凹槽的取向与人体解剖学有很大不同，最大偏差为6.4度。在自然滑车区域内，义齿沟的方向都相等。天然滑车的区域在the屈的大约30度到120度之间引导the骨。 con上囊/近前突缘区域的修复槽方向不同。该区域在the屈的0度到30度之间引导guide骨。由于这项研究表明自然牙槽沟和假牙槽沟方向之间存在相当大的偏差，因此，可以通过数学方法确定与自然膝盖的平均方向相匹配的最佳人工牙槽沟方向。

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