Rotational alignment of the trochlear component parallel to the epicondylar axis optimizes patellar tracking.25,26 Palpation of the epicondyles is difficult, particularly when using smaller incisions.

• 与上踝轴平行的滑车成分旋转位移能使髌骨痕迹最优化25.；26。上踝触诊很难，特此是使用小切口时。