结果对研究对象膝关节屈曲运动中股二头肌短头力臂及长度进行计算和分析。

Results the length and the moment arm of the biceps femoris (short head) during knee flexion are calculated and analyzed.

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结论THA术中重建股骨偏心距可以增加髋外展肌的力臂，改善髋外展肌的力量，增强髋关节的稳定性。

Conclusion: it is very important to restore femoral offset in THA. This can increase the abductor lever arm and improve hip abductor strength to get soft tissue balancing and hip stability.

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