以下为句子列表：
英文: The summation of forces on extensor mechanism should be zero according to equilibrium rules of forces before and after total knee arthroplasty based on constant extensor moment.
中文: 计算得到髌骨形位参数变化前后与伸膝机构相关的动力学参数，包括股四头肌力、髌韧带力及髌股关节接触压力的变化。
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英文: One stage reimplantation for the salvage of total knee arthroplasty complicated by infection
中文: 人工全膝关节置换术后深部感染的一期假体再置换
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