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改善脑瘫患儿行走功能的一个重要问题是重建膝关节的屈伸功能。强直膝或蹲位步态常常造成走路疲劳，严重影响患儿行走匹离和生活质量。传统的软组织松解术以胞绳肌腱松解延长来校正伸膝功能，容易造成膝关节过伸和步态跨步早期的屈膝障碍，而膝关节的动态活动范围并未得到改善[
An important issue to improve the walking function of children with cerebral palsy is to reconstruct flexion and extension function of the knee joint. Ankylosing knees or squat gait often lead to walking fatigue, seriously affecting children’s walking distance and quality of life. The traditional soft tissue loosening lengthening of suture tendons to correct extensor function, easily lead to knee hyperextension and gait stride early knee flexion disorder, and knee range of dynamic activity has not been improved [