实验性胫骨延长对膝关节功能变化的影响Effect of Limb Lengthening on Motor Function of Knee
王序全,李起鸿,许建中,杨柳,马树枝,周强
摘要(Abstract)：
目的:探讨肢体缓慢牵伸延长过程中关节功能变化规律。方法:30只健康成年新西兰兔随机分为延长组(A组)及停止延长3个月组(B组),各组按延长幅度不同又分为延长10％、20％及40％3个亚组。采用胫骨上干骺端1mm/d速度缓慢牵伸延长术。X线确定延长幅度及膝关节影像学变化:确定延长终止及取材时膝关节屈伸范围。结果:(1)各组不同时相点膝关节软骨未见明显影像学异常;(2)A组中延长20％时出现显著性膝关节屈伸功能障碍(P<0.05),延长40％时仅为正常的44.7％左右(P<0.01);B组关节功能均有显著性改善,其中延长20％组已恢复至延长前水平,而延长40％组也较延长终止明显改善,但仍低于延长前正常水平,为正常水平的88.5％左右(P<0.05)。结论:肢体延长过程中可能出现暂时性关节功能障碍,并主要发生在大幅度延长时。虽在延长停止后可逐渐恢复,但仍需积极防治。
关键词(KeyWords)： 肢体延长;关节;活动
基金项目(Foundation):
作者(Author): 王序全,李起鸿,许建中,杨柳,马树枝,周强
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