胸腰椎内固定和椎体增强技术对邻近节段影响的生物力学分析Biomechanical study of the adjacent segment of thoracolumbar spine with internal fixation or vertebral body enhancement
王静成;王骅;杨建东;蒋百川;陶玉平;王强;
摘要(Abstract)：
[目的]探讨采用内固定或椎体增强技术后邻近节段生物力学特性的变化。[方法]12具尸体胸腰椎标本,分为正常对照组、椎体压缩骨折后经椎弓根自体骨植骨组、椎体成形术组、RF内固定组分别进行实验应力分析。应力加载方式为轴向压缩、前屈、后伸、侧屈等4种,通过各种工况的生物力学测试,说明采用内固定或椎体增强技术后邻近节段力学特性的变化。[结果]采用椎体内植骨或骨水泥填充的方法,有使邻近节段的刚度降低,应力强度提高的轻微趋势,但无显著性差异(P>0.05)。而采用内固定后,邻近节段刚度明显降低,应力强度明显提高,呈显著性差异(P<0.05)。[结论]采用椎体内植骨或骨水泥填充的方法对邻近节段的影响较小,而采用内固定后对邻近节段产生了不利的生物力学影响。
关键词(KeyWords)： 内固定;椎体增强技术;邻近节段;生物力学
基金项目(Foundation): 江苏省社会发展指导性计划(No.BS2005635)
作者(Author): 王静成;王骅;杨建东;蒋百川;陶玉平;王强;
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