简介:摘要目的探讨前臂旋前旋后运动的肌力变化以及肱骨应力、位移的生物力学特性。方法根据Dicom数据在MIMICS中重建三维肱骨并在Hypermesh中划分网格和材料赋值。采用志愿者的身高、体重数据在AnyBody骨骼肌肉系统中建立个性化上肢的骨骼肌肉模型,模拟前臂旋前旋后运动,导出旋前旋后运动过程中的肌力等边界条件,将此数据作为肱骨有限元分析的边界条件。最后在Abauqus中行肱骨应力、位移大小的分析。结果前臂0°~90°旋前运动时主要是旋前圆肌、旋前方肌发挥作用,旋前圆肌约90°时肌肉力最大,旋前方肌约40°时肌肉力最大。当前臂0°~90°旋后运动时主要是旋后肌、肱二头肌发挥作用,二者肌肉力在旋后约90°时最大。旋前运动约90°时肱骨受到的应力、位移最大,而旋后运动约10°时肱骨受到的应力、位移最大。应力大致在肱骨中下1/3处集中,而位移集中在肱骨的中部及远端,且以肱骨远端最为明显。结论利用AnyBody骨骼肌肉系统成功模拟了前臂旋前旋后运动并与有限元分析联动,在肌力加载下分析肱骨应力、位移。肱骨中下段是骨折的好发部位。
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