孙文涛++++++李鹏飞++++++林梓凌++++++何祥鑫++++++李红庚++++++鲁荣贵++++++冯莲影

    [摘要] 目的 基于断裂力学模拟股骨成形术前后股骨颈的断裂过程，分析骨水泥干预对老年骨质疏松性髋部骨折的疗效。 方法 选取1例骨质疏松股骨颈骨折的健侧髋部CT资料以Dicom格式保存，导入Mimics三维建模软件重建髋部骨骼有限元模型，将模型导入工程力学软件HYPERMESH划分网格、定义材料属性、设置边界条件，生成的为对照模型；在边界条件不变的情况下，对股骨颈区域内部的有限元网格重新定义材料属性，生成的为实验模型；分别将两个模型导入动力求解软件LS-DYNA中进行运算，比较动态断裂过程以及Von Mises云图。 结果 对照模型股骨颈断裂，骨折线由内下向外上方走行，Von Mises云图上显示股骨颈骨折部位应力较高；实验模型股骨颈部位未见明显骨折线，Von Mises云图上显示髋部骨骼周围应力较对照组明显降低。 结论 从生物力学角度上，股骨成形术对于预防骨质疏松性股骨颈骨折具有可行性、实用性，为临床运用提供参考依据。

    [关键词] 股骨成形术；骨水泥；预防；骨质疏松；髋部骨折；断裂分析

    [中图分类号] R683 [文献标识码] A [文章编号] 1673-7210(2017)07(c)-0094-03

    [Abstract] Objective To analyze effect of bone cement intervention on osteoporotic hip fracture in elderly patients based on biomechanical simulation of femoral neck fracture before and after femoroplasty. Methods CT image data of one case of femoral neck fracture was collected. Mimics software was used to rebuild the three-dimensional finite element model of femoral. Model was imported in HYPERMESH software for meshing， defining material properties， setting the boundary conditions， loading the force curve and the role of points such as pre-processing ......