Comprehensive biomechanical analysis of microcosmic trabecular structure of cancellous bone
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摘要: 股骨松质骨具有骨小梁的微观结构特性,影响了股骨的整体力学性能,找到适当的单元形状与骨小梁分布特点可以有效地进行股骨生物力学特性分析．采用不同结构的微观骨小梁单元模型分析各单元的生物力学特性,并采用快速成形样件力学实验和有限元分析相结合的方法,对由不同骨小梁单元及不同分布形式构成的股骨模型进行生物力学分析,找到了较好的微观骨小梁单元模型及总体布局形式,获得了快速成形样件实验分析与有限元分析2种结果的综合分析,并应用于股骨松质骨建模．所获得的微观单元优化结构可以有效地应用于仿生结构材料的制造．Abstract: Femoral cancellous bone has microcosmic trabecular structure and its element characteristics effect the gross mechanical property of the femur. Finding proper cell configuration and its distribution will be of great importance for more effective biomechanical analysis of cancellous bone. A lot of microcosmic trabecular models with different structures were used to study the biomechanical performance of the elements. The biomechanical analysis of the femur model with different trabecular structures and distributions were carried out with the combination of the finite element method and the mechanics experiment of sample part fabricated by rapid prototyping processes. The relation between the trabecular structure and its biomechanical characteristics was obtained. Also, the comparison between the finite element results and the mechanics experiment was worked out. Based on analysis, better microcosmic trabecular structure and its distribution were found and utilized in building an analytic model of the femoral cancellous bone. The optimized microcosmic element structure can be applied to the manufacture of the biological materials effectively.
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Key words:
- biomechanics /
- rapid prototyping /
- finite element method /
- cancellous bone /
- trabecular
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