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不同步态位相跟、距骨应力分布的三维有限元分析
引用本文:刘立峰,蔡锦方.不同步态位相跟、距骨应力分布的三维有限元分析[J].第二军医大学学报,2003,24(9):1006-1009,1012.
作者姓名:刘立峰  蔡锦方
作者单位:济南军区总医院骨创科,济南,250031
基金项目:全军医药科研“九五”规划课题 ( 96D0 2 0 )
摘    要:目的:建立跟、距骨骨性结构的三维有限元模型,对其在不同步态过程中的应力分布进行分析.方法:应用CT扫描技术和计算机图像处理系统,建立跟、距骨的三维有限元模型.利用跟、距骨有限元模型模拟跟、距骨在步态过程中3个位相(落地相、中立相、起步相)时的受力状况,并进行有限元计算.结果:建立了跟、距骨骨性结构的三维有限元精细模型,同时获得了跟、距骨在3个位相时的应力分布和应力增高区.跟、距骨在不同位相的应力分布明显不同,从落地相到起步相应力逐渐增高.结论:本研究建立的三维有限元模型可用于跟、距骨的生物力学研究.跟、距骨的应力增高区对临床研究有重要意义,可提示导致跟、距骨骨折及骨性关节炎的好发因素.

关 键 词:三维有限元模型、跟骨、距骨、生物力学
文章编号:0258-879X(2003)09-1006-04

Three-dimensional finite element model of calcaneus and talus during different gait phases
LIU Li Feng,CAI Jin Fang.Three-dimensional finite element model of calcaneus and talus during different gait phases[J].Academic Journal of Second Military Medical University,2003,24(9):1006-1009,1012.
Authors:LIU Li Feng  CAI Jin Fang
Institution:LIU Li Feng,CAI Jin Fang *
Abstract:Objective:To establish a 3 dimensional finite element model of calcaneus and talus for analysing their stress distribution during different gait phases. Methods: CT scanning and computer image processing system were used to establish the model to simulate the situation of calcaneus and talus for 3 phases (heel strike, midstance, push off) during the gait. A finite element solver was used to calculate stress. Results: A three dimensional finite element model of calcaneus and talus was established. And the stress distribution within the bone was obtained and regions with elevated stress at 3 phases were located. The stress distributions of 3 phases were significantly different. The stress increased gradually from heel strike to push off. Conclusion:The model can be used to study biomechanics of calcaneus and talus. The regions of elevated stress of calcaneus and talus are important, which provide an insight into the factors contributing to the fractures and arthritis.
Keywords:three  dimensional finite element model  calcaneus  talus  biomechanics
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