摘要
[目的]探讨腰椎峡部裂翼状记忆合金节段内固定器(WMAIF)内部生物力学特征,指导临床合理使用WMAIF。[方法]采用大型有限元分析软件ANSYS 8.0建立WMAIF三维模型,对模型进行网格划分,然后进行相应的力学加载运算。[结果]建立了WMAIF的有限元模型,可以预测WMAIF在变形过程中其本身结构中各节点、单元的受力、位移情况。[结论]WMAIF抗拉能力强,固定牢固,是治疗腰椎峡部裂较好的新型节段内固定器械。
[Objective] To analyze the mechanism of shape memory alloy imrasegmental fixator for lumbar spondylolysis （WMAIF） with finite element method. [Method] The three-dimensional model of WMAIF was established by using ANSYS 8. 0 software for large finite element analysis. The model was extended with restriction in different parts, and to undertake corresponding mechanics calculation. [Result] The finite element model of WMAIF was set up, which could predict the strength and displacement of every node and element of its own structure in the course of deforming. [ Conclusion] WMAIF is strong enough against tensile stress, which is a new and reliable intrasegmental instrument for direct repairing of lumbar spondylolysis.
出处
《中国矫形外科杂志》
CAS
CSCD
北大核心
2006年第19期1485-1486,i0003,共3页
Orthopedic Journal of China
基金
广东省科技计划项目(No.20042070019)
南方医科大学院长特色基金项目(No.2003医-M24)
关键词
腰椎峡部裂
内固定器
有限元分析
生物力学
lumbar spondylolysis
internal fixator
element method analysis
binmechanism
