四角融合器改良前、后有限元分析对比研究  

Unimproved versus newly-improved four-corner arthrodesis concentrator:a finite element analysis

作　　者：齐保闯[1] 唐辉[1] 范新宇[1] 张美超[2] 朱跃良[1] 李川[1] 徐永清[1] 

机构地区：[1]成都军区昆明总医院附属骨科医院,昆明650032 [2]南方医科大学广东省医用生物力学重点实验室,广州510515

出　　处：《中国临床解剖学杂志》2012年第4期447-451,共5页Chinese Journal of Clinical Anatomy

基　　金：全军医药卫生科研基金资助项目(06MA140);军队临床高新技术重大项目(2010gxjs041)

摘　　要：目的运用有限元方法对镍钛记忆合金腕骨四角融合器(NTMA-FCAC)进行力学性能分析,为其临床应用提供生物力学理论依据。方法应用有限元方法(FEM)建立NTMA-FCAC的三维有限元模型,并根据腕关节掌屈背伸时NTMA-FCAC受力情况模拟加载,分析模型各部分的应力、应变值及分布和压缩刚度。结果在模拟NTMA-FCAC受力的情况下,应力集中在体臂交界处,其他部分应力分布较为均匀;NTMA-FCAC改良前、后的刚度值接近,在一定范围内均能满足术后腕关节功能锻炼。NTMA-FCAC的刚度较强,能满足四腕骨融合的力学要求。结论 NTMA-FCAC在体臂交界处应力较为集中容易产生疲劳,其厚度加强后能很好的应用于临床。Objective To evaluate biomechanical properties of NiTi ：shape memory alloy four-comer arthrodesis concentrator （NTMA-FCAC） by the method of finite element analysis and provide theoretical basis for it＇s clinical application. Mothods With the analysis function of Ansys8.0, the models of NTMA-FCAC were built. Under the same loading condition as the arthrodesis concentrator devices encountering in fatigue test, the models were stricted and loaded. Through structure analysis, the strain/stress distributions, compression and tension stiffness were processed. Results The result showed that, in addition to several stress-bearing areas located in the junctional zones between body and arms, the stress distribution of other parts are even. The stiffness of two models was similar. Within the scope of certain the NTMA-FCAC can satisfy wrist functional exercise postoperatively. Conclusions The result shows the newly-improved NTMA-FCAC have excellent biomechanical properties. It can meet clinical application.

关 键 词：有限元 应力 腕 腕塌陷 四角融合术 

分 类 号：R318.01[医药卫生—生物医学工程]