Unimproved versus newly-improved four-corner arthrodesis concentrator: a finite element analysis
JI Bao-Chen, TANG Hui, FAN Xin-Yu, ZHANG Mei-Chao, SHU Ti-Liang, LI Chuan, XU Yong-Qing
Chinese Journal of Clinical Anatomy ›› 2012, Vol. 30 ›› Issue (4) : 447-451.
Unimproved versus newly-improved four-corner arthrodesis concentrator: a finite element analysis
Objective To evaluate biomechanical properties of NiTi shape memory alloy four-corner arthrodesis concentrator (NTMA-FCAC) by the method of finite element analysis and provide theoretical basis for it's clinical application. Methods 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.
Finite element / Stress / Wrist / Carpal collapse / Four-corner arthrodesis
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