山东医药2016，Vol.56Issue(33)：14-17,21,5.DOI:10.3969/j.issn.1002-266X.2016.33.005
PFNA-Ⅱ治疗不稳定型股骨转子间骨折的动态有限元研究
Dynamic finite element analysis of unstable intertrochanteric fractures fixed with PFNA-Ⅱ
摘要
Abstract
Objective To explore the dynamic biomechanical properties of unstable intertrochanteric fracture fixed with proximal femoral nail antirotation Ⅱ(PFNA-Ⅱ)through finite element analysis,and therefore to provide theoretical foundation for clinic application.Methods Finite element model of Evans IV intertrochanteric fracture fixed by PFNA-Ⅱwas developed.We simulated the conditions of fracture union and internal fixation removal by adjusting the contact relation-ship of fractures and taking out of PFNA-Ⅱ.Stress peak and biomechanical stability of models were compared with normal femur model through finite element analysis.Results The highest stress concentration area of fixation models was located in the caudal passage of the blade through the nail.After fracture union,the stress of internal fixation increased.After in-ternal fixation was removed,the stress of femoral neck increased significantly and the stability decreased.Conclusions In order to avoid internal fixation rupture after fracture union,PFNA-Ⅱ should be removed,meanwhile the risk of femoral neck fracture requires attention.关键词
股骨转子间骨折/内固定/股骨近端防旋髓内钉/有限元分析Key words
intertrochanteric fractures/internal fixation/proximal femoral nail antirotation Ⅱ/finite element analysis分类
医药卫生引用本文复制引用
姜自伟,虎群盛,黄枫,郑晓辉,赵京涛,周琦石..PFNA-Ⅱ治疗不稳定型股骨转子间骨折的动态有限元研究[J].山东医药,2016,56(33):14-17,21,5.基金项目
广东省自然科学基金项目（2014A030310379）；广州市科技计划项目（1563000664）。 （）
