中国组织工程研究2016，Vol.20Issue(48)：7219-7224,6.DOI:10.3969/j.issn.2095-4344.2016.48.011
三角股骨近端髓内钉固定不稳定型股骨转子间骨折的有限元分析
Finite element analysis of unstable intertrochanteric fracture fixed with triangle proximal femoral nail
摘要
Abstract
BACKGROUND:Proximal femoral nail antirotation (PFNA) and Asian PFNA (PFNA-II) are the most common internal fixation methods in the treatment of intertrochanteric fractures. But stress concentration and failure of internal fixation are stil inevitable. <br> OBJECTIVE:To analyze the biomechanical behaviors of the unstable intertrochanteric fracture fixed with the new designed triangle proximal femoral nail and to testify its feasibility by compared with PFNA-II. <br> METHODS:Three-dimensional finite element model of proximal femur was established by using CT data of femur. Then the Evans IV femoral intertrochanteric fracture was established, fol owed by fixed with triangle proximal femoral nail and PFNA-II, respectively. The stress distribution and biomechanical stability under the same load were compared between two nails. <br> RESULTS AND CONCLUSION:(1) The stress concentration of the two nails was both located at the junction of the screw blade and the main nail. (2) The maximum stress of PFNA-II and proximal femoral nail was 214 and 196.2 MPa, respectively. The displacement of PFNA-II model was significantly larger than that of the triangular proximal femoral nail (5.37 mm versus 5.18 mm). (3) To conclude, for Evans IV intertrochanteric fracture, the triangle proximal femoral nail is superiority to PFNA-II, showing the good fixation stability and low incidence of internal fixation failure, which al meet the treatment standards.关键词
骨科植入物/数字化骨科/股骨转子间骨折/亚洲型股骨近端防旋髓内钉/有限元分析/生物力学/广东省自然科学基金分类
医药卫生引用本文复制引用
虎群盛,姜自伟,黄枫..三角股骨近端髓内钉固定不稳定型股骨转子间骨折的有限元分析[J].中国组织工程研究,2016,20(48):7219-7224,6.基金项目
广东省自然科学基金项目(2014A030310379)；广州市科技计划一般项目(201510010005)；国家中医药管理局2013年全国名老中医药专家传承工作室建设项目-陈基长全国名老中医药专家传承工作室 （2014A030310379）
