IR@PKUHSC  > 北京大学第二临床医学院
学科主题临床医学
A Biomechanical Comparison of Two Intramedullary Implants for Subtrochanteric Fracture in Two Healing Stages: A Finite Element Analysis
Wu, Xinlei1; Yang, Ming2; Wu, Lijun1; Niu, Wenxin3
刊名APPLIED BIONICS AND BIOMECHANICS
2015
DOI10.1155/2015/475261
收录类别SCI
文章类型Article
WOS标题词Science & Technology
类目[WOS]Engineering, Biomedical ; Robotics
研究领域[WOS]Engineering ; Robotics
关键词[WOS]FEMORAL NAIL ANTIROTATION ; GAMMA-NAIL ; HIP SCREW ; NONUNIONS ; FEMUR
英文摘要

Background. The biomechanical effect of two implants, namely, proximal femoral nail antirotation for Asia (PFNA-II) and Expert Asian FemoralNail (A2FN), for treating subtrochanteric fracture during healing stages, is still unclear. Methods. A3D finite element model of an intact femur was constructed and validated. The fractured and postoperative models were accordingly produced. The postoperative models were loaded with the peak joint forces during gait for the soft and hard callus stages. The effects of stress distribution on the implants, femoral head and callus, and the deformation of the proximal femur were examined. Results. Both implants showed similar biomechanical effect in two healing stages. As the healing duration increased, the von Mises stress of two implants and the tensile stress of the femoral head decreased, whereas the compressive stress of the femoral head increased. However, the PFNA-II operation resulted in higher stress on the implant, lower stress on the proximal femur, and lower compressive stress and higher tensile stress on the callus than A2FN operation. Conclusions. The A2FN implant may provide a biomechanically superior construct for subtrochanteric fracture healing. However, the upper screw of the A2FN implant may be more likely to be loose in the healing process.

语种英语
WOS记录号WOS:000350438000001
项目编号11302154
资助机构National Science Foundation of China
引用统计
被引频次:9[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.bjmu.edu.cn/handle/400002259/51778
专题北京大学第二临床医学院
作者单位1.Wenzhou Med Univ, Inst Digitized Med, Wenzhou 325035, Zhejiang, Peoples R China
2.Peking Univ, Peoples Hosp, Dept Orthopaed & Traumatol, Beijing 100044, Peoples R China
3.Tongji Univ, Yang Zhi Rehabil Hosp, Sch Med, Lab Sports Biomech, Shanghai 2001619, Peoples R China
推荐引用方式
GB/T 7714
Wu, Xinlei,Yang, Ming,Wu, Lijun,et al. A Biomechanical Comparison of Two Intramedullary Implants for Subtrochanteric Fracture in Two Healing Stages: A Finite Element Analysis[J]. APPLIED BIONICS AND BIOMECHANICS,2015.
APA Wu, Xinlei,Yang, Ming,Wu, Lijun,&Niu, Wenxin.(2015).A Biomechanical Comparison of Two Intramedullary Implants for Subtrochanteric Fracture in Two Healing Stages: A Finite Element Analysis.APPLIED BIONICS AND BIOMECHANICS.
MLA Wu, Xinlei,et al."A Biomechanical Comparison of Two Intramedullary Implants for Subtrochanteric Fracture in Two Healing Stages: A Finite Element Analysis".APPLIED BIONICS AND BIOMECHANICS (2015).
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