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学科主题: 临床医学
题名:
A Biomechanical Comparison of Two Intramedullary Implants for Subtrochanteric Fracture in Two Healing Stages: A Finite Element Analysis
作者: Wu, Xinlei1; Yang, Ming2; Wu, Lijun1; Niu, Wenxin3
刊名: APPLIED BIONICS AND BIOMECHANICS
发表日期: 2015
DOI: 10.1155/2015/475261
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
所属项目编号: 11302154
项目资助者: National Science Foundation of China
WOS记录号: WOS:000350438000001
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.bjmu.edu.cn/handle/400002259/51778
Appears in Collections:北京大学第二临床医学院_期刊论文

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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

Recommended Citation:
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.
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