中国组织工程研究2017，Vol.21Issue(23)：3700-3705,6.DOI:10.3969/j.issn.2095-4344.2017.23.016
带锁髓内钉中棒槌形高螺纹锁钉与通用锁钉抗弯强度及应力分布的比较
Bending strength and stress distribution of the interlocking intramedullary nails with high-thread wooden club-shaped nails versus traditional nails
摘要
Abstract
BACKGROUND:Interlocking intramedullary nailing is a main method for bone fractures,but traditional static intramedullary nails usually lead to nail breakage and loosening.Thereafter,we design a novel high-thread wooden club-shaped screw (HTWCSS) and explore its mechanical properties.OBJECTIVE:To measure the bend strengths of HTWCSS,analyze its stress distribution,and to evaluate its biomechanical properties,thereby providing theoretical basis for its clinical application.METHODS:The bend strength of HTWCSS and traditional nails were measured via three-point bending experiments.Transverse fractures of the middle tibia were simulated using finite element method,and then the force and stress distribution of the two different nails were analyzed.RESULTS AND CONCLUSION:(1) The average maximum load of HTWCSS was 3.52 kN and 1.81 kN at span of 20 mm and 30 mm,respectively,which were larger than those of the traditional nails.(2) The average maximum displacement and the stress of HTWCSS were smaller than those of the traditional screws in finite element analysis,and the stress distribution was relatively dispersed.(3) The average maximum axial displacement and stress HTWCSS,traditional interlocking screws,wooden club-shaped screws and traditional screws were 131 MPa and 3.27 mm,162 MPa and 4.07 mm,26.5 MPa and 0.323 mm,and 34.3 MPa and 0.407 mm,respectively.(4) These results suggest that HTWCSS has relative high bend strength,and it is able to disperse stress and improve fatigue strength bend strength,further reduce screw broken.关键词
骨科植入物/数字化骨科/带锁髓内钉/锁钉/有限元分析/力学分类
医药卫生引用本文复制引用
夏关平,王永清,董黎敏,刘磊,董衍生,王业林..带锁髓内钉中棒槌形高螺纹锁钉与通用锁钉抗弯强度及应力分布的比较[J].中国组织工程研究,2017,21(23):3700-3705,6.基金项目
天津市卫生局科研项目(09ky08) the Research Project of Tianjin Health Bureau,No.09ky08 （09ky08）
