胫骨远端骨折解剖锁定钢板固定的有限元分析  

Finite element analysis of posterior anatomicallocking plate for distal tibia

作　　者：王海燕 许贵存[2] 蔡永强 李志军 张少杰 高尚 王星 李筱贺 

机构地区：[1]内蒙古医科大学基础医学院人体解剖教研室,内蒙古自治区呼和浩特市010110 [2]内蒙古医科大学附属医院急诊外科,内蒙古自治区呼和浩特市010110

出　　处：《中国组织工程研究》2017年第35期5697-5702,共6页Chinese Journal of Tissue Engineering Research

基　　金：2016年度内蒙古自治区留学人员科技活动项目（2016）;内蒙古科技计划项目（2016）

摘　　要：背景：胫骨后方解剖钢板对于胫骨远端复杂骨折具有较好的固定效果,但固定后也存在断钉断板的情况,其具体规律如何尚未有相关研究.目的：建立胫骨远端锁定钢板固定有限元模型并进行有限元分析,为其设计改造提供参考.方法：将34岁68kg男性患者左侧胫骨远端影像学数据导入Mimics16.01软件,利用软件的自动识别和修改功能修饰后进行三维重建,将三维模型导入Ansys11.0软件,再利用solidwork2014参照解剖测量数据建立锁定钢板及螺钉模型并导入Ansys11.0软件进行配准,并进行面网格和体网格划分,再在胫骨上端垂直加载340N的力,分析钢板和螺钉的应力分布.结果与结论：锁定钢板钉孔与螺钉之间连接紧密,钢板的应变大小取决于应力的大小,胫骨后路远端锁定钢板能有效的分解骨折断端应力,应力分布较为均匀,各种运动状态下应力集中部分应力均小于钢板的屈服强度.说明胫骨远端锁定解剖固定钢板应力分布均匀,固定稳定,不易出现断裂.BACKGROUND： The posterior anatomical locking plate has obtained excellent fixing performance in thetreatment of complex fractures of the distal tibia; however, there are many drawbacks such as nail and platebroken, and the related rules are never reported.OBJECTIVE： To establish a finite element model of posterior anatomical locking plate for distal tibia and toprovide references for its design and improvement.METHODS： The imaging data of a male patient aged 34 years old （body mass： 68 kg） with fracture on the leftdistal tibia were imported into Mimics16.01 software, and the proposed reconstruction parts were determinedbased on the default threshold of the software. The files were imported into the Ansys11.0 software, the distaltibial surface was fixed, and a force of 340 N was vertically loaded on the supine surface of the horizontalsection of the large tibial shaft.RESULTS AND CONCLUSION： There was completely connected with the stepped surface of nut and screwthread portion in locking steel plate. The strain on the plate depended on the stress values. The posterioranatomical locking plate for distal tibia was more favorable for the fixation at the fracture site and could reducethe fixed plate and screws loosening, both of which could affect the fixed efficacy.

关 键 词：骨科植入物 骨植入物 胫骨远端 锁定钢板 螺钉 有限元分析 应力分布 疲劳断裂 生物力学分析 

分 类 号：R318[医药卫生—生物医学工程]