LCP“动力化”一折端微动及应力的有限元分析

发布时间：2018-04-19 06:38

本文选题：胫骨 + 锁定加压接骨板　；参考：《中国矫形外科杂志》2017年08期

【摘要】：[目的]通过三维有限元分析骨折断端微动及应力情况,为LCP(locking compression plates,LCP)"动力化"临床相关应用提供理论依据。[方法]建立骨折近端锁定孔锁定螺钉,远端全锁定螺钉固定(A组);骨折近端锁定孔普通螺钉,远端全锁定螺钉固定(B组);骨折近端加压孔普通螺钉,远端全锁定螺钉(C组)固定胫骨中下段横形骨折的有限元模型,各组分别予以1/6、2/6、3/6、4/6、5/6及1倍体重应力值进行轴向压缩实验,评价各组骨折断端轴向微动距离、胫骨及内固定最大应力以及断端应力值等指标。[结果]相同轴向应力载荷下,胫骨最大应力:ABC,内固定最大应力:ABC;骨折端轴向微动位移:ABC,两两比较差异具有统计学意义(P0.05);骨折断端应力:ABC,两两比较差异具有统计学意义(P0.05)。[结论]B、C两组动力固定方式在体重应力范围内可为骨折断端提供有效的轴向微动;且较A组固定能明显减少内固定的应力,增加骨折断端应力。
[Abstract]:[objective] to provide a theoretical basis for the clinical application of LCP(locking compression plates LCPs by analyzing the fretting and stress at the fracture end by three dimensional finite element method.[methods] the proximal locking hole locking screw was established, the distal total locking screw was fixed in group A, the proximal locking hole common screw, the distal total locking screw fixed in group B, the proximal compression hole of fracture common screw, the proximal compression hole of fracture common screw,The finite element model of middle and lower tibial transverse fractures was fixed with distal total locking screw (group C). Each group was given 1 / 6 / 2 / 6 / 6 / 6 / 6 / 6 / 6 / 6 / 6 / 6 and 1 times body weight stress for axial compression test to evaluate the axial fretting distance of fracture end in each group.The maximum stress of tibia and internal fixation and the stress value of broken end.[results] under the same axial stress load, the tibial maximum stress: ABC, the internal fixation maximum stress: ABC, the axial fretting displacement at the fracture end: ABC, the difference was statistically significant (P 0.05), and the stress at the fracture end: ABC, the difference was statistically significant (P 0.05).[conclusion] the dynamic fixation in group B _ (C) can provide effective axial fretting for the broken end of fracture in the range of body weight stress, and can significantly reduce the stress of internal fixation and increase the stress of broken end of fracture compared with group A.
【作者单位】：中国人民解放军武汉总医院骨科;太原理工大学固体力学与生物力学研究所;
【基金】：湖北省自然科学基金项目(2014CFC1052) 湖北省卫生计生西医类一般项目(WJ2015MB119)
【分类号】：R687.3

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