桡骨远端解剖型记忆聚合器治疗桡骨远端骨折三维有限元分析  

Three-dimensional finite element analysis of anatomic distal radius Nitinol memory connector treating distal radius fracture

作　　者：苏佳灿[1] 禹宝庆[1] 张春才[1] 许硕贵[1] 王家林[1] 纪方[1] 王保华[2] 薛召军[2] 吴建国[2] 丁祖泉[2] 

机构地区：[1]解放军第二军医大学长海医院骨科,上海市200433 [2]同济大学生命科学与生物工程学院,上海市200092

出　　处：《中国临床康复》2004年第5期873-875,共3页Chinese Journal of Clinical Rehabilitation

基　　金：解放军第二军医大学长海医院258资助项目(258-5)~~

摘　　要：目的:探讨桡骨远端解剖型记忆聚合器(anatomicdistalradiusNitinolmemoryconnector,DRMC)治疗桡骨远端骨折的记忆生物力学特性。方法:采用三维建模及有限元方法,分析计算DRMC固定桡骨远端骨折时在骨折断面及周围所产生的应力并构建记忆应力场。结果:桡骨远端DRMC持骨支产生轴向持骨力为14.66MPa,持骨支最大主应力值为40～70MPa,最小主应力值为3～7MPa,而加压支应力值相对较大,为20～40MPa。结论:DRMC在骨折线周围的应力分布合理,轴向持骨力有利于早期骨折稳定,加压支纵向加压及记忆效应的存在,可将被固定的废用段转化为生长段,促进骨折愈合。AIM:To explore the memory biomechanical characteristics of anatomic distal radius Nitinol memory connector(DRMC) treating distal radius fracture. METHODS:The memory stress in or around the fracture surface when distal radius fracture fixated with DRMC were calculated by means of establishing three dimensional model and finite element analysis. RESULTS:Axial holding stress developed by holding part of DRMC on distal radius was 14.66 4MPa,the maximum stress of holding part was 40-70 MPa,and the minimum stress was 3-7 MPa,while the stress of compression part was 20-40 MPa. CONCLUSION:The distribution of stress which DRMC developed around the fracture line is reasonable,axial holding stress is of benefit to stabilizing fracture during earlier period,and with the existence of longitudal compression and memory effect,fixated disused section can be transferred into developed section to enhance fracture healing.

关 键 词：桡骨远端解剖型记忆聚合器 治疗 桡骨远端骨折 生物力学 三维建模 三维有限元分析 

分 类 号：R683.41[医药卫生—骨科学]