股骨远端骨肿瘤不同缺损范围的有限元分析  

Application of Finite Element Analysis Different Proportion Bone Tumor Defect in Distal Femur

作　　者：马立敏[1] 周烨[1] 周霞[1] 夏虹[1] 黄文汉[1] 姚孟宇 张余[1] 

机构地区：[1]广州军区广州总医院骨科医院骨病关节科

出　　处：《中国数字医学》2014年第8期77-79,共3页China Digital Medicine

基　　金：国家自然科学基金面上项目(编号:81271957;81272057);全军医学科研"十二五"重点项目(编号:bws11c065);全军医学科研"十二五"面上课题(编号:CWS11C268);广东省矫形技术与植入材料重点实验室建设基金(编号:[2011]233-32);全军热区创伤救治与组织修复重点实验室~~

摘　　要：目的:探讨股骨远端肿瘤型骨缺损,不同比例骨缺损的生物力学研究。方法:1例股骨远端患者,术前行64排螺旋CT扫描,建立股骨缺损5cm、10cm、15cm骨缺损的复合假体三维有限元模型,最后利用有限元分析软件ABAQUS6.9对该模型进行生物力学分析。结果:三组模型应力均未达到屈服应力,5cm骨缺损模型最大应力为2.1Mpa,最大位移为0.04mm。10cm骨缺损模型最大应力为5.8Mpa,最大位移为0.14mm。15cm骨缺损模型最大应力为11.07Mpa,最大位移为0.19mm。但其峰值均低于骨水泥疲劳强度。结论:骨水泥+锁定钢板治疗股骨远端骨肿瘤不会引起股骨应力分布的明显改变。随着缺损范围的增大,引起填充骨水泥的位移增大,不利于骨折愈合。Objective：This study was to investigate the biomechanical factors of proxi-mal femur in different proportion femur defect. Methods： A volunteers left image data was obtained by spiral CT tomography. Then, Three-dimensional finite element bone defect models were established 5cm,10cm,15cm,based on CT images using simpleware 5.0 software. we established the three dimensional finite element model of these materials with software ABAOUS 6.9 software and carried out finite element analysis to the mode1 in biomechanics. Results： Stresses of all models do not exceed yield strength. 5cm bone defect the maximum principal stress is 2.1Mpa, The maximum displacement is 0.04mm, 10cm bone defect the maximum principal stress is 5.8Mpa, The maximum displacement is 0.14 mm, 15 cm bone defect the maximum principal stress is 11.07Mpa, The maximum displacement is 0.19mm. which not exceeds the fatigue strength of bone cement. Conclusion： The stress distribution of the femur didn＇ t change significantly after treating dismal femur patients with cemented and locking plate, with bone defect extensive of increase displacement, and against fracture healing.

关 键 词：骨肿瘤 股骨远端 有限元分析 

分 类 号：R318.1[医药卫生—生物医学工程]