原位微波消融与人工假体置换治疗股骨远端恶性肿瘤的三维有限元分析  

Three-dimensional Finite Element Analysis of Treatment of Malignant Tumor on the Distal Femur with In-situ Microwave Ablation and Artificial Prosthesis Replacement

作　　者：马立敏[1] 张余[1] 周烨[1] 杨小明[1] 蓝国波[1] 姚子龙[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》2013年第12期42-44,共3页China Digital Medicine

基　　金：国家自然科学基金面上项目(编号:81271957);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)~~

摘　　要：目的:探讨股骨远端肿瘤型骨缺损,假体与残骨不同比例的生物力学研究。方法:1例股骨远端患者,术前行64排双源螺旋CT扫描,进行三维重建,建立股骨远端40%、50%、60%骨缺损的复合假体三维有限元模型,分析股骨及假体模型应力分布。结果:肿瘤假体置换40%骨缺损应力分布比较均匀,应力主要集中在假体柄中下段,40%、50%截骨与60%截骨有统计学差异(P<0.05)。40%骨缺损与50%骨缺损没有统计学差异(P>0.05)。结论:股骨截骨长度与假体柄长度之比接近1时较为适宜,出现假体松动、断裂的可能性较小。Objective： This study was to investigate the biomechanical factors of proxi-mal femur in different proportion prosthetic. Methods： A patients with bone tumor by spiral CT scanner. Three-dimensional finite element bone defect models were established 40%,50%,60% based on CT images using simpleware 5.0 software. The stress distribution in the femur model and prosthetic was analyzed. Results： The stress distribution is more homogeneous in the 40%,50%, bone defect models,we found that high stress distributed by spiral-shaped in the tip of prosthesis . the distribution of the bone defect models there are significant differences 40%,50% and 60%（P〈0.05）,there are no significant differences 40%and 50%. Conclusion： Fenmr osteotomy and prosthesis stem length ratio of 1：1 more appropriate to help can decrease prosthesis dislocation and fracture.

关 键 词：股骨缺损 肿瘤假体 有限元分析 

分 类 号：R683.42[医药卫生—骨科学]