髋臼周围肿瘤切除后功能重建手术的仿真建模方法  

Study on simulation modeling method of the reconstruction following resection of peri-acetabular tumors

作　　者：陈博[1] 丁祖泉[1] 游木荣[2] 俞光荣[2] 

机构地区：[1]同济大学生命科学与技术学院,上海200092 [2]同济大学附属同济医院骨科,上海200065

出　　处：《医用生物力学》2008年第1期37-42,共6页Journal of Medical Biomechanics

摘　　要：目的研究一套髋臼周围肿瘤切除后重建骨盆环及其内固定系统的精确、快捷的有限元建模方法。方法首先将第三腰椎至股骨中段及内固定系统行CT扫描后导入医学有限元建模软件Simpleware中处理,用可视化装配法生成含内固定系统的骨盆环STL模型,然后经Geomagic软件修补优化后生成实体模型,并对模型的几何精度进行误差分析。最后导入Abaqus软件中进行有限元分析前处理,生成重建手术的有限元模型并进行计算分析。结果建立了包括韧带在内的髋臼周围肿瘤切除后重建手术的有限元模型。模型有较高几何相似性及力学相似性。结论椎弓根钉棒重建法较理想的代偿了缺损区的力传导途径,术后骨盆结构完整,力学响应稳定;可视化装配法简化了含有复杂内固定器系统的有限元建模过程,高精度的逆向工程软件和优化操作保证了模型的精确度。Objective To explore a easier and more precise method of establishing the finite element model of the reconstruction following resection of peri-acetabular tumors,and the internal fixation system Method Using the CT images scanning from L3 to middle-femur to process and generate the STL model of the pelvis and the intemal fixation system by Simplewares, after visual assembling, the whole solid model including the internal fixations were to be set up after repair and optimization by Geomagic, afterwards, the error analysis will be introduced, Eventually following the preprocessing of finite Element Models by Abaqus the final finite element model is established and calculated. Result the finite element model with ligament of the reconstruction following resection of ped-acatabular tumors holds high geometry comparability and precise mechanical similarity. Conclusion The compensation using reconstruction by pedicle screws and rods makes the pathway of mechanical force signal transduction more complete. The structure of the postoperative pelvis is integrity and holds stable mechanical response; the visual assembly simplify the modeling procedure with complicated intemal fixation e and the high-precison software of reverse engineering guarantees the accuracy of the model.

关 键 词：髋臼周围肿瘤 内固定 生物力学 可视化装配 几何精度 有限元法 

分 类 号：R318.01[医药卫生—生物医学工程]