半脊椎所致先天性脊柱侧凸三维有限元模型的建立  

Establishment of three-dimensional finite element model of congenital scoliosis caused by hemivertebrae

作　　者：刘少华[1] 张宏其[1] 吴建煌[1] 郭超峰[1] 唐明星[1] 王昱翔[1] 邓盎[1] 

机构地区：[1]中南大学湘雅医院脊柱外科(湘雅脊柱外科中心),湖南长沙410008

出　　处：《中国现代医学杂志》2013年第28期33-37,共5页China Journal of Modern Medicine

基　　金：中央高校基本科研业务费专项资金(No:2012QNZT126);湖南省社会发展科技支撑计划重点项目(No:2009SK2012)

摘　　要：目的构建半脊椎所致先天性脊柱侧凸三维有限元模型,为先天性脊柱侧凸生物力学仿真研究建立理想的数字化平台。方法选择1例13岁女性先天性脊柱侧凸志愿者作为研究对象,应用螺旋CT扫描,获得Dicom格式CT图像,将CT图像导入逆向工程软件Mimics 10.01,建立包括胸-腰-骶椎和胸廓等结构的完整脊柱侧凸三维几何模型。运用软件HyperMesh 8.0做网格质量控制和实体单元划分,并赋材料属性,生成半脊椎所致先天性脊柱侧凸三维有限元模型。结果成功构建了完整的半脊椎所致先天性脊柱侧凸三维有限元模型,共划分节点109 936个,四面体单元411 988个,壳单元87 847个,线缆单元690个和杆单元138个。结论该研究建立了完整、逼真的半脊椎所致先天性脊柱侧凸三维有限元模型,为进一步的生物力学研究提供了数字化模型。[Objective] To set up three-dimensional finite element model of congenital seoliosis caused by hemivertebrae for building ideal digitization platform for further biomechanical study. [ Methods ] A 13-year-old fe- male patient with congenital scoliosis caused by hemivertebrae was included as volunteer for current study. CT Di- com images obtained form CT transverse scanning were imported into Mimics lO.O1 to form qualified three-dimen- sional geometric model, including all thoraco-lumbar-sacral vertebrae and thoracic cage, which was further deliv- ered to HypherMesh 8.0 to build three-dimensional finite element model by mesh partition and quality control. A variety of material parameters were given to different mesh according to references. [ Results ] A complete three-di- mensional finite element model of congenital scoliosis caused by hemivertebrae was built successfully, in consist of 109 936 nodes, 411 988 tetrahedron elements, 87 847 shell elements, 690 cable elements and 138 rod elements. [ Conclusions ] Finite element model built of congenital scoliosis caused by hemivertebrae was intact and lifelike, which can be used as the digital model for further biomechanical simulation study.

关 键 词：先天性脊柱侧凸 半脊椎畸形 有限元分析 

分 类 号：R682.13[医药卫生—骨科学]