摘要
在CT图像的基础上利用Mimics软件完成脊椎轮廓三维重建,通过3-matic模块对模型进行光滑处理并以iges格式导入UG软件中进一步构建椎体曲面模型,并利用缝合及建模相关功能完成脊椎模型的三维重构;通过UG软件进行网格划分,设置材料属性,添加边界条件及载荷并进行有限元分析,完成螺钉内固定应力分析;椎弓根螺钉直径在3.5~5.5 mm范围变化时,随着螺钉直径的增大有利于改善脊椎骨应力的大小;随着螺钉长度变化,脊椎骨应力的大小变化不明显。
3-D contour model is generated by Mimics software based on the CT image. The model is smoothed by3-matic module and imported into the UG software with iges format file. The 3D reconstruction of the spine model is completed by using the suture and modeling related functions. The stress analysis of the screw internal fixation is completed by dividing grid with the UG software,setting up the material properties,adding boundary conditions and finite element analysis. While the diameter of screw is in range from 3. 5 mm to 5. 5 mm,it could improve the value of stress on the spinal column with the increase of pedicle screw diameter. The variation of stresses of vertebra is not obvious with the changing of screw diameter.
出处
《贵州科学》
2016年第2期74-77,共4页
Guizhou Science
关键词
脊椎
三维重建
有限元分析
应力
spinal column
3-D reconstruction
finite element analysis
stress
