应用Mimics和ANSYS软件建立下颌骨三维有限元模型的方法学研究

Establishment of three-dimensional finite element model of human mandible with Mimics and ANSYS software

目的:探讨一种高效的三维有限元建模方法,为下颌骨的整形修复提供生物力学仿真基础。方法:对1名男性志愿者进行下颌骨螺旋CT扫描,将获取的Dicom格式数据在Mimics 10.01软件中进行完整下颌骨3D重建和面网格划分,所得的.lis文件导入ANSYS 12.0软件完成体网格划分并写出PREP7文件,再将PREP7文件导入Mimics 10.01进行赋值,最后导入ANSYS 12.0生成完整下颌骨的三维有限元模型。结果:建立了人体完整下颌骨的三维有限元模型,共得到51 735单元和78 993节点,根据CT值为下颌骨赋予了10种不同的材料属性。结论:高效、精确地建立了人体下颌骨的三维有限元模型。

Objective： To explore an effective method for the establishment of three-dimensional （3-D） finite element model of hu- man mandible. Methods： Mandible of a male volunteer was scanned by spiral CT and the Dicom format images were imported into Mimics 10.01 software to reconstruct 3-D mandibular model, then remeshed. After meshed into entities in ANSYS 10.0 software, the model of. lis file and PREP7 file were transfered into Mimics for assignment. Once again, the PREP7 file was imported into Ansys to establish 3-D finite element model. Results： 3-D finite element model of the mandible was es＇tablished precisely with 51 735 elements and 78 993 nodes. 10 types of material wei＊e assigned to different parts of mandible according to CT gray value. Conclusion： 3-D finite element model of human mandible can be established by Mimics and ANSYS software precisely and effectively.