基于锥形束CT图像重建含完整牙列下颌骨的三维有限元模型

Reconstruction of three dimensional finite element model of the dentulous mandible based on cone beam CT images

目的快速、准确地建立含完整牙列下颌骨的三维有限元模型,并进行相关的生物力学性能分析,为更多关注医学有限元分析的研究者提供参考。方法采用锥形束CT扫描技术获取患者颅骨的DICOM数据,应用Mimics软件快速建立含全牙列下颌骨的三维有限元模型,并对其所含多种材料属性进行赋值,再导入Ansys软件进行分析处理。结果成功建立含完整牙列下颌骨的三维有限元模型,实现了对下颌骨不同结构的材料赋值,并进行模型加载,验证其有效性。结论采用锥形束CT以及Mimics和Ansys软件相结合的方法建立多种材料属性的含完整牙列下颌骨的三维有限元模型,并为对其开展更进一步的生物力学性能分析奠定了基础。

Objective To quickly and accurately construct three dimensional finite element model of the dentulous mandible and conduct relevant analyses of its biomechanical properties, so as to provide reference for more researchers who focus on medical finite element analysis. Methods DICOM data of patient＇s skull is obtained with cone beam CT technology. Three dimensional finite element model of the dentulous mandible was quickly constructed with Mimics software and assign the defined values to the properties of contained materials and then input into Ansys software for analysis. Results Three dimensional finite element model of the dentulous mandible was successfully constructed; material assignment of different structures of mandible was realized and its validity was verified through model load. Conclusion Three dimensional finite element models of the dentulous mandible of different material properties constructed with the method of combining cone beam CT, Mimics and Ansys soft- ware comply with the clinical circumstances and lay the foundation for further analysis of biomeehanical properties.