咬肌牵动的颧骨复合体三维有限元模型的建立

Three-dimensional finite element modeling of zygomatic complex with masseter forces

目的:建立颧骨复合体、咬肌牵动可分析应力状态的三维有限元模型。方法:应用MIMCS软件将颧骨复合体高突患者面部CT图像进行三维重建,使用MSC.Marc软件进行网格划分,建立三维有限元模型,并通过解剖学研究和测量,结合图像,确立咬肌的附着部位面积和肌力线方向。结果:建立了咬肌牵动的颧骨复合体生物力学分析模型,该模型共有9093个节点(咬肌1025个节点),包含39026个单元(咬肌4487个单元),与CT三位重建影像比较,形态结构一致性好。结论:运用有限元分析技术,结合咬肌牵动的功能测定所建立的生物力学模型几何相似性和力学相似性好,为颧骨复合体缩小手术提供了一种可定量化术前设计的方法。

Objective To establish the three-dimensional finite element model of zygomatic complex with masseter forces. Methods One patient with prominent zygomatic complex was adopted for thin-layer CT scanned to abtain the morphological data. The data in Dicom pattern were analyzed by MIMCS software and 3D reconstructed. MSC.Marc software was then applied to meshed and analyze the 3D finite element analysis model. Results With well-defined geometry and mesh, material properties, and muscle forces, a totally new and more real 3D finite element model of zygomatic complex with masseter forces was developed. It contained 39026 elements （4487 of masseter） and 9093 nodes（4487 of masseter）. Conclusion The established 3D finite element model of zygomatic complex with masseter forces was a effective and feasible foundation for a series biomechanical studies of zygomatic complex reduction.