不同工况下颧弓三维有限元分析

Three- dimensional finite element analysis of zygomatic arch in different conditions

目的:了解正常颧弓三维有限元模型在不同载荷条件下的应力分布情况,探讨其生物力学行为。方法:利用螺旋CT扫描图像,通过相关软件建立颧弓三维有限元模型,在UG NX5.0中模拟载荷分别作用于颧弓外侧的前、中、后以及整个外侧部分,按10N、30N、60N、90N、120N、150N六个级别模拟六种工况,记录分析该有限元模型在不同工况下的应力及位移情况。结果:在六种工况下,除应力值大小不同外,应力集中部位固定,颧弓存在着三个应力较大的区域,分别为颧弓根部转折处、颧颞缝部位以及靠近颧骨端转折处。应力作用于颧弓中间部分时,模型最大应力值高于其他作用部位。结论:实验分析较好地解释了颧弓常见骨折部位的力学机理,为新型颧弓骨折固定装置的设计提供了指导作用。

Objective： To understand the stress distribution of three-dimensional finite element analysis of zygomatic arch under different loading conditions and explore the feature of biomechanical reaction. Methods： The zygomatic arch data scanned by Spiral-CT was used to establish 3D model by software. Then different forces （10N, 30N, 60N、 90N, 120N, 150N） were applied to the specific position of zygomatic model by the use ofUG NXS.0 software. The stress distri- bution and displacement were recorded and analyzed. Results： The stress concentration positions under six different stress- es were focus in three high stress regions, the turning point of roots of zygomatic arch, zygomaticotemporal suture site and near the end of the turning point ofzygomatic bone. The maximum stress value of zygomatic model was higher than others when the stress acting on the middle part of the zygomatic arch. Conclusions： The mechanical mechanism of common frac- ture site in the zygomatic arch was explained, which provided guidance and feasible foundation for the design of new zygo- matic arch flacture fixation device.