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目的:建立玻璃离子水门汀垫底、近中-(MO)嵌体修复的下颌第一磨牙三维有限元模型。方法:采用Micro-CT扫描,应用Mimics、UG、Ansys、Midas-FEA等软件建立玻璃离子水门汀垫底、MO嵌体修复的三维有限元模型,并初步验证其有效性。结果:建成后的模型共生成265814个单元,53610个节点,与实体组织具有良好的力学和几何学相似性。应力云图可见Von-mises应力和第三主应力主要集中在牙颈部和咬合面的凹陷处,应力峰值均发生在颊侧牙颈部区域。结论:所建立的模型能够较真实地模拟实际情况,可为不同材料嵌体修复的生物力学研究提供有效平台。
Objective: To establish a three-dimensional finite element model of mandibular first molar restored with glass ionomer cement at the bottom and near-mid- (MO) inlay. Methods: Three-dimensional finite element model of glass ionomer cement underlay and MO inlay was established by using Micro-CT scanning, software Mimics, UG, Ansys and Midas-FEA. The validity of the model was verified. Results: After the completion of the model, a total of 265814 units and 53610 nodes were generated, which has good mechanical and geometrical similarities with real tissues. The stress cloud shows that the Von-mises stress and the third principal stress are mainly concentrated in the dent of the cervical and occlusal surfaces, and the stress peaks occur in the buccal dental region. Conclusion: The established model can more accurately simulate the actual situation, which can provide an effective platform for biomechanical studies of inlay repair with different materials.