嵌体修复下颌第一磨牙残冠的三维有限元模型的建立

Establishment of Three-dimensional Finite Element Model of Post-inlay Restoration for Residual Crown of Lowers First Molar

【目的】建立带桩嵌体修复下颌第一磨牙残冠的三维有限元模型。【方法】制成第一磨牙残冠的制锁式带桩嵌体修复体的模型，将该模型置于水杯中，利用螺旋CT扫描，通过图像合成软件建立三维数字模型，结合大型有限元软件ANSYS进行建模。【结果】建成后三维有限元模型与实体组织具有良好的几何相似性。【结论】将牙体修复模型置于水中，经螺旋CT扫描并与有限元方法结合起来，可以建立复杂的牙模型，且能真实地模拟实际情况，使用性好。

[Objective] To establish the three-dimensional （3-D） finite element （FE） model of post-inlay restoration for residual crown of lower first molar. [Methods] The 3-D FE model was constructed by preparing the model of braking-lock post-inlay restoration for residual crown of the lower first molar, then the model was put into water in the cup. Spiral CT scanning was performed and the 3-D digital model was constructed by image synthesis software, then the large scale FE software ANSYS was used to model.[Results] The constructed model has a good geometric similarity to the morphology of the three-dimensional images. [Conclusion] The 3-D FE model combining the CT technology with FE model can be used to construct complex dental models, simulate the oral prosthetics and structure actually, and provide a method for research.