纤维桩核冠修复上颌中切牙三维有限元模型的建立

Establishment of a three-dimensional finite element model of the maxillary central incisor restored with fiber post-core crown

背景:建立有限元模型对缺损的上颌中切牙进行应力分析可为临床修复方法提供选择依据。目的:建立纤维桩全瓷冠修复上颌中切牙的三维有限元应力分析模型。方法:通过螺旋CT扫描、Mimics软件和Ansys软件建立冠缺损1/2的上颌中切牙采用纤维桩全瓷冠修复的三维有限元模型,模拟咬合加载,记录组织的VonMises应力和最大拉应力。结果与结论:建立了冠缺损1/2的上颌中切牙三维有限元模型,并模拟纤维桩核全瓷冠修复,与临床实际情况接近。运用螺旋CT、Mimics软件、Ansys软件能有效建立牙齿组织的三维有限元模型,模拟临床实际情况,并能以此演化为其他修复情况的模型。

BACKGROUND： A finite element model is useful in the stress analysis of the maxillary central incisor, providing evidence for selection of clinical restoration methods. OBJECTIVE： To establish the three-dimensional finite element model of the maxillary central incisor restored with fiber post-core crown for the stress analysis. METHODS： The three-dimensional finite element model of half damaged maxillary central incisor restored with fiber post-core crown was established by spiral CT, Mimics software and ANSYS software. The von Mises stress and maximal tensile stress were recorded. RESULTS AND CONCLUSION： The three-dimensional finite element model of half damaged maxillary central incisor restored with fiber post-core crown was established to simulate fiber post-core crown restoration. It was similar to the clinical case. The application of spiral CT, Mimics software and ANSYS software can successfully establish the three-dimensional finite element model of tooth structure. The model is similar to clinical case, and can develop to other similar models.