下颌磨牙不同类型缺损的纤维桩核冠三维有限元模型的建立

The Establishment of Three-dimensional Finite Element Models of Fiber Post-core Crown with Different Types of Mandibular Molars Defects

目的:建立下颌第一磨牙不同类型缺损及纤维桩核冠的三维有限元模型。方法:通过螺旋CT三维扫描方法,应用MIMICS10.01、Multiple Slice Edit、Calculae 3D、Edit Mask in 3D、Geomagic Studio、Ansys一系列操作软件,并按口腔修复学设计要求建立第一磨牙不同组织的三维有限元模型。结果:建立的烤瓷冠、纤维桩核、牙本质、牙骨质、牙周膜、牙槽骨等不同组织及各种牙缺损修复的三维有限元模型,准确、清晰、直观、完整、适合生物力学研究。结论:本实验建模方法科学先进、方便快捷,所建模型有良好的生物力学与几何力学相似性。为临床口腔提供了一种快捷而精确的有限元建模方法。

Objective To establish the three-dimensional finite element model of fiber post-core crown in mandibular first molar with different types of defects and their homologous. Methods The mandibular first molar of volunteer was scanned by spiral CT,and then a series of operating softwares,which includ MIMICS10. 01,Multiple Slice Edit,Calculae 3D,Edit Mask in 3D,Geomagic Studio,and Ansys were used to establish the three-dimensional finite element model according to the design principle of prosthodontics. Results The three-dimensional finite element model of different tissues including ceramic crown,post crown,dentine,cementum,pericementum,and alveolar bone have been established and various types of tooth defects repair,which was suitable for biomechanics research with its accurate,clear,visual and integrity characteristic. Conclusion Compared with normal tooth,the model has good similarity in biomechanics and geometry mechanics. This study provides a fast and accurate approach of finite element modeling for clinical oral.