上颌埋伏尖牙及其支持组织三维有限元建模方法的研究  

The establishment of three dimensional finite element model of a maxillary impacted canine and its support tissues

作　　者：靳淑梅[1] 王媛[1] 任旭升[1] 张丽娜[1] 张君[1] 

机构地区：[1]山东大学口腔医学院正畸科,山东济南250012

出　　处：《上海口腔医学》2010年第1期95-99,共5页Shanghai Journal of Stomatology

基　　金：山东省科学技术发展计划项目(2006GG2202031)~~

摘　　要：目的:利用螺旋CT技术与三维有限元方法,建立统一坐标系下上颌埋伏尖牙及其支持组织的三维有限元模型,为正畸牵引治疗埋伏尖牙的研究提供数字模型。方法:从正畸患者中选取一埋伏牙病例为实验样本,利用螺旋CT设备,Mimics、Unigraphic(UG)等软件,建立埋伏牙及其支持组织的三维实体(CAD)模型,并将建立的3种CAD模型导入MSC.Mentat软件中进行网格划分,建立可用于力学分析的三维有限元模型。结果:利用螺旋CT设备,Mimics、Unigraphic(UG)等软件,建立了上颌埋伏尖牙及其支持组织(牙周膜和上颌骨整体)的三维实体(CAD)模型,所建模型具有较高的几何相似性。结论:利用螺旋CT扫描技术、Mimics、UG、MSC等工程软件建立的上颌埋伏尖牙三维有限元模型精确度高,结构完整,网格质量好,可以满足对埋伏牙进行各种模拟牵引加载的需求。PURPOSE： To establish a three dimensional finite element model of a maxillary impacted canine and its support tissues by means of finite element method （FEM） and spiral CT which can offer digital model for orthodontic traction. METHODS： A patient with a completely bony impacted maxillary canine was chosen. The CAD model of the canine and its surrounding tissues was established using spiral CT equipment, Mimics and Unigraphic. The CAD model was changed to FEM models by MSC. Mentat which could cut nets in CAD models. RESULTS： With the use of spiral CT, Mimics,UG and MSC, FEM model of the maxillary impacted canine and its support tissues,and the whole maxilla was constructed and the model was of high geometrical similarity. CONCLUSION： The FEM model of maxillary impacted canine established by spiral CT,Mimics,UG and MSC has high accuracy, integrated constitution and optimized mesh which can be taken into account in the course of the treatment planning prior to starting therapy.

关 键 词：上颌尖牙 埋伏牙 三维有限元 

分 类 号：R783.5[医药卫生—口腔医学]