有限元法建立下颌第一磨牙模型及受力分析  

Establishing a FEM oF Mandibular First Molar and Stress Analysis

作　　者：洪瑾[1] 夏文薇[1] 朱亚琴[1] 王晓仪[1] 熊焕国[2] 

机构地区：[1]上海第二医科大学附属第九人民医院口腔内科,上海200011 [2]上海第二工业大学机械工程系,上海200040

出　　处：《上海口腔医学》2001年第4期342-345,共4页Shanghai Journal of Stomatology

基　　金：上海市科学技术发展基金 ( 9844196 6 9)

摘　　要：目的　建立下颌第一磨牙的三维有限元模型 ,并观察牙齿各部位应力分布情况。方法　离体下颌第一磨牙经CT扫描及图像处理 ,通过特定的有限元软件建立三维有限元模型 ;在该模型上模拟牙咬合情况进行垂直和侧向加载 ,计算出牙体部及根管壁各部位的最大拉应力、最大压应力和能量应力。结果　下颌第一磨牙的应力最大值出现在直接加载处 ,倾斜加载比垂直加载引起的应力大。自冠方向根方 ,各部位最大应力逐步减小 ,在髓底根管口处有一上升峰值 ,尤以倾斜加载时更为显著。管壁的应力小于牙体的应力 ,变化趋势与牙体的应力相似。结论　采用有限元法分析牙齿各部位的应力情况 ,是一种简捷、有效、可靠且安全的方法。Objecctive Establishing a finite-element model of mandibular first molar with analysis of the stress distribution to each of the tooth parts on the model. Methods The right mandibular first molar in vitro was scanned and the image was processed. The three dimensional finite-element model was established by the special software and loaded on it. Results Stress distribution on each part of the tooth was obtained. The maximum values of compressive stress, tensile stress and mises stress were calculated. Conclusion In the research and analysis of the tooth stress, the finite-element method is simple, effective, safe and reliable.

关 键 词：下颌第一磨牙 CT扫描 三维有限元 应力分析 

分 类 号：R78[医药卫生—口腔医学]