摘要
目的:采用动态有限元方法模拟前牙咬合过程,分析上、下前牙在功能咬合过程中的运动和受力变化规律,为全程描述前牙生理咬合过程提供理论依据。方法:建立上、下中切牙三维有限元模型,使用动态有限元法,定义上、下颌前牙咬合接触关系,在模拟前牙动态咬合过程中,分析上、下颌中切牙所承受的Von Mises应力与咬合过程的关系。结果:在咬合过程中,上、下前牙不同部位所承受的应力随咬合时间及下颌运动过程而变化,上颌前牙牙冠唇、舌侧颈部以及咬合功能面承受较大的Von Mises应力,下前牙在整个咬合过程中牙冠近、远中颈部始终保持较高的应力水平。结论:动态有限元法对咬合过程的模拟可以全程、准确描述出前牙的运动状况和上、下前牙随咬合运动的应力和变形趋势,为描述前牙生理咬合过程、促进动态有限元法在口腔生物力学研究中的应用提供理论依据。
PURPOSE： To study the stresses and movement of central incisor with three-dimensional dynamic finite element method, in order to understand and describe the process of occluding. METHODS： A three-dimensional dynamic finite element model of central incisor was established, and the definition of contact between the surfaces of occlusive contact was defined as Hard Contact （ABAQUS） to simulate the process of occluding. RESULTS： The stresses on the central incisor varied with the time of overbite and the movement of teeth during dynamic occluding. Higher stresses were observed in the areas of buecal-lingual cervical marginal on the upper teeth, but in the near-far cervical marginal on the lower. CONCLUSIONS： Dynamic finite element method can help to picture the process of articulation and the conditions of teeth momentarily, and could be used for the research of oral biomechanies effectively.
出处
《上海口腔医学》
CAS
CSCD
2008年第6期648-651,共4页
Shanghai Journal of Stomatology
关键词
前牙
咬合
有限元法
应力分析
Anterior teeth
Occlusion
Finite element method
Stress analysis
作者简介
辛海涛（1965-），男，副教授，副主任医师，博士，主要从事修复临床和口腔生物力学研究[通讯作者]辛海涛，Tel：029-84776126，E-mail：xhthmj@fmmu．edu．cn
