上颌前牙段阻抗中心定位的有限元研究

发布时间：2018-03-24 03:03

本文选题：上颌前牙　切入点：阻抗中心　出处：《生物医学工程学杂志》2014年05期

【摘要】：在ANSYS13.0软件中建立6个上前牙及前颌骨的三维有限元模型,前牙以不锈钢唇弓和腭侧支架紧密固定。水平加载实验中,对其双侧牵引钩同一高度施加1.5N水平向后牵引力,施力点距中切牙切缘分别为7~21mm;垂直加载实验中,在腭侧支架中线上施加1.5N垂直压低力,施力点距中切牙切缘分别为4~16mm。经求解得出各种工况下模型内各节点的三维位移和应力分布。水平加载中,牵引高度距中切牙切缘14mm时,6个前牙的舌向位移和牙周膜的应力分布最为均匀;垂直加载中,作用点距中切牙切缘12mm时,6个前牙的压低位移和牙周膜的应力分布最为均匀。本研究认为标准大小的上颌6个前牙的阻抗中心(CRe)位于中切牙切缘根方14mm、腭侧12mm处,可为正畸理论研究和临床实践提供指导。
[Abstract]:Six 3D finite element models of anterior teeth and maxillary bones were established in ANSYS13.0 software. The anterior teeth were tightly fixed with stainless steel labial arch and palatal support. In the horizontal loading experiment, 1.5 N horizontal backward traction was applied to the bilateral traction hooks at the same height. In the vertical loading experiment, 1.5 N vertical force was applied on the midline of the palatal bracket. The incisor edge of the middle incisor is 4 ~ 16mm. the three dimensional displacement and stress distribution of each node in the model under various working conditions are obtained. When the traction height was far from the incisor edge of the central incisor 14mm, the lingual displacement and the stress distribution of the periodontal membrane were the most uniform in the 6 anterior teeth, and in the vertical loading, The pressure displacement and the stress distribution of the periodontal ligament were the most uniform when the incisor edge of the central incisor was 12mm. It was considered that the impedance center of the 6 maxillary anterior teeth of the standard size was 14 mm at the incisal edge of the central incisor and at the 12mm in the palatal side. It can provide guidance for theoretical research and clinical practice of orthodontics.
【作者单位】：福建医科大学附属口腔医院正畸科;福建医科大学口腔医学院;
【基金】：2012年福建省教育厅科技项目资助(JB12125)
【分类号】：R783.5

【共引文献】