华西口腔医学杂志2012，Vol.30Issue(3)：329-332,4.DOI:10.3969/j.issn.1000-1182.2012.03.026
Tip-Edge力系后倾曲对上颌磨牙初始位移影响的三维有限元分析
Analysis of tip back bend on initial displacement of the maxillary first molar in Tip-Edge force system by three-dimensional finite element method
摘要
Abstract
Objective The aim of this study was to analyze the initial displacement of the maxillary first molar by tip back bend in Tip-Edge force system and to explore the relationships between the displacement and the degree or position of tip back bend. Methods The Tip-Edge three-dimensional finite element model was constructed by CT scan of a dry skull with all teeth. The conditions of five types of degree (20°, 30°, 40°, 50°, 60°) and four types of position (2, 4, 6, 8 mm) of tip back bend were added to the three-dimensional finite element model and the initial displacements of the maxillary first molar were calculated. Results Under the effect of tip back bend, distal and extrusive displacement of the maxillary first molar occurred. The distal and extrusive movement increased as the degree of tip back bend increased or the position of tip back bend moved distally. Conclusion The initial displacement of the maxillary first molar could be controlled by the precise control of the degree and position of tip back bend. Objective The aim of this study was to analyze the initial displacement of the maxillary first molar by tip back bend in Tip-Edge force system and to explore the relationships between the displacement and the degree or position of tip back bend. Methods The Tip-Edge three-dimensional finite element model was constructed by CT scan of a dry skull with all teeth. The conditions of five types of degree (20°, 30°, 40°, 50°, 60°) and four types of position (2, 4, 6, 8 mm) of tip back bend were added to the three-dimensional finite element model and the initial displacements of the maxillary first molar were calculated. Results Under the effect of tip back bend, distal and extrusive displacement of the maxillary first molar occurred. The distal and extrusive movement increased as the degree of tip back bend increased or the position of tip back bend moved distally. Conclusion The initial displacement of the maxillary first molar could be controlled by the precise control of the degree and position of tip back bend.关键词
三维有限元/后倾曲/差动力系/初始位移Key words
three-dimensional finite element/ tip back bend/ differential force system/ initial displacement分类
医药卫生引用本文复制引用
张翼,夏熹,邓锋,樊瑜波,王超,黄倩倩..Tip-Edge力系后倾曲对上颌磨牙初始位移影响的三维有限元分析[J].华西口腔医学杂志,2012,30(3):329-332,4.基金项目
重庆市自然科学基金资助项目(CSTC,2008BB5222 （）
CSTC,2009BB5263) （）
重庆市卫生局重点基金资助项目(2008-1-49) （2008-1-49）
