华西口腔医学杂志2016，Vol.34Issue(3)：267-271,5.DOI:10.7518/hxkq.2016.03.010
骨皮质切开术对比格犬前磨牙压入移动影响的三维形态学研究
Three-dimensional morphological analysis of corticotomy-assisted intrusion of premolars in Beagle dogs
摘要
Abstract
Objective This study aims to identify the effects of corticotomy-assisted orthodontic premolar intrusion and evaluate the changes of root resorption and the alveolar bone. Methods Both sides of the mandible of eight male Beagle dogs were randomly assigned into experimental and control groups. The third (P3) and fourth (P4) premolars were intruded with both mini-screw implant anchorage (MIA) and corticotomy on the experimental side. By contrast, P3 and P4 were intruded with MIA alone on the control side. During pre-operation and after 2, 4, 8, and 12 weeks of orthodontic force applications, cone beam computed tomography was performed on every dog. The distance of tooth intrusion and root resorption of furcation, as well as the apex and height changes of the alveolar bone were measured and analyzed. Results The intrusion distance of premolars on the experimental side was greater than that on the control side (P<0.05). The root of furcation and apex on both sides occurred in root resorption, and the root resorption of the apex on the experimental side was lighter than that on the control side after 12 weeks of force application (P<0.05). The alveolar bone height decreased, and the height reduction distance on the experimental side was greater than that on the control side after 8 and 12 weeks of force application (P<0.05). Conclusion Corticotomy accelerates orthodontic molar intrusion and reduces root resorption.关键词
微种植体支抗/骨皮质切开术/压入移动/牙根吸收Key words
mini-screw implant anchorage/cortico-tomy/intrusion movement/root resorption分类
医药卫生引用本文复制引用
喻凤,邓锋,张翼,朱亚玲,张向凤,张赫,王华桥..骨皮质切开术对比格犬前磨牙压入移动影响的三维形态学研究[J].华西口腔医学杂志,2016,34(3):267-271,5.基金项目
重庆渝北区科委基金[渝北财教（2011）31号]；重庆市卫生局基金（2012-2-131，2013-2-069）Support by：Yubei District of Chongqing, Science and Technology Commission Fund [Yubei Finance and Education (2011) No.31] （2011）
Chongqing Municipal Health Bureau Fund (2012-2-131,2013-2-069) （2012-2-131,2013-2-069）
