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

目的评估骨皮质切开术辅助前磨牙压低的加速效应和牙根、牙槽骨改建情况。方法 8只比格犬的下颌骨两侧随机分为实验侧、对照侧,实验侧用骨皮质切开术和微种植体支抗（MIA）压低第三前磨牙（P3）和第四前磨牙（P4）,对照侧用MIA压低P3和P4。在术前和加力后2、4、8、12周分别拍摄锥形束CT,分析P3、P4的压低量、根分叉和根尖区的牙根吸收量以及周围牙槽骨高度降低量。结果实验侧牙齿的压低量明显大于对照侧（P〈0.05）;实验侧和对照侧牙齿根分叉、根尖区的牙根均出现吸收,加力后12周实验侧根尖区牙根吸收小于对照侧（P〈0.05）;牙槽骨高度随着加力时间的延长而降低,加力后8、12周时,对照侧牙槽骨高...

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Bibliographic Details
Published in华西口腔医学杂志 Vol. 34; no. 3; pp. 267 - 271
Main Author 喻凤 邓锋 张翼 朱亚玲 张向凤 张赫 王华桥
Format Journal Article
LanguageChinese
Published 重庆医科大学附属口腔医院正畸科 口腔疾病与生物医学重庆市重点实验室重庆市高校市级口腔生物医学工程重点实验室,重庆,401147%云南省第二人民医院正畸科,昆明,650021 2016
Subjects
压入移动
微种植体支抗
牙根吸收
骨皮质切开术
mini-screw implant anchorage
牙根吸收
root resorption
骨皮质切开术
intrusion movement
微种植体支抗
cortico-tomy
压入移动
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ISSN1000-1182
DOI10.7518/hxkq.2016.03.010

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Summary:目的评估骨皮质切开术辅助前磨牙压低的加速效应和牙根、牙槽骨改建情况。方法 8只比格犬的下颌骨两侧随机分为实验侧、对照侧,实验侧用骨皮质切开术和微种植体支抗（MIA）压低第三前磨牙（P3）和第四前磨牙（P4）,对照侧用MIA压低P3和P4。在术前和加力后2、4、8、12周分别拍摄锥形束CT,分析P3、P4的压低量、根分叉和根尖区的牙根吸收量以及周围牙槽骨高度降低量。结果实验侧牙齿的压低量明显大于对照侧（P〈0.05）;实验侧和对照侧牙齿根分叉、根尖区的牙根均出现吸收,加力后12周实验侧根尖区牙根吸收小于对照侧（P〈0.05）;牙槽骨高度随着加力时间的延长而降低,加力后8、12周时,对照侧牙槽骨高度降低量明显小于实验侧（P〈0.05）。结论骨皮质切开术能加速磨牙的压低,同时能减少压低过程中的牙根吸收。
Bibliography: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
ISSN:1000-1182
DOI:10.7518/hxkq.2016.03.010