摘要
背景:自锁托槽矫治器体积较小,有利于舒适,有利于口腔卫生的保护,越来越受正畸医师的关注。目的:探讨不同矫治器正畸作用下兔牙周组织改建过程中张力侧组织病理学的变化。方法:选用64只健康大耳白兔建立正畸牙移动的动物模型,随机分为4组。对照组、MBT矫治器组、Begg矫治器组和Damon Ⅲ矫治器组,MBT矫治器组、Begg矫治器组和Damon Ⅲ矫治器组分别将MBT矫治器、Begg矫治器、Damon Ⅲ矫治器结扎在上颌切牙与第一磨牙之间,牵引上颌第一磨牙向近中移动1mm。结果与结论:加力14d时,相比于对照组,MBT矫治器组、Begg矫治器组和Damon Ⅲ矫治器组兔张力侧牙周骨组织骨小梁的体积、骨小梁宽度变宽,间隙变窄,成骨细胞和破骨细胞数量增加(P<0.05)。加力21d时,与MBT矫治器组及Begg矫治器组相比,Damon Ⅲ矫治器组兔张力侧牙周骨组织骨小梁体积和宽度增加,骨小梁间隙缩小,成骨细胞和破骨细胞数量增加(P<0.05)。提示在正畸牙移动过程初期,MBT矫治器、Begg矫治器、Damon Ⅲ矫治器均有正畸效果,且其中Damon Ⅲ矫治器的后期效果优于MBT矫治器、Begg矫治器。
BACKGROUND：Self-locking bracket appliance is small in size,comfortable,and conducive to the protection of the oral hygiene,which has gained more and more attention from orthodontists.OBJECTIVE：To investigate the role of different orthodontic appliances in the histopathological changes in rabbit periodontal tissue in the tension side.METHODS：Totally 64 healthy rabbits were selected to establish the animal model of orthodontic tooth movement,and then were randomly divided into four groups：control group,MBT appliance group,Begg appliance group,and Damon III appliance group.The appliance was ligated between the maxillary incisor and the first molar,pulling the 1-mm mesial movement of the maxillary first molar.RESULTS AND CONCLUSION：At 14 days of appliance application,trabecular bone volume and trabecular width were significantly increased,the trabecular space became narrower,and the number of osteoblasts and osteoclasts was dramatically increased in the MBT appliance group,Begg appliance group,and Damon Ⅲ appliance group as compared with the control group（P〈0.05）.At 21 days,Damon Ⅲ appliance had a superior effect over the MBT appliance and Begg appliance in trabecular bone volume,trabecular width,trabecular space and the number of osteoblasts and osteoclasts（P〈0.05）.These findings indicate that in the initial phase of orthodontic tooth movement,MBT appliance,Begg appliance,and Damon Ⅲ appliance all have orthodontic effects,and furthermore,Damon Ⅲ appliance is better than the MBT appliance and Begg appliance in the late stage.
出处
《中国组织工程研究》
CAS
CSCD
2012年第50期9337-9343,共7页
Chinese Journal of Tissue Engineering Research
