两种厚度膜片组合对兔牙正畸移动的组织学研究  

Histological changes after orthodontic tooth movement with thermoplastic materials of two different thickness in rabbits

作　　者：李光辉 潘晓岗[2] Li Guanghui;Pan Xiaogang(Department of Orthodontics,Affiliated Stomatological Hospital of Fujian Medical University,Fuzhou 350002,China;Department of Orthodontics,Ninth People's Hospital,College of Stomatology 9 Shanghai Jiao Tong University School of Medicine,Shanghai 200011 ,China)

机构地区：[1]福建医科大学附属口腔医院口腔正畸科,350002 [2]上海交通大学附属第九人民医院口腔正畸科,200011

出　　处：《中华口腔正畸学杂志》2019年第1期33-36,共4页Chinese Journal of Orthodontics

基　　金：福建省卫生计生青年科研课题B类(2017-2-35).

摘　　要：目的应用不同厚度膜片制成的无托槽隐形矫治器对兔下颌中切牙正畸移动的组织学研究.方法选用7只新西兰大白兔,实验组为不同厚度膜片隐形矫治器加力组3只,设计戴用3步矫治器,每步牙移动0.33mm;对照组为常用厚度膜片隐形矫治器加力组3只,设计戴用3步矫治器,每步牙移动0.20mm;空白对照组1只,不进行矫治处理。矫治后处死取下前牙标本作组织学检测分析。结果实验组和对照组兔中切牙的牙周膜均表现为远中侧受挤压而紧缩,近中侧牙周膜被拉伸而增宽。随着矫治的进行,两组均表现出牙周膜血管扩张充血、分化出破骨细胞、牙槽骨产生成骨活动和类骨质的新生。结论本实验提供了一种操作简便、稳定可靠的兔下前牙隐形矫治模型,选用不同厚度膜片进行隐形矫治,在组织学形态上的改变并没有明显不同。Objective To explore histological study on the orthodontic tooth movement on lower central incisors of rabbits with thermoplastic materials of different thickness. Methods A group of 7 male New Zealand rabbits were randomly divided into three groups: The experimental group (n=3) was designed move teeth by 3 steps,0. 33 mm each;the control group (n = 3) was designed to move teeth 3 steps, 0. 20 mm each;and the blank control group (n = 1) was directly sacrificed for histological observation. Results In the experimental and control group, the periodontal ligaments of the incisors in the rabbits were compressed in the distal side and stretched in the mesial side. Both groups showed periodontal blood vessel dilation and congestion, differentiation of osteoclasts, alveolar bone formation and osteogenesis. Conclusions The rabbit lower incisor tooth movement model with clear aligner was established. This model is easy and stable. Though aligners with different thickness are applied, the periodontal tissue remodeling is barely different.

关 键 词：无托槽隐形矫治器 牙移动 热压膜材料 厚度 牙周组织改建 

分 类 号：R783.5[医药卫生—口腔医学]