上海口腔医学 ›› 2021, Vol. 30 ›› Issue (1): 38-43.doi: 10.19439/j.sjos.2021.01.008

• 论著 • 上一篇    下一篇

双膜透明矫治器移动兔下颌中切牙的效果评价

李光辉1, 潘晓岗2   

  1. 1.福建医科大学附属口腔医院 口腔正畸科,福建 福州 350002;
    2.上海交通大学附属第九人民医院·口腔医学院 口腔正畸科,国家口腔疾病临床医学研究中心, 上海市口腔医学重点实验室,上海市口腔医学研究所,上海 200011
  • 收稿日期:2020-02-11 修回日期:2020-04-03 出版日期:2021-02-25 发布日期:2021-04-02
  • 通讯作者: 潘晓岗,E-mail:xgpan70@126.com
  • 作者简介:李光辉(1991-),硕士,住院医师,E-mail:liguanghui@sjtu.edu.cn
  • 基金资助:
    福建省卫生计生青年科研课题B类(2017-2-35)

Experimental study on the effect of tooth movement with thin and thick aligners in rabbits

LI Guang-hui, PAN Xiao-gang   

  1. 1. Department of Orthodontics, Affiliated Stomatological Hospital of Fujian Medical University. Fuzhou 350002, Fujian Province;
    2. Department of Orthodontics, Shanghai Ninth People’s Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine; National Clinical Research Center for Oral Diseases; Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology. Shanghai 200011, China;
  • Received:2020-02-11 Revised:2020-04-03 Online:2021-02-25 Published:2021-04-02

摘要: 目的:应用双膜透明矫治器对兔下颌中切牙进行正畸移动,评价双膜透明矫治器移动牙的效果。方法:选用6只新西兰大白兔,实验组为双膜透明矫治器加力组(3只),设计戴用3步矫治器,每一步牙移动0.33 mm,先戴用薄膜透明矫治器2 d,再戴用厚膜透明矫治器2 d;对照组为常规厚度膜片透明矫治器加力组(3只),设计戴用3步矫治器,每一步牙移动0.20 mm,每步矫治器戴4 d。在每组兔分别戴用第1、2和3步矫治器后制取模型,测量牙移动数据。采用SPSS 19.0软件包对数据进行统计学分析。结果:2组牙移动表达的精确度从牙冠切端向龈端逐渐降低,实验组的精确度随矫治时间增加呈下降趋势,而对照组的精确度随矫治时间增加无明显变化。实验组牙冠切端、中端和龈端牙移动速率均显著大于对照组(P<0.001)。结论:兔下颌中切牙在透明矫治器的作用下产生倾斜移动。采用双膜透明矫治器矫治,牙移动速率加快,但牙移动表达的精确度降低。

关键词: 双膜透明矫治器, 牙移动, 热压膜材料, 精确度

Abstract: PURPOSE: To explore the effect of tooth movement on lower incisors of rabbits with thin and thick aligners. METHODS: A group of 6 male New Zealand rabbits were randomly divided into 2 groups, the experimental group(n=3) was designed to move the lower incisors distally by 3 steps with thin and thick aligners(0.625 and 0.75 mm),0.33 mm each;the control group (n=3) was designed to move the teeth by 3 steps with aligner of conventional thickness (0.75 mm), 0.20 mm each. Polyvinyl siloxane impressions were taken before and after aligner placement. The data of tooth movement were measured. SPSS 19.0 software package was used for statistical analysis. RESULTS: The accuracy of tooth movement expression in both groups decreased gradually from the incisal part to the gingival part. The rate of tooth movement in the experimental group was significantly higher than that of the control group(P<0.001). CONCLUSIONS: The tooth movement of rabbit mandibular central incisor was tipping with the clear aligner. The rate of tooth movement was increased by applying thin and thick aligners,but the accuracy of tooth movement was decreased.

Key words: Thin and thick aligner, Tooth movement, Thermoplastic material, Accuracy

中图分类号: