MDD矫治器与三种常见固定矫治器在初期排齐阶段对前牙三维移动变化影响的对比研究  

A Comparative Study on Three-dimensional Movement of Anterior Teeth between Applying MDD Appliances and Applying Three Common Fixed Appliances in the Initial Alignment Stage

作　　者：胡波[1] 宋锦璘[1] 吴鹏[2] 何平[3] 邓锋[1] 高翔[1] 

机构地区：[1]重庆医科大学附属口腔医院,重庆市口腔疾病与生物医学研究中心,重庆401147 [2]山东省新汶矿业集团莱芜中心医院口腔科,莱芜271103 [3]四川省达州市中心医院口腔科,达州635000

出　　处：《生物医学工程学杂志》2013年第5期1039-1043,共5页Journal of Biomedical Engineering

基　　金：重庆市渝北区科学技术委员会资助项目(渝北财教2010年29号);重庆市卫生局科研资助项目(2011-2-192)

摘　　要：建立双侧尖牙垂直龈向异位3mm及双侧侧切牙水平腭向异位3mm的Typodont模型,分为MDD、MBT、自锁和Tip-Edge 4组,每组5副,共40副。45℃恒温水浴下用直径0.30mm镍钛圆丝排齐30min。ATOS流动光学三维扫描仪扫描水浴前、后模型获得三维数字图像。Geomagic软件将水浴前后数字图像重叠,通过色图分析得出尖牙各标志点垂直向、侧切牙各标志点水平向及矢状向移动变化数据,SAS 9.2统计软件对数据进行二因子方差分析。研究结果发现尖牙各标志点垂直向、侧切牙各标志点水平向及矢状向移动变化MDD组均小于其他3组(P<0.0001)。Typodont模型上牙齿位移大小直接与力量大小相关。研究结果初步提示排齐阶段MDD矫治器具有轻力矫治的特点,与其副槽沟的改良及单结扎翼设计有关。Typodont models of bilateral canines gingival displaced vertically for 3mm and bilateral lateral incisors pala- tal displaced horizontally for 3mm are made and every kind of the two kind models was divided into four groups： MDD, MBT, self-ligating and Tip-Edge. Each group of the two kinds of models had 5 models, so a total of 40 mod- els for the two kinds of models were set up. The experimental models were aligned with a 0.30ram of nickel titanium round wire in a water-bath with constant temperature 45~C for 30 minutes. The three-dimensional digital images of the experimental models before and after the water bath were obtained by scanning with the three dimensional optical scanner ATOS. Geomagic software was used to overlap the digital images taken before and after the water bath treat- ment. The vertical changes of sign points of canines, the movements of sign points of lateral incisors in the sagittal plane and the horizontal plane were quantified by using the Color map. The data was then processed by a two-factor analysis of variance by using SAS9.2 software package. Analysis of the results shows that the vertical changes of sign points of canines , the movements of sign points of lateral incisors in the sagittal plane and the horizontal plane of MDD group are all less than those in the other three groups, a statistically significant difference （P〈 0. 0001）. And the size of the teeth displacement is directly related to the size of orthodontic force on the typodont models.Thus the preliminary results suggest that MDD appliance might have advantages of light force in the alignment stage, and that the possible relevant factors are the improvement of its sub-slot and the single ligation wing design.

关 键 词：Typodont MDD矫治器 固定矫治器 排齐阶段 三维测量 

分 类 号：R783.5[医药卫生—口腔医学]