MDD矫治器与常见固定矫治器在牙齿排齐初期阶段的摩擦力比较  

Comparative Study of Frictional Force among MDD Appliance and Common Fixed Appliances during the Initial Leveling Stage

作　　者：李晓倩[1,2] 吴鹏[3] 宋锦璘[1,2] 何平[4] 邓锋[1,2] 高翔[1,2] 

机构地区：[1]重庆医科大学附属口腔医院正畸科,重庆401147 [2]重庆市口腔疾病与生物医学研究中心 [3]山东省新汶矿业集团莱芜中心医院口腔科 [4]四川省达州市中心医院口腔科

出　　处：《口腔医学研究》2013年第3期273-276,共4页Journal of Oral Science Research

基　　金：重庆市卫生局科研项目(2011-2-192);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)

摘　　要：目的:比较并探讨MDD矫治器与几种常见固定矫治器在前牙排齐初期阶段的摩擦力状况。方法:建立双侧尖牙龈向垂直异位3mm的Typodont模型,分MDD、MBT、自锁和Tip-Edge 4组。0.012英寸镍钛圆丝作为排齐弓丝,利用万能材料试验机对各模型进行水浴前后的摩擦力测试,记录最大静摩擦力和动摩擦力。结果:水浴前动、静摩擦力大小顺序:MBT>Tip-Edge>MDD>自锁,两两比较均有统计学差异;水浴后动、静摩擦力降低率:自锁矫治器最高,MDD矫治器最低,Tip-Edge与MBT组比较无统计学差异,其余各组均有统计学差异。结论:MDD矫治器在牙齿排齐阶段摩擦力较低,具有轻力矫治的优点,其副槽沟的设计是摩擦力降低的关键。Objective： To compare the frictional force of MDD appliance with other common fixed-appliances during the initial leveling stage. Methods： Typodont models of canines displaced 3mm vertically were made and divided into MBT, self -ligating, Tip-Edge and MDD group . 0. 012 inches of NITI wire was served as alignment wire. The universal material test machine was used to test the frictional force of each model before and after the water showering. The biggest kinetic and static frictional force were recorded. Results： The sequence of kinetic and static frictional forces prior to the water showering was.. MBT 〉Tip--Edge〉MDD〉 self-ligating,which had statistical discrepancy. After the water showering, self-ligating appliance had the highest reduction rate of kinetic and static frictional force while MDD had the lowest . The rest groups had statistical discrepancy when comparing with each other except Tip-Edge and MBT group. Conclusion.. MDD appliance could apply with slight force which benefit from the sub-slot.

关 键 词：MDD矫治器 固定矫治器Typodont摩擦力 

分 类 号：R783.5[医药卫生—口腔医学]