摘要
背景:临床正畸治疗已证明,将传统结扎转变为松结扎可缩短牙齿初期排齐时间,但有关不同NiTi弓丝配合松结扎技术与自锁托槽、传统结扎技术摩擦力差异的报道较少。目的:对比不同NiTi弓丝、不同入槽方式、不同种类托槽的滑动摩擦力,探讨不同矫治技术摩擦阻力的特点。方法:随机选择1例牙列中度拥挤病例石膏模型并做十字标记进行托槽定位,通过三维扫描及三维打印技术制作出完全相同的牙列模型,分别将不同托槽粘接在十字定位标记上,托槽有陶瓷自锁托槽(Damon Clear、Habit),金属自锁托槽(Damon 3MX、AO)、3M传统MBT直丝金属托槽和Habit传统四翼单晶体陶瓷托槽,每种托槽分别配以0.012英寸超弹NiTi丝(A)、0.014英寸超弹NiTi丝(B)、0.014英寸热激活NiTi丝(C)和0.014英寸Cu-NiTi丝(D),其中3M传统托槽、Habit传统托槽分别配合弓丝紧结扎和松结扎,使用微机伺服测力仪检测弓丝-托槽间的滑动摩擦力。结果与结论:(1)在3M传统托槽配合弓丝松结扎技术中,不同NiTi弓丝间的滑动摩擦力:A<C<B<D(P<0.01);在Habit传统托槽配合弓丝松结扎技术中,不同NiTi弓丝间的滑动摩擦力:C<A<B<D(P<0.01);(2)当使用A(或B)弓丝时,3M传统托槽-松结扎组的滑动摩擦力高于3MX自锁托槽组、AO自锁托槽组(P<0.01),低于3M传统托槽-传统结扎组(P<0.01);当使用C(或D)弓丝时,3M传统托槽-松结扎组的滑动摩擦力高于AO自锁托槽组(P<0.01),低于3M传统托槽-传统结扎组(P<0.01);(3)使用任一弓丝时,Habit传统托槽-松结扎组的滑动摩擦力高于Damon Clear自锁托槽组、Habit自锁托槽组(P<0.01),低于Habit传统托槽-传统结扎组(P<0.01);(4)结果表明松结扎技术可降低临床正畸治疗中普通托槽传统结扎的摩擦力,但与自锁托槽相比仍偏高,应配以小尺寸、低摩擦性能较高的弓丝。
BACKGROUND： Clinical evidence has proved that loose ligation can shorten the initial alignment time of the tooth compared with traditional ligation, but little is reported on the difference among loose ligation with NiTi archwires, self-ligation and traditional ligation. OBJECTIVE： To explore the frictional force of different orthodontic technologies by comparing the sliding frictional force of different ligations, brackets, and NiTi wires.METHODS： A plaster model with moderately crowded teeth was randomly and the bonding bracket was labeled using a cross mark. A corresponding dentition model was then copied by three-dimensional scanning and three-dimensional printing techniques. Different brackets, ceramic self-ligating brackets（Damon Clear, Habit）, metal self-ligating brackets（Damon 3MX, AO）, metal conventional bracket（3M） and ceramic conventional bracket（Habit） were bonded to the cross mark of the model. For each bracket, there were Ti Ni wires with four sizes, 0.012（A） and 0.014 inch（B） hyperelastic NiTi, 0.014 inch thermally activated NiTi（C）, and 0.014 inch Cu-NiTi（D）. Tight and loose ligations were performed using two conventional brackets, and the sliding frictional force between the wire and the bracket was detected using a microcomputer servo dynamometer. RESULTS AND CONCLUSION：（1） For the loose ligation using the 3M conventional bracket, the sliding frictional force of different NiTi was ranked as A〈C〈 B〈 D（P〈0.01）; for the loose ligation using the Habit conventional bracket, the sliding frictional force of different NiTi was ranked as C〈 A〈 B〈 D（P〈0.01）.（2） When using wire A or B, the sliding frictional force of 3M conventional bracket with loose ligation was higher than that of 3M self-ligating bracket and AO self-ligating bracket（P〈0.01） and was lower than that of 3M convention bracket with tight ligation（P〈0.01）. When using wire C or D, the sliding frictional force of 3M conventional bracket with loose ligation was higher than that of AO self-ligating bracket（P〈0.01）, but lower than that of 3M conventional bracket with tight ligation（P〈0.01）.（3） When using any wire, the sliding frictional force of Habit conventional bracket with loose ligation was higher than that of Damon Clear self-ligating bracket and Habit self-ligating bracket（P〈0.01）, and lower than that of Habit conventional bracket with tight ligation（P〈0.01）. These experimental results reveal that loose ligation can reduce the frictional force of conventional brackets compared to traditional ligation, but it is still inferior to self-ligating brackets. Therefore, small-size and low-friction wires are recommended to further reduce the frictional force.
作者
马啸宙
李洪发
赵艳红
武杰
张明灿
赵伟
Ma Xiao-zhou;Li Hong-fa;Zhao Yan-hong;Wu Jie;Zhang Ming-can;Zhao Wei(Department of Orthodontics,Stomatological Hospital of Tianjin Medical University,Tianjin 300070,China;Stomatological Hospital of Tanggu,Tianjin 300450,China)
出处
《中国组织工程研究》
CAS
北大核心
2018年第22期3491-3497,共7页
Chinese Journal of Tissue Engineering Research
基金
天津市滨海新区卫生局科技项目资助(2013Bwky023)
天津医科大学口腔医院科研基金(2014YKYQ02)~~
