FAS自锁托槽与传统自锁托槽的摩擦力对比研究  

Comparison study of friction of FAS self-ligating bracket and traditional self-ligating bracket

作　　者：朱鲲[1] 王春玲[1] 王娟 赵艳红[1] 

机构地区：[1]山东大学口腔医院正畸科,山东济南250012 [2]青岛市口腔医院正畸科,山东青岛266003

出　　处：《华西口腔医学杂志》2007年第4期371-374,共4页West China Journal of Stomatology

摘　　要：目的测量FAS托槽在两种不同调节状态下与正畸钢丝之间的摩擦力大小,并与DamonⅢ和SPEED两种传统自锁托槽进行对比。方法制作尺寸放大20倍的FAS、DamonⅢ和SPEED托槽钢制模型,同时制作放大20倍的钢制圆丝和方丝,采用拉力传感器测量托槽与弓丝间摩擦力的大小。实验中FAS托槽分为两种调节状态:垫片完全收入和与弓丝平面无压力状态相切后旋转0.5圈。结果在垫片完全收入的状态下,FAS托槽与直径8.1280mm的不锈钢圆丝之间的动静摩擦力与DamonⅢ和SPEED托槽均无统计学差异(P>0.05);在使用9.1440mm×12.7000mm不锈钢方丝时,FAS托槽与方丝之间的动静摩擦力与DamonⅢ托槽无统计学差异(P>0.05),而低于SPEED托槽,且有统计学差异(P<0.05)。当垫片与弓丝平面无压力状态相切后旋转0.5圈时,FAS托槽与圆丝、方丝的动、静摩擦力均明显高于DamonⅢ和SPEED托槽(P<0.01)。结论FAS托槽可以有效调节摩擦力的大小,在无压力状态下,托槽与弓丝间的摩擦力与DamonⅢ托槽相似;在有压力状态下,可以有效锁定弓丝,防止弓丝滑动。Objective To measure the frictions between FAS bracket and stainless steel wire under different two conditions, and compare two traditional self-ligating brackets. Methods FAS bracket was a new-style self-ligating bracket with a friction adjusting system （FAS） to adjust the friction as the wires slide in the bracket. Firstly, FAS bracket 20 times of original size was made, then the frictions were measured respectively made by the steel round wires of diameters 8.128 0 mm or the steel square wires in size of 9.144 0 mm×12.700 0 mm. It was divided into two adjusting states, and used the same method to measure Damon Ⅲ and SPEED bracket in 20 times of original size. Results With the shim entirely drew in, all the frictions of the arch wire had no significant difference with the Damonm. When 8.128 0mm stainless steel round wire was used, SPEED bracket had no significant difference with FAS. When 9.144 0 mm×12.700 0 mm square wire was used, they bad significant difference （P〈0.05）. On turning half a circle, all the frictions of the arch wire had significant difference with two tradition bracket （P〈0.01）. Conclusion The new-style FAS bracket can adjust the friction efficiently. Under no pressure state, the friction force is similar to Damonm. Under pressure state, FAS bracket locks the wires, and provides the sliding of wires.

关 键 词：自锁托槽 摩擦力 摩擦力调节系统 

分 类 号：R783.5[医药卫生—口腔医学]