Jones Steven P, Ben Bihi Saida
Unit of Orthodontics, UCL Eastman Dental Institute for Oral Health Care Sciences, London, UK.
Aust Orthod J. 2009 Nov;25(2):136-41.
This ex-vivo study compared the static frictional resistance of a low-friction ligation system against a conventional elastomeric module, and studied the effect of storage in a simulated oral environment on the static frictional resistance of both ligation systems.
Eighty stainless steel brackets were tested by sliding along straight lengths of 0.018 inch round and 0.019 x 0.025 inch rectangular stainless steel wires ligated with either conventional elastomerics or the Slide system (Leone, Florence, Italy). During the tests the brackets and wires were lubricated with artificial saliva. A specially constructed jig assembly was used to hold the bracket and archwire securely. The jig was clamped in an Instron universal load testing machine. Crosshead speed was controlled via a microcomputer connected to the Instron machine. The static frictional forces at 0 degree bracket/wire angulation were measured for both systems, fresh from the pack and after storage in artificial saliva at 37 degrees C for 24 hours.
The results of this investigation demonstrated that the Slide ligatures produced significantly lower static frictional resistance than conventional elastomeric modules in the fresh condition and after 24 hours of storage in a simulated oral environment (p < 0.001). Storage for 24 hours in artificial saliva had no effect on the static frictional resistance of conventional elastomeric modules and the Slide system (p = 0.525).
The claim by the manufacturer that the Slide system produces lower frictional resistance than conventional elastomeric modules is upheld.
本体外研究比较了低摩擦结扎系统与传统弹性模块的静摩擦阻力，并研究了在模拟口腔环境中储存对两种结扎系统静摩擦阻力的影响。
八十个不锈钢托槽通过沿着0.018英寸圆形和0.019×0.025英寸矩形不锈钢丝的直线段滑动进行测试，这些钢丝分别用传统弹性体或Slide系统（意大利佛罗伦萨的Leone公司）结扎。在测试过程中，托槽和钢丝用人造唾液润滑。使用专门构建的夹具组件牢固地固定托槽和弓丝。夹具夹在Instron万能材料试验机中。通过连接到Instron机器的微型计算机控制十字头速度。测量了两种系统在托槽/钢丝成角0度时的静摩擦力，一次是刚从包装中取出时，另一次是在37℃的人造唾液中储存24小时后。
本研究结果表明，在新鲜状态下以及在模拟口腔环境中储存24小时后，Slide结扎产生的静摩擦阻力明显低于传统弹性模块（p < 0.001）。在人造唾液中储存24小时对传统弹性模块和Slide系统的静摩擦阻力没有影响（p = 0.525）。
制造商关于Slide系统产生的摩擦阻力低于传统弹性模块的说法得到了支持。
