Department of Orthodontics, University of Toronto, Canada.
Angle Orthod. 2011 Nov;81(6):1036-44. doi: 10.2319/122810-751.1. Epub 2011 Jun 23.
To elucidate some of the parameters determining the frictional behavior of passive, active, and interactive self-ligating brackets during sliding mechanics.
A custom jig mimicking the three-dimensional tooth movements that occur during sliding mechanics and an Instron testing machine were used to determine the resistance to sliding of six different self-ligating brackets (SPEED, In-Ovation C, CarrièreSLB, ClaritySL, SmartClip, VisionLP). Each bracket was tested on three rectangular stainless steel wires: 0.017 × 0.022 inch, 0.017 × 0.025 inch, and 0.019 × 0.025 inch. A two-way balanced analysis of variance was used for statistical analysis.
The four passive self-ligating brackets (CarrièreSLB, ClaritySL, SmartClip, VisionLP) displayed significantly lower frictional resistance (P < .001) than the remaining brackets, which featured an active (SPEED) or interactive (In-Ovation C) clip. The SPEED bracket consistently demonstrated the highest resistance to sliding.
The mode of self-ligation appears to be the primary variable in determining the frictional behavior of orthodontic brackets undergoing sliding mechanics. Passive self-ligating brackets demonstrated significantly lower frictional resistance to sliding. With regard to the resistance of active self-ligating brackets, the depth (buccolingual thickness) of the wire had a more significant influence than its height.
阐明一些决定被动、主动和交互自锁托槽在滑动力学中摩擦行为的参数。
使用一个模仿滑动力学中发生的三维牙齿运动的定制夹具和英斯特朗试验机来确定六个不同自锁托槽（SPEED、In-Ovation C、CarrièreSLB、ClaritySL、SmartClip、VisionLP）的滑动阻力。每个托槽在三根矩形不锈钢丝上进行测试：0.017×0.022 英寸、0.017×0.025 英寸和 0.019×0.025 英寸。使用双向平衡方差分析进行统计分析。
四个被动自锁托槽（CarrièreSLB、ClaritySL、SmartClip、VisionLP）的摩擦阻力明显低于其余带有主动（SPEED）或交互（In-Ovation C）夹的托槽（P<.001）。SPEED 托槽始终表现出最高的滑动阻力。
自结扎方式似乎是决定滑动力学中正畸托槽摩擦行为的主要变量。被动自锁托槽的滑动阻力明显较低。关于主动自锁托槽的阻力，线的深度（颊舌厚度）比其高度对阻力的影响更大。
