Aims. To measure the friction force generated during sliding mechanics with conventional, self-ligating (Damon 3 mx, Smart Clip, and Time 3) and low-friction (Synergy) brackets using different archwire diameters and ligating systems in the presence of apical and buccal malalignments of the canine. Methods. An experimental setup reproducing the right buccal segment of the maxillary arch was designed to measure the friction force generated at the bracket/wire and wire/ligature interfaces of different brackets. A complete factorial plan was drawn up and a three-way analysis of variance (ANOVA) was carried out to investigate whether the following factors affect the values of friction force: (i) degree of malalignment, (ii) diameter of the orthodontic wire, and (iii) bracket/ligature combination. Tukey post hoc test was also conducted to evaluate any statistically significant differences between the bracket/ligature combinations analyzed. Results. ANOVA showed that all the above factors affect the friction force values. The friction force released during sliding mechanics with conventional brackets is about 5-6times higher than that released with the other investigated brackets. A quasilinear increase of the frictional forces was observed for increasing amounts of apical and buccal malalignments. Conclusion. The Synergy bracket with silicone ligature placed around the inner tie-wings appears to yield the best performance.
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机译：目的使用不同的弓丝直径和结扎系统，在存在根尖和颊侧错位的情况下，使用传统的自绑扎（Damon 3 mx，Smart Clip和Time 3）和低摩擦（Synergy）托槽测量滑动力学过程中产生的摩擦力犬。方法。设计了一个再现上颌弓右颊段的实验装置，以测量在不同支架的支架/金属丝和金属丝/结扎界面处产生的摩擦力。制定了完整的析因计划，并进行了三方差分析（ANOVA），以调查以下因素是否影响摩擦力的值：（i）畸形程度，（ii）正畸线的直径， （iii）方括号/连字组合。还进行了Tukey post hoc测试，以评估所分析的括号/连字组合之间的任何统计学上的显着差异。结果。方差分析表明上述所有因素都会影响摩擦力值。使用传统支架的滑动力学过程中释放的摩擦力比使用其他研究支架释放的摩擦力高约5-6倍。观察到摩擦力的准线性增加是由于根尖和颊侧畸形的数量增加。结论。内绑翼周围带有有机硅绑带的Synergy支架看来表现出最佳性能。
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