Debris and friction of self-ligating and conventional orthodontic brackets after clinical use

摘要

Objective:? To compare the degree of debris and friction of conventional and self-ligating orthodontic brackets before and after clinical use. Materials and Methods:? Two sets of three conventional and self-ligating brackets were bonded from the first molar to the first premolar in eight individuals, for a total of 16 sets per type of brackets. A passive segment of 0.019 × 0.025-inch stainless steel archwire was inserted into each group of brackets. Frictional force and debris level were evaluated as received and after 8 weeks of intraoral exposure. Two-way analysis of variance and Wilcoxon signed-rank test were applied at P Results:? After the intraoral exposure, there was a significant increase of debris accumulation in both systems of brackets (P P P Conclusion:? Self-ligating and conventional brackets, when exposed to the intraoral environment, showed a significant increase in frictional force during the sliding mechanics. Debris accumulation was higher for the self-ligating system.