The effect of air abrasion in enamel adhesion of orthodontic bracket

Carla D’Agostini DERECH, Juliana da Silva PEREIRA, Margareth Maria Gomes de SOUZA

Aim: The purpose of this study in vitro was to evaluate the effect of the air abrasion with Al-oxide in the adhesion of orthodontic brackets and compare with traditional technique of acid conditioning of the enamel. Methods: Eighty bovine teeth distributed randomly between four groups had been used and the surface of the enamel was prepared in the following way: group 1 (only air abrasion), group 2 (enamel pumiced and acid conditioning), group 3 (air abrasion and acid conditioning) and group 4 (only acid conditioning). After, adhesive system was applied and bracket was bonded with resin. Shear bond was assessed and analysis of the IAR was performed. Test of multiple variance (ANOVA) and the comparison between pairs had been applied (Tukey) on the results. For the analysis of the IAR the Qui-square test was applied. Results: Group 1 presented the lowest shear strength (3,6MPa) and 3 the greater (13,27MPa). The Quisquare analysis of the IAR demonstrated that the treatment of the enamel surface has influence on the amount of resin remainder on the enamel and groups 3 and 4 had presented the biggest amount of adhered resin. Conclusions: The air abrasion doesn’t have to be the only procedure used in the preparation of the enamel surface in the brackets bonding, however, when associated to the acid conditioning it revealed efficient in adhesion increase. New studies are necessary aiming at lesser damage of the enamel and satisfactory adhesion.

Keywords: Air abrasion. Acid conditioning. Adhesion. Bonding.

Saturday, December 28, 2024 23:50