CO2 laser irradiation for debonding ceramic orthodontic brackets

Abstract This study evaluated shear bond strength (SBS), adhesive remnant index (ARI) and fracture mode of chemically mechanically retained ceramic brackets bonded with different composite resins irradiated CO2 laser. The null hypothesis was that laser would have similar SBS values. Ninety human premolars were divided into four experimental groups according to the combination type resin (Transbond XT Z 250) bracket (Fascination Mystique), two control (n=15). In groups, at 10 W for 3 seconds before testing. Enamel surface ARI calculated after debonding under electron microscopy scanning. ANOVA Mann-Whitney test used statistical analysis. had lower values than non-irradiated (control) (p<0.05). (Mystique) higher (p<0.05) Z250 irradiation. highest ARI. Adhesive fractures most prevalent. rejected. decreased efficiently facilitated brackets.