Abstract

To evaluate the effects of removal protocols of bioceramic sealer residues (BioLine Sealer Z and BioRoot RCS) using glycine or glass microparticle abrasion on the adhesive interface with a universal adhesive system used in self-etch mode. Sixty bovine dentin specimens were treated with the bioceramic sealers and allocated according to the removal protocols (n = 20): control (distilled water), glycine air-abrasion, or glass microparticle abrasion. Persistence of residues under scanning electron microscopy (500 x ), microshear bond strength, adhesive failure mode, and adhesive interface under confocal laser scanning microscopy (1024 x ) were assessed. Residue persistence and adhesive interface data were analyzed using Kruskal-Wallis/Dunn and microshear bond strength test by two-way ANOVA/Tukey tests (alpha = 0.05). Glass microparticle abrasion resulted in significantly higher residue persistence, lower bond strength, and a greater incidence of adhesive failures (P < 0.05). Glycine air-abrasion and control groups exhibited lower residue levels, higher bond strength values, and a predominance of cohesive failures (P > 0.05). Glass microparticle abrasion compromises bond strength and the quality of the adhesive interface, leaving substantial residues regardless of the bioceramic sealer tested.