Twenty-five human canines restored at the coronal level with photoactivated composite resin after endodontic procedures were evaluated for the following factors: a) resin tags formation, uniformity and amount, while varying the application method; b) acid etch and dentin adhesives importance on restored surfaces. Through qualitative evaluation by 3 examiners of photomicrographs obtained by SEM, it was observed that resin tag formation with best uniformity was found in the group where the bond was applied by cotton pellets with the immediate placement of the composite resin, being both materials polymerized together. Greater amount of tags was found in the group where the bond was homogenized with air spray. The absence of acid etch or the lack of application of the dentin adhesion system can hinder the formation of resin tags.
Dental restoration; Acid etching; Composite resins
