Gomes Torres, Carlos Rocha [UNESP]Ferraz Caneppele, Taciana Marco [UNESP]Quirino Sanches, Tatiane Caldas [UNESP]Ribeiro, Carolina Ferraz [UNESP]Borges, Alessandra Buhler [UNESP]2014-12-032014-12-032014-07-03Journal Of Adhesion. Abingdon: Taylor & Francis Ltd, v. 90, n. 7, p. 585-595, 2014.0021-8464http://hdl.handle.net/11449/112982The objective of this study was to evaluate the effect of surface treatment with Er:YAG and Nd:YAG lasers on resin composite bond strength to recently bleached dentin. A total of 120 bovine incisors were distributed into two groups: C- without bleaching; and B- bleached with 35% hydrogen peroxide. Each group was divided into three subgroups: N- without laser treatment; Nd- Nd:YAG laser irradiation; and Er- Er:YAG laser irradiation. The adhesive system (Adper Single Bond 2) was applied and composite build-ups were constructed with Filtek Supreme (3M/ESPE). The teeth were sectioned to obtain dentin-resin sticks (1x1mm(2)) and tested by microtensile bond testing. The bond strength values in group B, subgroup N (16.1 +/- 3.5MPa) presented no significant difference compared with group B, subgroup Er (14.7 +/- 6.1MPa). Group C, subgroup N (26.8 +/- 7.4MPa) presented no significant difference compared with group B, subgroup Nd (28.8 +/- 5.6MPa). Group C, subgroup Nd (36.1 +/- 7.9MPa) presented a significant increase in bond strength compared with the other groups. The Er:YAG laser did not influence the bond strength of bleached specimens, and the use of the Nd:YAG laser on bleached specimens was able to reverse the immediate effects of bleaching, obtaining bond strength values similar to those of the control group.585-595engCompositesFracture mechanismsDentistryAdhesion by mechanical interlockingArtigo10.1080/00218464.2013.812036WOS:000334040400002Acesso restrito31353678496099386960470053037905