Effect of Dental Surface Treatment with Nd:YAG and Er:YAG Lasers on Bond Strength to Recently Bleached Dentin
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Data
2014-07-03
Autores
Gomes Torres, Carlos Rocha [UNESP]
Ferraz Caneppele, Taciana Marco [UNESP]
Quirino Sanches, Tatiane Caldas [UNESP]
Ribeiro, Carolina Ferraz [UNESP]
Borges, Alessandra Buhler [UNESP]
Título da Revista
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Editor
Taylor & Francis Ltd
Resumo
The 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.
Descrição
Palavras-chave
Composites, Fracture mechanisms, Dentistry, Adhesion by mechanical interlocking
Como citar
Journal Of Adhesion. Abingdon: Taylor & Francis Ltd, v. 90, n. 7, p. 585-595, 2014.