RESUMO

Dentinal surfaces prepared with an Er:YAG laser have distinctly different characteristics compared to those prepared with conventional instruments. The objective of this study was to evaluate the shear bond strength of a total-etch adhesive system and a self-etch adhesive system to dentin, prepared conventionally or with an Er:YAG laser. Specimens that were prepared with a diamond bur and treated with the total-etch adhesive showed the highest mean bond strength, followed by specimens prepared with the laser and treated with the total-etch adhesive, specimens prepared with a diamond bur and treated with the self-etch adhesive, and specimens prepared with the laser and treated with the self-etch adhesive, but there were no differences among the groups (P > 0.05). These data indicate that the tested adhesive systems promote similar shear bond strengths, whether the dentin is prepared with a diamond bur or an Er:YAG laser, and that an Er:YAG laser is a suitable cavity preparation method that promotes an adequate surface for a posterior adhesive procedure.

Assuntos

Colagem Dentária , Adesivos Dentinários/química , Dentina/efeitos da radiação , Lasers de Estado Sólido , Condicionamento Ácido do Dente/métodos , Compostos Inorgânicos de Carbono/química , Resinas Compostas/química , Materiais Dentários/química , Análise do Estresse Dentário/instrumentação , Diamante/química , Etanol/química , Humanos , Teste de Materiais , Metacrilatos/química , Fosfatos/química , Ácidos Fosfóricos/química , Cimentos de Resina/química , Resistência ao Cisalhamento , Compostos de Silício/química , Estresse Mecânico , Temperatura , Fatores de Tempo , Preparo do Dente/instrumentação , Preparo do Dente/métodos , Água/química