Resistência de união à microtração de sistemas adesivos “condiciona-e-lava” de dois passos: efeito de diferentes tratamentos da superfície dentinária condicionada

AbstractIntroduction: The development of adhesive systems allow manufacturers to develop materials with increasingly simplified techniques, but that still would promote adequate resistance values of immediate union. It is suggested that some treatments of dentin surface can facilitate the process of accession. Objective: To evaluate the effects of different treatments in conditioned flat dentin surface on bond strength to microtensile 2-step etch-and-rinse adhesive systems. Material and method: Ninety-six human third molars were divided into twelve groups (n = 8) randomly according to the used adhesive system (GI: Single Bond 2 - 3M ESPE; GII: Prime & Bond 2.1 - Dentsply; GIII: Excite - Ivoclar Vivadent) and type of treatment of the conditioned dentin (a: water; b: water + chlorhexidine; c: ethanol; d: chlorhexidine + ethanol). All teeth were restored with Charisma color A2 (Heraeus – Kulzer, Germany) and subjected to mechanical testing microtensile (EMIC DL-2000). The statistical test performed was ANOVA 1 factor supplemented with Tukey test.