Abstract
Introduction
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.
Result
GIIc groups GIIIc and GIId showed statistically significant increase in bond strength to immediate microtensile.
Conclusion
The different treatments of dentin did not affect negatively the bond strength for all tested adhesive systems and the use of the technique with ethanol, with or without chlorhexidine, appears to be an interesting approach when combined with 2-step etch-and-rinse adhesive systems.
Descriptors:
Adhesives; dentin; chlorhexidine; ethanol; bond strength
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