DOI: 10.36347/sjds.2019.v06i11.004

Pages: 493-497

Objective: Verify if the use of MAS in ER mode could compromise bonding effectiveness compared to its previous version, the etch-and-rinse adhesive system (EAS). Materials and Methods: Twenty human molars were divided into 2 groups (N=10) to the adhesive system used, the MAS - Scotchbond Universal Adhesive (3M ESPE) and the 2-step EAS - Adper Single Bond 2 (3M ESPE). The crown of each tooth was sectioned into halvesand the mesial/distal surfaces were used. The investigated adhesive agents were applied according to manufacturer’s instructions. Resin composite cylinders were built after adhesive application. After stored for 24 hours and six months in 37°C distilled water, the specimens were subjected to microshear test in universal testing a machine at a crosshead speed of 0.5 mm/minute. The results were analyzed with one-way ANOVA and the Tukey test. Results: The two adhesive systems investigatedproduced produced similar values of bond strength to enamel regardless of the storage conditions. After 6 months of storage, both adhesive systems did not show significant reduction of bond strength when compared to the initial bond strength (p <0.05). Conclusions: The application of the multimode adhesive system in the etch-and-rinse technique, on acid-demineralized enamel surface did not influence the behavior of the adhesive. Clinical Significance: This study shows the importance to present another viable option adhesive system, with fewer steps, optimizing the dentist's work.