Influência erosiva do tucupi na resistência de união de interfaces adesivas preestabelecidas em esmalte e dentina

Abstract

This study evaluated the erosive influence of tucupi on the bond strength of pre-established adhesive interfaces to enamel and dentin. A total of 168 healthy bovine incisors were used, divided into 12 groups (n=14) according to the type of substrate (enamel or dentin), type of erosive cycling (distilled water, cola soft drink or tucupi), and type of adhesive strategy used (Etch&rinse and self-etch). The groups were: G1: enamel (ESM)+distilled water (H2O)+ Etch&rinse (ER); G2: dentin (DEN)+H2O+ER; G3:ESM+ cola soft drink (RBC) + ER; G4: DEN+RBC+ER; G5: ESM+tucupi (TUC)+ER; G6: DEN + TUC + ER; G7: ESM + H2O + self-etch (SE); G8: DEN + H2O + SE; G9: ESM + RBC + SE; G10: DEN +RBC+ SE; G11: ESM+TUC+SE; G12: DEN+TUC+SE. Cylinders of resin were made on enamel or dentin surfaces and, after 24 hours, the specimens were submitted to erosive cycling for 5 days. After 24 hours of the last cycle, a microshear test was performed. Analysis of fracture was performed using a stereoscopic magnifying glass. The results were submitted to two-way ANOVA, followed by Tukey's post-test, with results described as mean and standard deviation (α=5%). The groups exposed to tucupi showed significantly lower bond strength (p<0.05) in relation to the negative control groups (distilled water), and were statistically similar to the positive control groups (cola soft drink), both in enamel and dentin, for both adhesive strategies used. Therefore, it was possible to conclude that erosive cycling with tucupi influenced the bond strength of pre-established adhesive interfaces in enamel and dentin, regardless of the adhesive strategy.