Efeito da água ozonizada na resistência de união à dentina

Abstract

The clinical longevity of adhesive restorations depends primarily on complete removal of the infected structure and obtaining a marginal seal to prevent microleakage. Only the mechanical cleaning of the cavity is usually not sufficient for the total elimination of microorganisms, which remain in the cavity after the physical removal of caries, and therefore the use of antimicrobial agents is indicated. Ozone appears as an alternative antimicrobial substance due to its strong oxidizing activity. However, it still raises questions about its influence on the adhesive procedure. The aim of this study was to evaluate the effect of the application of ozonated water on the immediate bond strength to human dentin of a two - step adhesive system (Single Bond 2), through the microtensile test. In this quantitative in vitro laboratory study, 12 teeth were prepared in two different cavity disinfection protocols. They were randomly divided into two groups (n = 6), obtaining at least 7 sticks per tooth. Data were considered by the ANOVA test (p <0.05). The individual comparisons were performed with Tukey's Difference Test (HSD) (p <0.05). The results revealed that there was a statistical difference between groups 1 (distilled water) and 2 (ozonated water). Microscopic analysis showed that the predominant failure mode was adhesive. The application of ozonated water increased the bond strength of the resin to human dentin.