Resumo

DZIEDZIC, Dilcele Silva Moreira; PROHNY, João Paulo Stanislovicz; PICHARSKI, Gledson Luiz  e  FURUSE, Adilson Yoshio. Influence of curing protocols on water sorption and solubility of a self-adhesive resin-cement. Braz. J. Oral Sci. [online]. 2016, vol.15, n.2, pp. 144-150. ISSN 1677-3225.

Aim: To evaluate the effect of different activation protocols on the polymerization of a self-adhesive dual cured resin-based cement. Methods: Thirty disc-shaped specimens were prepared with the resin cement RelyX U200 (3M ESPE) and divided according to three protocols: immediate light-activation for 40 s, delayed light-activation (10 min after manipulation, for 40 s) or self-curing without light-activation. The specimens were desiccated, kept in water at 37 °C for 7 days and desiccated again to calculate water sorption, solubility and mass variation. Data were analyzed by Shapiro-Wilk Test and Wilcoxon tests (α=0.05). Images after the specimens' final desiccation were also made. Results: The Wilcoxon test revealed a significant difference for sorption and mass variation (p<0.05) and the highest value was observed in self-curing or chemical activation group (CA), followed by delayed light-activation (DL) and immediate light-activation (IL). Besides the water sorption parameters, there were also microvoids on the discs from the delayed and no light-activation groups. Conclusion: The light-activation immediately after manipulation is recommended for the evaluated resin cement.

Palavras-chave : Resin Cements.; Solubility.; Polymerization..