Bond strength of Resilon/Epiphany compared with Gutta-percha and sealers Sealer 26 and Endo Fill

This study evaluated the bond strength of Epiphany (R)/Resilon (R) to radicular dentine and compared this with that of Gutta-percha sealed with Sealer 26 and also Endo Fill (R). Fifteen human single-rooted extracted teeth had their root canals enlarged to a standardised internal root diameter of 1.5 mm. The teeth were filled with: Group I Epiphany (R)/Resilon (R) cones, Group II Sealer 26 (R)/Gutta-percha cones and Group III Endo Fill (R)/Gutta-percha cones. Three 2 mm-thick cross-sections were obtained from each tooth (n = 15) and subjected to a push-out test (1 mm min-1). The means (MPa) were compared using anova /NewmanKeuls tests. There were no statistically significant differences between Group I and Group II (P > 0.01). Both bond strengths were significantly higher than that of Group III (P < 0.01). The root canal filling system Epiphany (R)/Resilon (R) showed bond strength similar to that of Sealer 26 (R)/Gutta-percha. Both were higher than that of Endo Fill (R)/Gutta-percha.381212

Evaluation of the colour change in enamel and dentine promoted by the interaction between 2% chlorhexidine and auxiliary chemical solutions

To evaluate the colour change in enamel and dentine, promoted by interaction of 2% chlorhexidine gluconate (CHX) with 5.25% sodium hypochlorite (NaOCl) and 17% ethylenediaminetetraacetic acid (EDTA). Fragments containing enamel and dentine were obtained from the crowns of extracted bovine incisors. Before and after immersion of the samples in the substances, they were evaluated with reference to the colour of the enamel and dentine. The values obtained in numerical scores were subjected to statistical analysis using Wilcoxon test. A colour change in the enamel and dentine in groups treated with CHX gel+NaOCl and CHX gel+NaOCl+EDTA, and a change in colour only in the dentine in groups treated with CHX solution+NaOCl and CHX solution+NaOCl+EDTA. When used prior to NaOCl, CHX has the ability to induce a colour change in dental structures.39310711