Degree of conversion of a self-adhesive endodontic sealer when used as bulk material

Abstract

This study tested the null hypothesis that the opacity of RealSeal SE (RSSE) sealer makes light-curing inefficient, while the degree of conversion (DC) is similar regardless of curing method. Fourteen uniradicular teeth were sectioned at 15 mm from the apex. Root canals were instrumented using the Reciproc file system, bulk-filled with RSSE, and divided randomly into two groups (dual-cure or self-cure). DC was determined by micro-Raman spectroscopy at 24 h, 48 h, and 1 week after filling, at 6, 9, and 12 mm from the coronal end. Contrast ratio (Yb/ Yw) was used to determine the opacity of the material. Descriptive statistics and nonparametric tests were used, and significance was defined as a P value of less than 0.05. Opacity was almost total by the first section, at 6 mm. In dual-cure mode, DC values at 24 h were lower in the apical section (63.8%) than in the more coronal sections and were lower than in selfcured specimens (87.4%). Light-curing of the coronal end did not improve DC. These differences remained at 48 h and 1 week. Only a small (2%) but significant increase in DC was observed in evaluations at 24 h and 1 week. (J Oral Sci 58, 333-338, 2016)

Comparative Evaluation of the Apical Sealability of AH Plus and RealSeal SE Using 5.25% Sodium Hypochlorite with 17% EDTA and 10% Citric Acid as Irrigants—An In Vitro Study

“…[ 19 ] In the case of RealSeal SE, light curing was applied for 40 seconds using a standard light-curing unit in accordance with the manufacturer’s instructions. [ 20 ]…”

Effect of using calcium-silicate and silicone based root canal sealers in bulk or with main core material on bond strength

“…When the literature is examined, it is seen that there are few studies evaluating the bond strength of root canals filled with the bulk technique; as far as we know, there is no study on the effects of using GuttaFlow Bioseal root canal sealer with the bulk technique on bond strength. 6,[11][12][13] Therefore, this study aimed to assess the push-out bond strengths of calcium silicate and siliconebased root canal sealers in bulk or with gutta-percha. The null hypotheses tested were: (i) the presence or absence of core material has no effect on push-out bond strength; (ii) there is no difference in push-out bond strength between calcium silicate-and silicone-based sealers tested.…”