Degree of conversion of a methacrylate-based endodontic sealer: a micro-Raman spectroscopic study

Journal of Endodontics
Wan-Cui WuJian Chen

Abstract

Recently, a methacrylate-based obturation system, Resilon/RealSeal SE, has been developed to replace gutta-percha and traditional sealers. As a resin-based material, degree of conversion (DC) is one of the most important characteristics. The aim of this study was to investigate the time-dependent change of DC of RealSeal SE as well as the influence of canal moisture and root canal depth on it. DC of RealSeal SE, either self-cured or dual-cured (n = 8 in each group), was calculated according to the Raman spectra obtained at different times after mixing. Thirty extracted teeth with single canal were instrumented and divided randomly into 2 groups in terms of different canal drying methods. In the ethanol group, excess distilled water in root canal was removed with paper points followed by 95% ethanol. In the paper points group, root canals were blot-dried with paper points until the last one appeared dry. DC of RealSeal SE was calculated from serial cross sections (2, 5, and 8 mm from the apex) obtained 1 week after obturation with Resilon/RealSeal SE. Significant increase in DC of RealSeal SE was observed in 1 week (P < .01), with little change afterwards (P > .05). DC of sealer in ethanol group was significantly higher than in ...Continue Reading

Citations

Apr 17, 2012·International Journal of Dentistry·Derek DugganEric Simmons
Apr 21, 2012·Journal of Endodontics·Kirsten L Van LanduytFranz X Reichl
Apr 17, 2012·Microscopy Research and Technique·Gisele Aihara HaragushikuRicardo Gariba Silva
Jul 30, 2014·Journal of Endodontics·Johanna Cuadros-SanchezAlessandro D Loguercio
Sep 27, 2016·Journal of Oral Science·Silvia C Pérez-GonzálezSantiago González-López
Aug 14, 2018·Journal of Oral Science·Indre GraunaiteVita Machiulskiene

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