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Comparative Efficacy of Rotary Versus Ultrasonic Supplementary Protocols for Bioceramic and Epoxy Resin Sealer
Verónica-Méndez González1, Rodrigo Vargas López1, Amaury Pozos-Guillén1
1Endodontics Postgraduate Programme, Faculty of Dentistry, University of San Luis Potosí, San Luis Potosí, México.
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This study aimed to compare the efficacy of 2 retreatment protocols - SClean® file and R1 ClearSonic™ ultrasonic tip - in removing bioceramic (EndoSequence BC Sealer®, CeraSeal®, Kerr®) and epoxy resin-based (AH Plus®) sealers using micro‑CT analysis. One hundred and four extracted single-rooted teeth were divided into 8 groups according to sealer type and cleaning protocol. Residual sealer volume, surface area, and apical permeability were analysed using Mann-Whitney U and Kruskal-Wallis tests (α=0.05). No technique achieved complete removal, with the highest residue in the apical third. SClean® was more effective on bioceramic sealers (P < .05), while R1 ClearSonic™ showed no significant inter-sealer differences. Apical permeability recovery was greatest with bioceramic sealers, reaching 100% for EndoSequence BC Sealer®. In conclusion, bioceramic sealers are more easily eliminated than epoxy resin-based sealers, though complete removal - particularly apically - remains difficult.
