Final Endodontic Irrigation with 70% Ethanol Enhanced Calcium Hydroxide Removal from the Apical Third.

Autor:	Dias-Junior LCL; Department of Dentistry, Federal University of Santa Catarina, Florianópolis, Santa Catarina, Brazil., Castro RF; Department of Endodontics, School of Dentistry, Federal University of Pará, Belém, Pará, Brazil., Fernandes AD; Department of Endodontics, School of Dentistry, Federal University of Pará, Belém, Pará, Brazil., Guerreiro MYR; Department of Endodontics, School of Dentistry, Federal University of Pará, Belém, Pará, Brazil., Silva EJNL; Department of Endodontics, School of Dentistry, Grande Rio University, Rio de Janeiro, Rio de Janeiro, Brazil; Department of Endodontics, School of Dentistry, State University of Rio de Janeiro, Rio de Janeiro, Rio de Janeiro, Brazil. Electronic address: nogueiraemmanuel@hotmail.com., Brandão JMDS; Department of Endodontics, School of Dentistry, Federal University of Pará, Belém, Pará, Brazil.
Jazyk:	angličtina
Zdroj:	Journal of endodontics [J Endod] 2021 Jan; Vol. 47 (1), pp. 105-111. Date of Electronic Publication: 2020 Oct 09.
DOI:	10.1016/j.joen.2020.09.017
Abstrakt:	Introduction: The purpose of this study was to evaluate the cleanliness of root canal walls and dentinal tubules after attempting to remove the calcium hydroxide dressing with different irrigant solutions and the use of nonactivated irrigation or passive ultrasonic irrigation (PUI). Methods: After root canal instrumentation, 80 single-rooted teeth were filled with calcium hydroxide mixed with propylene glycol and 0.1% rhodamine B dye and inserted into canals with a Lentulo spiral. The calcium hydroxide dressing was initially removed with 10 mL saline solution and reinstrumentation with the master apical file. Then, the samples were randomly assigned into 8 experimental groups (n = 10) according to the irrigant solution with or without PUI: 2.5% sodium hypochlorite, 17% ethylenediaminetetraacetic acid + 1.25% sodium lauryl ether sulfate (EDTA-T), 37% phosphoric acid, or 70% ethanol. A final flush with 5 mL saline solution was performed. The percentage of clean root canal walls and the depth of clean dentinal tubules were measured with images of confocal laser scanning microscopy. The groups were compared using the 2-way analysis of variance test with the Bonferroni post hoc test for depth analysis and the Kruskal-Wallis with Dunn post hoc test for the perimeter analysis. Results: Irrigation with 70% ethanol presented a significantly higher percentage of clean root canal walls and a higher depth of clean dentinal tubules when compared with irrigation with 2.5% sodium hypochlorite and 17% EDTA-T for both irrigation methods (P < .05). No differences were observed between nonactivated irrigation or PUI protocols (P > .05). Conclusions: Seventy percent ethanol enhanced calcium hydroxide removal from the apical root third compared with 2.5% sodium hypochlorite or 17% EDTA-T. (Copyright © 2020 American Association of Endodontists. Published by Elsevier Inc. All rights reserved.)
Databáze:	MEDLINE
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