Effect of final irrigation protocols on push-out bond strength of an epoxy resin root canal sealer to dentin.

Autor: Leal F; Department of Endodontics, UERJ - State University of Rio de Janeiro, Rio de Janeiro, Brazil., Simão RA; Department of Metallurgic and Materials Engineering, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil., Fidel SR; Department of Endodontics, UERJ - State University of Rio de Janeiro, Rio de Janeiro, Brazil., Fidel RA; Department of Endodontics, UERJ - State University of Rio de Janeiro, Rio de Janeiro, Brazil., do Prado M; Department of Metallurgic and Materials Engineering, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.
Jazyk: angličtina
Zdroj: Australian endodontic journal : the journal of the Australian Society of Endodontology Inc [Aust Endod J] 2015 Dec; Vol. 41 (3), pp. 135-9. Date of Electronic Publication: 2015 May 06.
DOI: 10.1111/aej.12114
Abstrakt: The purpose of the present study was to evaluate the effect of different final irrigation protocols on push-out bond strength of an epoxy resin root canal sealer to dentin. Eighty single-rooted anterior teeth were used. The root canals were partially prepared using a rotary system and the final diameter was standardised using a #5 Gates-Glidden drill prior to the push-out bond test. During chemomechanical preparation, 5.25% NaOCl or 2% CHX gel was used. For smear layer removal, 17% ethylenediaminetetraacetic acid (EDTA) or QMix 2 in 1 was applied for 3 min. As final irrigant, 1 mL of NaOCl, CHX solution or distilled water was used. On conclusion of preparation, canals were filled with gutta-percha/AH Plus sealer. Bond strength was measured by the push-out test. Data were statistically analysed by Kruskal-Wallis and Mann-Whitney U-tests. The group NaOCl/EDTA/NaOCl showed significantly higher bond strength values than other groups. In all groups, there were mainly mixed failure patterns. It can be concluded that 5.25% NaOCl proved to be the best solution for the final irrigation when combined with EDTA. The final irrigation protocols affect the push-out bond strength of AH Plus to dentin.
(© 2015 Australian Society of Endodontology.)
Databáze: MEDLINE
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