Volume 81, Issue 8 p. 914-920
RESEARCH ARTICLE

Effect of the calcium silicate-based sealer removal protocols and time-point of acid etching on the dentin adhesive interface

Jéssika Mayhara Pereira Morais

Jéssika Mayhara Pereira Morais

Department of Restorative Dentistry, Araraquara Dental School, Univ Estadual Paulista (UNESP), Araraquara, Brazil

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Keli Regina Victorino

Keli Regina Victorino

Department of Restorative Dentistry, Araraquara Dental School, Univ Estadual Paulista (UNESP), Araraquara, Brazil

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Wilfredo Gustavo Escalante-Otárola

Wilfredo Gustavo Escalante-Otárola

Department of Restorative Dentistry, Araraquara Dental School, Univ Estadual Paulista (UNESP), Araraquara, Brazil

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Keren Cristina Fagundes Jordão-Basso

Keren Cristina Fagundes Jordão-Basso

Department of Restorative Dentistry, Araraquara Dental School, Univ Estadual Paulista (UNESP), Araraquara, Brazil

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Regina Guenka Palma-Dibb

Regina Guenka Palma-Dibb

Department of Restorative Dentistry, Ribeirão Preto Dental School, São Paulo University (USP), Ribeirão Preto, Brazil

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Milton Carlos Kuga

Corresponding Author

Milton Carlos Kuga

Department of Restorative Dentistry, Araraquara Dental School, Univ Estadual Paulista (UNESP), Araraquara, Brazil

Correspondence Milton Carlos Kuga, Department of Restorative Dentistry, Araraquara Dental School, São Paulo State University, Humaitá Street, 1680, Araraquara, SP 14801-903, Brazil. Email: [email protected].Search for more papers by this author
First published: 15 June 2018
Citations: 16

Abstract

The aim of the study was to evaluate the effects when acid etching on the dentin surface was immediately performed (I) or 7 days (D) after calcium silicate-based sealer (MTA Fillapex) removal, using 95% ethanol (E) or xylol (X). First study, 60 bovine incisor dentin specimens were impregnated with sealer and divided into six groups (n = 10): (EI), E + I; (XI), X + I; (ED), E + D; (XD), X + D, (UN), untreated and (MR), mechanical removal of sealer. Scanning electron microscopy (SEM) images (500×) were obtained from each specimen and scores assessed the sealer residues persistence. Second study, 60 specimens were similarly treated; however, the specimens were restored with composite resin after the removal protocols. Hybrid layer formation was evaluated using confocal laser microscopy (1,024×). Third study, 60 specimens were similarly obtained and subjected to micro-shear test to evaluate the effects of removal protocols on the bond strength of etch-and- rinse adhesive system to dentin. XI showed the highest persistence of sealer residues (p < .05), similar to MR (p > .05). EI showed the greatest hybrid layer extension, except in relation to UN (p < .05). XI and MR presented the lowest bond strength adhesive system to dentin (p < .05). Acid etching immediately after calcium silicate-based endodontic sealer removal using xylol presented the highest residues persistence and negatively affected the adhesive interface between dentin and etch-and-rinse adhesive system.