Shear bond strength of one-step self-etch adhesives to dentin: Evaluation of NaOCl pretreatment

Marco Colombo, Riccardo Beltrami, Marco Chiesa, Claudio Poggio, Andrea Scribante

Research output: Contribution to journalArticle

Abstract

Background: The aim of this study was to evaluate the influence of dentin pretreatment with NaOCl on shear bond strength of four one-step self-etch adhesives with different pH values. Material and Methods: Bovine permanent incisors were used. Four one-step self-etch adhesives were tested: Adper™ Easy Bond, Futurabond NR, G-aenial Bond, Clearfil S3 Bond. One two-step self-etch adhesive (Clearfil SE Bond) was used as control. Group 1- no pretreatment; group 2- pretratment with 5,25 % NaOCl; group 3- pretreatment with 37 % H3PO4 etching and 5,25 % NaOCl. A hybrid composite resin was inserted into the dentin surface. The specimens were tested in a universal testing machine. The examiners evaluated the fractured surfaces in optical microscope to determine failure modes, quantified with adhesive remnant index (ARI). Results: Dentin pretreatment variably influenced bond strength values of the different adhesive systems. When no dentin pretreatment was applied, no significant differences were found (P > .05) among four adhesives tested. No significant differences were recorded when comparing NaOCl pretreatment with H3PO4 + NaOCl pretreatment for all adhesive tested (P > . 05) except Clearfil S3 Bond that showed higher shear bond strength values when H3PO4 was applied. Frequencies of ARI scores were calculated. Conclusions: The influence of dentin pretreatment with NaOCl depends on the composition of each adhesive system used. There was no difference in bond strength values among self-etch adhesives with different pH values.

Original languageEnglish
Pages (from-to)e127-e133
JournalJournal of Clinical and Experimental Dentistry
Volume10
Issue number2
DOIs
Publication statusPublished - Feb 1 2018
Externally publishedYes

Keywords

  • Dentin
  • Pretreatment
  • Self-etch adhesives

ASJC Scopus subject areas

  • Dentistry(all)

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