PMID: 11317373Apr 25, 2001Paper

Influence of collagen removal on shear bond strength of one-bottle adhesive systems in dentin

The Journal of Adhesive Dentistry
A K de CastroL A Pimenta

Abstract

The aim of this study was to evaluate the influence of collagen removal on shear bond strength (SBS) of three hydrophilic one-bottle adhesive systems in dentin. Test specimens were taken from one-hundred twenty bovine incisors. The specimens were debrided, polished with 320- to 600-grit Al2O3 paper, and randomly divided into 6 groups (n = 20): G1: acid/10% NaOCl + Bond 1 (B1H); G2: acid + Bond 1 applied according to manufacturer's instructions (B1); G3: acid/10% NaOCl + Optibond Solo (OSH); G4: acid + Optibond Solo used according to manufacturer's instructions (OS); G5: acid/10% NaOCl + Single Bond (SBH); G6: acid + Single Bond used according to manufacturer's instructions. In all groups, dentin was etched for 15 s, rinsed, and dried. In groups 1, 3, and 5, the 10% NaOCl was applied with a dwell time of 60 s, rinsed, and dried. In all groups, the adhesive systems were applied and light cured, and then a restorative composite resin (Z-100) was inserted in a teflon matrix and cured. The specimens were stored in humid conditions for 7 days at 37 degrees C. The SBS tests were performed in an EMIC universal testing machine with a crosshead speed of 0.5 mm/min. The mean bond strengths in MPa (+/- SD) were analyzed with two-way ANOVA ...Continue Reading

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