1Department of Conservative Dentistry and Endodontics, Aditya Dental College, Beed-431122, Maharashtra.
2Department of Prosthodontics, Aditya Dental College, Beed-431122, Maharashtra, India
Online published on 22 June, 2012.
The aim of the present study was to evaluate the effects of different concentrations of sodium hypochlorite applied for 30 seconds on acid etched dentin on the shear bond strengths of an acetone-based adhesive.
40 freshly extracted molars were used as specimens to evaluate shear bond strength of composite to sodium hypochlorite (NaOCl)-treated dentin using Prime and Bond NT dentin bonding agent after 10% NaOCl (Group I), 5% NaOCl (Group II), 2.5% NaOCl (Group III) and No NaOCl (Control) treatment. Shear bond strengths of all specimens were measured using an Intron Universal Testing Machine.
Group II demonstrated higher bond strengths than Groups I, III and IV. Groups I, III and IV did not show any statistically significant differences in their bond strengths. Group III demonstrated the least bond strength. Group I showed similar bond strength as that of Group IV.
Highest shear bond strength values were demonstrated by Group II i.e. 5% sodium hypochlorite treatment group. This could be because of partial decollagenation and formation of an optimum hybrid layer.
Acetone, Dentin adhesive, Dentin Bonding, Hybrid layer, Shear bond Strength, Sodium Hypochlorite
