Abstract
The aim of this study was to investigate the effect of sodium hypochlorite (NaOCl) on the shear bond strength of fifth- and seventh- generation adhesive resins to coronal dentin. Thirty human third molars were selected and sectioned into two halves buccolingually. Sixty samples were randomly divided into four groups (n = 15). The crowns were separated from the roots. Subsequent to the removal of pulp tissue, the inner surfaces of tooth crowns were rubbed using 600-grit silicon carbide paper in order to obtain flat dentin surface. In group 1, Single Bond (the fifth generation adhesive resin) was used. In group 2, single bond adhesive resin was used subsequent to NaOCl solution application. In groups 3 and 4, the same procedures as described for groups 1 and 2, were repeated respectively, except for the fact that instead of the fifth generation adhesive resin, the seventh generation adhesive resin (Clearfil S3 Bond) was used. Subsequent to composite resin placement over dentin surfaces, the samples were subjected to shear bond strength test. Data were analyzed using ANOVA and Tukey test. The significance level was set at p<0.05. There were statistically significant differences between the groups (p<0.05). The use of NaOCl reduced the shear bond strength of fifth- and seventh-generation adhesive resins to dentin and there was no difference in the shearing bond strength of both adhesive resins. Key words: Shear bond strength, sodium hypochlorite, fifth generation adhesive resins, seventh generation adhesive resins.
Highlights
Lack of a proper adhesion and seal between the final restoration and tooth structures in endodontically treated teeth may result in a poor prognosis of the root canal treatment because penetration of microorganisms through the tooth crown once again contaminates the root canal system
The aim of this study was to investigate the effect of sodium hypochlorite (NaOCl) on the shear bond strength of fifth- and seventh- generation adhesive resins to coronal dentin
The quality of the final restoration of the tooth is an important factor for the evaluation of prognosis after root canal treatment (Ozturk and Ozer, 2004)
Summary
Lack of a proper adhesion and seal between the final restoration and tooth structures in endodontically treated teeth may result in a poor prognosis of the root canal treatment because penetration of microorganisms through the tooth crown once again contaminates the root canal system. Fifth-generation dentin-bonding resins are totaletch adhesives, in which the etching procedure is carried out separately and the primer and bonding agent have been incorporated into one bottle. Seventhgeneration adhesives (all-in-one) have been introduced, which belong to self-etch adhesives and do not require a separate etching and rinsing procedure, and saves time. In these systems, the etchant, primer and bonding agent have been incorporated in one bottle (Van Meerbeek et al, 2006)
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