Long-term effect of ethanol on the bond strength of fiber-glass posts to root dentin
DOI:
https://doi.org/10.15448/1980-6523.2014.2.12666Keywords:
Cementation, intracanal retention, root posts, ethanolAbstract
Objective: To evaluate the long-term effect of ethanol (EtOH) application on the bond strength of adhesive systems used in post luting to root dentin.
Methods: Bovine roots (n=40) had their root channel prepared for post luting and were etched with 37% phosphoric acid (15 s). Specimens were distributed according to adhesive system and EtOH application. Control groups received only the application of adhesives Adper ScothBond Multi-Purpose Plus (ASb), ou Adper Single Bond (SB). Experimental groups received previous EtOH application for 1 minute (EtOH+ASb and EtOH+SB groups). After fiber glass post luting, specimens were stored for 24 h, or 12 months, and later subjected to push-out test (n=5). Data were analyzed by three-way analysis of variance and Tukey test (α<0.05).
Results: The EtOH application did not influence the bond strength values in immediate evaluation (24 h), regardless of the adhesive system used (p>0.05). After 12 months, it was observed significant statistically reduction of adhesive resistance (p<0.05); however the EtOH+SB group did not presented statistical difference between the evaluated storage periods (p>0.05).
Conclusion: EtOH pre-treatment contributes to maintain the long-term bond strength, when water and ethanol-based adhesive system is used.
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