Adhesion of four endodontic sealers to root dentin conditioned with different chemical solutions Adesão de quatro cimentos endodônticos em dentina condicionada com diferentes soluções químicas

Objective – To evaluate in vitro adhesion of endodontic sealers Rickert, AH Plus, Sealapex and Epiphany to dentin previously conditioned with one of two different chemical solutions. Methods – A total of 80 specimens were made up with bovine incisive teeth that were prepared by cutting predetermined sections and wearing them, producing standard experimental samples. Forty samples were treated with 2.5% sodium hypochlorite and divided into four groups with 10 specimens each, to be coated with the different sealers. Dentin of other forty samples was treated with 17% EDTA, and these samples were also divided into four groups. Prepared specimens were hydrated uniformly, dried, bonded and kept at 37°C and 100% relative humidity. After 72 hours, specimens were analyzed using an Instron universal testing machine in traction mode. Data were analyzed by Kruskal-Wallis test (=0.05). Results – EDTA treatment led to the greatest adhesiveness in all experimental groups. Conclusion – It was concluded that conditioning of the surface with chelating agents increase adhesiveness of the tested sealers and similar behavior was observed in the adhesion of epoxy-based and methacrylate-based sealers. Descriptors: Dental cements; Resin cements; Edetic acid; Root canal filling materials