The influence of 1% sodium hypoclorite in the bond strength between the radicular dentin and the fiber post using three cementing agents

• Autor(a) principal: Motta, Carmen de Andrade Vilas Boas
• Data de Publicação: 2016
• Outros Autores: Silva, Marcelo Filadelfo, Cruz, José Flávio Wanderley, Ribeiro, Fernando Carneiro, León, Blanca Liliana Torres
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Revista odonto ciência (Online)
• Texto Completo: https://revistaseletronicas.pucrs.br/ojs/index.php/fo/article/view/16736
• topic: Post and Core Technique; Root canal therapy; Sodium hypochlorite; Pinos de retenção dentária; Endodontia; Hipoclorito de sódio; pinos de fibra

Objective: To verify, in vitro, the influence of 1% NaOCl on the bond strength between intrarradicular dentin and fiberglass post using three luting systems. Methods: Sixty upper anterior teeth, endodontically treated, received a fiberglass post (White Post DC) and different luting systems: Relyx™ U200 (RU), Relyx ARC (RARC) and RelyX™ Luting 2 (RL). Before luting, samples were randomly divided into six groups: according to the irrigant, distilled water (DW) or 1% Sodium hypochlorite (NaOCl), and luting system: RU+DW, RU+NaOCl, RARC +DW, RARC+NaOCl, RL+DW, RL+NaOCl. After luting, roots were sectioned in three portions and subjected to “push out” test 0.5 mm/min in EMIC DL machine. Under stereoscopic microscope (25x), the type of fracture was evaluated. Results: According to the ANOVA and Tukey post hoc test (p<0.05), there was statistical significant difference in the interaction NaOCl/RARC. The RL had the lowest values of bond strength. The Relyx ARC showed greater bond strength in the cervical third. Most of fractures were in the interface adhesive bonding root/cement, followed by cement adhesive fractures in the interface and post. Conclusion: 1% NaOCl reduced bond strength into the cervical third to RARC. The glass ionomer cement showed the lowest values of bond strength in the different dentin regions.