Can Sodium Ascorbate Increase the In Vitro Bond Strength of the Interface between a Composite and Bleached Enamel?

Recently, the use of antioxidants before bonding bleached enamel was considered effective for reversing reduction in bond strength. This article aimed to assess influence different sodium ascorbate (SA) presentations (liquid, gel, and semi-gel) on composite resin–enamel strength after a bleaching protocol. Sound human anterior teeth were collected, cleaned, prepared test, randomly allocated into groups according procedure. Group 1 acted as control, without treatment, applying an antioxidant agent. In 2–6, specimens using 10% carbamide peroxide. 3, 4 5, wt% SA applied 10 min form liquid, semi-gel, respectively. group 6, samples immersed fresh saliva 14 days. After process, materials restored by means adhesive system resin material. The analysis revealed that differences between shear (SBS) statistically significant (p = 0.0469). highest SBS achieved where liquid procedures. application might reverse negative impact has enamel.