Effect of Two Antioxidants Agents on Microtensile Bond Strength to Bleached Enamel.

This in vitro study evaluated the effect of sodium bicarbonate and sodium ascorbate on the microtensile bond strength of an etch-and-rinse system to bleached bovine enamel. Sixty bovine enamel blocks (4x4 mm) were flattened and randomly allocated into 5 groups: G1 (negative control): without treatment; G2 (positive control): bleached with 35% hydrogen peroxide (HP); G3: bleached and stored for 7 days in artificial saliva before restorative procedures; G4: bleached and treated with 10% sodium bicarbonate solution for 5 min; G5: bleached and treated with 10% sodium ascorbate hydrogel for 15 min. HP gel was applied twice (20 min each, except in G1) and the adhesive restorations were performed.

Influence of pH, bleaching agents, and acid etching on surface wear of bovine enamel.

Unlabelled: Development of new materials for tooth bleaching justifies the need for studies to evaluate the changes in the enamel surface caused by different bleaching protocols.

Objective: The aim of this study was to evaluate the bovine dental enamel wear in function of different bleaching gel protocols, acid etching and pH variation.

Material And Methods: Sixty fragments of bovine teeth were cut, obtaining a control and test areas.

Reestablishment of esthetics with minimum thickness veneers: a one-year follow-up case report.

The evolution of adhesive procedures and ceramic systems has allowed for the placement of minimum thickness laminate veneers on unprepared teeth. A 20-year-old post-orthodontics male patient with multiple diastemas required restorative procedures. A multidisciplinary approach was performed, involving gingivectomy, in-office bleaching, and application of minimum thickness veneers.