An in Vitro Study to Evaluate the Effect of Two Antioxidants on Microleakage of Composite Resin Restoration after External Tooth Bleaching
Aim and Objective
An in vitro study was done to evaluate the effect of two antioxidant agents, Sodium ascorbate & Vitamin E on the microleakage of composite resin restorations after external tooth bleaching with 10% carbamide peroxide.
Class v cavities were prepared on the buccal surface of 40 intact premolars, which were randomly divided into four groups. All cavities were filled with composite resin. In group 1, teeth were not bleached; in group 2 cavities were filled after bleaching; in group 3 cavities were treated with sodium ascorbate after bleaching and then filled; in group 4 cavities were treated with vitamin e after bleaching and then filled; Microleakage of the restorations was measured from sections using a stereomicroscope.
Non-parametric methods are used for data analysis, kruskal wallis test.
Group 1 displayed the least amount of microleakage, while group 2 showed the greatest amount of microleakage. Groups 3 and 4 showed a significantly lower amount of microleakage compared to group 2.
Microleakage increased significantly after external tooth bleaching with 10% carbamide peroxide, and decreased when the bleached teeth were treated with Sodium Ascorbate and Vitamin E.
Carbamide peroxide, class v cavities, vitamin e, sodium ascorbate.