An in Vitro Study to Evaluate the Effect of Two Antioxidants on Microleakage of Composite Resin Restoration after External Tooth Bleaching Purushottham R1, Sahar Anjum2, Varghese Tom P2, Joy Jittu Abraham2, Samrat M R3, Sujith R4, Kavitha G5 1Professor, Department of Conservative Dentistry and Endodontics, Sharavathi Dental College and Hospital, Shimoga, Karnataka, India 2Post Graduate, Department of Conservative Dentistry and Endodontics, Sharavathi Dental College and Hospital, Shimoga, Karnataka, India 3Professor & Head of the Department Department of Conservative Dentistry and Endodontics, Sharavathi Dental College and Hospital, Shimoga, Karnataka, India 4Reader, Department of Conservative Dentistry and Endodontics, Sharavathi Dental College and Hospital, Shimoga, Karnataka, India 5Senior Lecturer, Department of Conservative Dentistry and Endodontics, Sharavathi Dental College and Hospital, Shimoga, Karnataka, India Online published on 31 August, 2017. Abstract 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. Methodology 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. Statistical analysis Non-parametric methods are used for data analysis, kruskal wallis test. Results 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. Conclusion 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. Top Keywords Carbamide peroxide, class v cavities, vitamin e, sodium ascorbate. Top |