DOI: 10.36347/sjds.2015.v02i02.012

Pages: 154-158

Abstract: Aim of the study was comparative evaluation of surface hardness of three restorative material after application of one in-office bleaching agents. Material used was 35% Carbamide peroxide (Opalescence, Ultradent), Composite resin- filtek Z-350 XT 3M ESPE,USA ,Glass ionomer cement-GC Fuji II LC, Amalgam-DPI Alloy.30 specimens of composite resin, RMGIC and amalgam were fabricated with custom made round metallic matrix die measuring 12mm in diameter & 2mm high. 10 specimens each further randomly subdivided into three subgroups Group 1-Control group(n=15) stored in only distilled Water for 21 days. Group 2- (n=15) treated with 35% Carbamide peroxide. Each sample were analyzed at baseline and after 21 days by the vicker`s microhardness tester, Reichert Austria.By using student paired t test result showed no significant interaction between materials, treatment groups .The in-office bleaching systems that employ strong oxidizing agents is not detrimental to the surface hardness of composite, silver amalgam and resin-modified glass ionomer cements.