The purpose of this study was to evaluate the effect of 20% Carbamide peroxide (CP), 10% Carbamide peroxide (CP) and 25% Hydrogen peroxide (HP) on surface roughness of enamel. No significant differences were found among the bleaching groups (2-3-4). However, all bleaching agents produced a significant increase in the mean surface roughness of enamel compared to the untreated control group (1) (p<0.05). El Halim SAMA (2012) Effect of Three Bleaching Agent on Surface Roughness of Enamel (In-vivo Study). Dentistry 2:133. https://www.omicsonline.org/effect-of-three-bleaching-agent-on-surface-roughness-of-enamel-%28in-vivo-study%29-2161-1122.1000133.php?aid=7218

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