Ability of Whitening Toothpastes in Removing Stains from Composite Resinsproperty compared to standard dentifrices. The dentifricesused by Yankell et al. 28 and Sharma et al. 29 may containingredients with chemical action. The importance ofchemical action has also been demonstrated by Koertge etal., who performed a longitudinal clinical study on bakingsoda based dentifrices and found that they are significantlymore effective in removing extrinsic stain than standardsilica-based dentifrices (abrasive type) although it is lessabrasive compared to the silica-based dentifrices.Koertge et al. 8 had stated that the whitening effector stain removal effect of a dentifrice may not solelyrelated to its abrasiveness. In the present study, ColgateTotal, Colgate Advanced Whitening and Darlie All ShinyWhite demonstrated no significant difference in the abilityto remove stains from three types of composite resinsi.e. Filtek Z350 (nanofilled), Filtek Z250 (microhybrid)and Beautifil (Giomer). Both Colgate Total and ColgateAdvanced Whitening were manufactured by the samemanufacturer. It is important to take note of the increase insurface roughness of composite resins when brushed withwhitening dentifrices with high abrasivity. The increase insurface roughness after long term toothbrushing may leadto easier absorption and adsorption of external stains 30 .Eventually, this may negate the purpose of the whiteningdentifrice and formed a vicious cycle of stains formation.CONCLUSIONWithin the limitations of the present study, it canbe concluded that coffee solution has the ability to staincomposite resins on prolonged and heavy consumptionleading to discolouration that can be perceived clinically.The clinicians should warn patients with large compositerestorations to reduce intake of coffee or rinse immediatelyafter consumption to avoid unsightly discolouration of therestorations. Filtek Z350 was more stain resistant thanFiltek Z250 and Beautifil. 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