“…These dentifrices, in their majority, present in their composition a great proportion of abrasive agents, which remove more amount of biofilm, generating a false impression of whitening accompanied by a greater risk of damages to the enamel. It is also possible that the abrasive action generates excessive demage of these structures, increasing the porosity and predisposing the dental units to future stains [7,8]. Several types of toothpaste that offer a practical and fast whitening effect have been freely offered at drugstores and supermarkets shelves and they are acquired by patients, who normally make uninterrupted use of these cosmetics without professional guidance expecting to have their teeth effectively cleared [4].…”