Dental Bleaching and New Possibilities: Literature Review

The extrinsic stains usually come from the medium and are associated with dye pigments such as tobacco and coffee, the use of certain types of medications and the accumulation of bacterial plaque, being surface stains and that leave more easily after prophylaxis. Since intrinsic stains can be congenital, related to dentinogenesis and imperfect amelogenesis or can be acquired, from pulp necrosis, fluorosis, repairing dentin formation [1]. Since 1861, Noavais and Toledo [3] reported that the flrst whitening. In cases of non-carious or incisal cervical lesions, dentinal exposure leads to dentin sensitivity during tooth whitening, which is why restoration of these lesions is indicated for treatment to be performed [12]. [...]many techniques are described in the literature to minimize the adverse effects of the bleaching treatment and also to potentiate the effect of the bleaching substances, in view of this circumstance, this work had the objective of carrying out a literature review on the current bleaching techniques. The short wavelength of 400 nm corresponds to the bluish colors, the average wavelengths 540 nm to the green ones and the long wavelengths to the reddish ones. [...]color is nothing more than a wave of energy of specific length; is the visual perception of a given wavelength that determines the colors that the eyes detect [13].