This simple cosmetic dentistry process is used to lighten enamel and dentin colorings through the use of a gel based on hydrogen peroxide (hydrogen peroxide). Whether in office or at home, no whitening treatment should be carried out without first having carried out a thorough oral examination by a dental surgeon in order to verify the absence of contraindications (untreated cavities, devitalized teeth, weakness enamel, gum irritation, etc.) as well as effective scaling.