Over time, your teeth can go from white to not-so-bright for a number of reasons: food and drinks, tobacco use, age, medication. Bleaching is a way to whiten your teeth and is a simple process. Whitening products contain one of two tooth bleaches (hydrogen peroxide or carbamide peroxide). These bleaches break stains into smaller pieces, which makes the color less concentrated and your teeth brighter.In order to avoid discomfort during the treatment and to eliminate removable discoloration a professional cleaning of the teeth should be carried out beforehand. The teeth should be checked for caries, leaky fillings and crowns, as well as exposed tooth necks and roots. At home, the patient carries a transparent toothed filled with a bleaching gel, which we make previously with the help of an imprint.