Some undesired stains occur on the teeth in time. There may be many reasons of these stains; the most distinctive ones include frequent consumption of food containing colorant (tea, coffee, coke, smoking etc.), traumas and, antibiotics taken during the development ages. Bleaching is the procedure intended to remove such stains occurring on the porous enamel structure on the tooth surface through the tooth bleaching methods. Bleaching is applied for the discolorations that get inside the tooth through the porous enamel and that are not removable by tooth brushing.