Bleaching is a method used to lighten teeth for cosmetic reasons. Tooth discoloration differs from plaque in that the coloring substances are stored in the enamel and dentin below the tooth surface and cannot be removed during professional tooth cleaning. Although professional tooth cleaning cannot remove these “internal” discolorations, professional tooth cleaning should be carried out before bleaching so that the tooth color can be better assessed and the whitening substances can take effect more effectively. The teeth should also be examined for tooth and gum damage before treatment.<\/p>\n<\/div><\/div><\/div>