Teeth whitening is a completely harmless process of changing the color of the teeth by a chemical oxidation reaction. The outer surface of the tooth reacts with hydrogen or urea peroxide and the tooth color becomes lighter by six to eight shades. There is office and home whitening kits as well as individual whitening of devitalized teeth.

With office bleaching, the result is achieved faster, but the means used are more aggressive. Home bleaching involves the use of a silicone tray-spoon in which a bleach of lower concentration is placed.

The bleaching itself lasts about three weeks, the results are extraordinary and remineralization with appropriate preparations is applied at the same time.

The desired effect is achieved faster in younger people. The whitening effect lasts for three to four years after which it can be repeated.