Bleaching can be done in two different ways: office bleaching and home bleaching . Materials used in this process are hydrogen peroxide similar chemical agents. Office type whitening can be apply by the doctors in the clinic with high chemical content materials, while home bleaching process apply by individual him/herself at home by products with lower dosage content are used.
In the bleaching process, the level of whitening and the time, that takes to preserve its color, depend on a wide variety of variables. As these depend on the structure of the person's tooth enamel, oral hygiene, genetic factors; Tea, coffee, or smoking are also affect the process.
Teeth whitening treatmet doesn't disrupts the tooth structure if you have done at appropriate intervals by your dentist.