Tooth whitening is used to correct discoloration of a tooth by removing the brown and yellow staining. The term "tooth whitening" or "tooth bleaching" can refer to a number of techniques to improve the brightness of the patient's tooth.

Tooth enamel discoloration can be caused by staining, aging, or chemical damage to teeth. Some of the more common causes of tooth discoloration are medications, coffee, tea or cigarettes. People who drink significant amounts of cola soft drinks can experience similar staining. Damage to the root may also contribute to discoloration.