There are three whitening techniques that can be performed at the dentist's office.

• A one-hour appointment where the dentist applies a whitening gel to the teeth containing high concentrations of peroxide while ensuring the gums are protected.
• A custom-made mouth tray can be made by the dentist whereafter the patient places peroxide gel in the mouth tray and then wears them every day for one to two weeks, for as little as an hour a day, or overnight at the longest.
• A combination of both techniques where the first phase at the dentists is followed up with gel and mouth trays at home.