Using a special whitening gel the dentist bleaches your teeth in the dental office with the help of special light activating source. The length of time in the dental chair depends on the degree of discolouration you have but 2 hours is an average.
Custom-fit Tray Bleaching (Home Bleach)
A custom made tray is worn around the teeth. A small amount of gel is placed in the tray and worn for a short time each day (around 2-3 hours). It may take upto 2 weeks to see a noticeable change in the shade. This bleach system may be used as a follow-up after the office bleach.