A mouldable”tray” or mouthpiece is submerged into hot water for 5 seconds until soft and a bite impression is taken. After shaping the trays for upper and lower teeth, the whitening gel, which contains active ingredient Carbamide Peroxide, is applied to individual trays and inserted into the mouth and over the teeth. One tray at a time is left in place for 20-30 minutes.
Extending treatment times for faster whitening may be alright if your teeth are not over-sensitive. As the gel is activated, a slight tingling or bubbling sensation may be felt, which is the oxidation process taking place. Treatment should be done on upper and lower teeth each day until desired whitening is achieved. Twice a day treatments may also, achieve faster whitening results if teeth and gum sensitivity is not apparent.