Tooth whitening works to lighten the shade of your teeth by removing stains or discolouration caused by aging, or medications, as well as diet and lifestyle factors such as drinking coffee, tea, and wine, or the use of tobacco products. Tooth-whitening is not permanent, so the procedure may have to be repeated on a regular basis to maintain the desired shade.
In order to whiten your teeth, you dentist will take an impression of your teeth to make custom trays that fit your teeth. They will then give you a supply of bleaching gel (typically containing hydrogen or carbamide peroxide) which will be applied to the tray, which you will then place in your mouth and wear for a certain amount of time. You should take care to follow your dentist’s instructions carefully and only use the prescribed amount of whitening gel as an excess can contact your gums and cause irritation.
While whitening your teeth, you may feel some sensitivity. This is a normal side effect and usually subsides in a few days. Talk to your dentist if the sensitivity does not subside or you notice any other side effects.