The dentist will take impressions of your teeth to allow a model to be made by the lab. This is then adapted and a used to produce a specially made tray which fits into the mouth like a gum shield. Your dentist will then advise on the procedure of tooth whitening and provide you with adequate whitening solution, and you will be required to complete the procedure at home. This will involve you applying a small amount of 'bleaching solution' (the active ingredient in which is 16% carbamide peroxide), into the front 'wells' of your bleaching trays. The tray is then fitted into the mouth and any excess solution wiped away with a clean dry tissue. The trays should be worn for 4-6hours or overnight for a period of 2-3weeks until a satisfactory shade is achieved.
It is advisable to avoid products which may stain your teeth (e.g. tea, coffee, red wine, curry) for 1-2hours prior to and after the procedure.
Many patients suffer a slight sensitivity during tooth whitening, which is usually minimal and temporary. Brushing your teeth with a sensitive toothpaste is advisable during the time you are completing the procedure to minimise this. In cases where sensitivity is slightly more uncomfortable, placing a sensitive toothpaste within the trays and wearing these for a couple of night will significantly improve matters.
In teeth that have been root treated and darkened – it may be necessary to re-open the tooth and place the whitening products inside. Whitening results on such teeth can be more unreliable, and in many cases the tooth may not lighten significantly.