The next whitening option that we will discuss is also one of the most popular. This type of whitening is commonly referred to as take home whitening or custom tray whitening. Typically, a mould is taken of the teeth and then thin flexible trays that fit very precisely over the teeth are fabricated. The trays are comfortable to wear and fit very well as they are made from impressions of your teeth. The whitening solution, again a hydrogen or carbamide peroxide is placed in the trays and the trays are worn for about an hour a day for 10-14 days.
The advantage with the custom tray whitening is that the whitening solution is well contained in the tray. Therefore, a peroxide solution of much higher concentration can be used. As a result, the degree of whitening is greater than with over the counter products that have a lower concentration of peroxide.
We use a carbamide peroxide gel of 16% to 35 %.
The side effects are very similar. Tooth sensitivity is common but transient and it does go away after the whitening period. The take home gel that we use does have ingredients to help reduce the amount of sensitivity that occurs.
The trays are long lasting and can be used for touch up treatments for many years after the initial treatment.