You will enjoy a gentle at home treatment that can whiten teeth by up to eight shades during your first visit your dentist will take an impression of your teeth to make custom fitted 39teeth trays39 that are precision made to fit your mouth comfortably allowing the teeth whitening gel to be applied evenly over the surface of your teeth at your second visit your dentist will fine tune your teeth trays take you through the at home process and give you your whitening gel you will then