Whitening trays require two short office appointments. At your first appointment, we will take an impression of your teeth. The impression will be sent to a lab, and your custom trays will be ready to pick up in a few weeks. Your second appointment will be a quick fit check, and then you are ready to go! Use the provided whitening gel with your trays until you achieve your desired results. Whitening trays can improve your smile by 4-8 shades.