There are two different types of professional teeth whitening: in-office whitening and take-home whitening.
In-office whitening
In-office whitening is done under direct supervision from your orthodontist in their office. Your orthodontist paints a protective coating over your gums and soft tissues before carefully applying a stronger bleaching solution to your teeth. Some in-office whitening treatments also make use of a special light that enhances the bleaching process by helping the hydrogen peroxide penetrate deeper into your enamel to break up more difficult stains. In-office whitening can give you noticeably whiter teeth in just one, hour-long office visit.
At-home whitening
With at-home whitening, your orthodontist makes you a custom-fitted bleaching tray from an impression of your teeth. Your bleaching tray conforms to the contours of your teeth and fits snugly over your smile. You fill your bleaching tray with a professional-grade whitening solution and wear it over your smile for about an hour a day. Within just a few weeks, you’ll have noticeably whiter teeth! At-home treatment allows you to whiten your teeth at your own convenience and on your time but can take longer to achieve results.