Hello I am HenryPatterson and work as a dentist for healthysmiles dental group. Please consider closer look at zoom teeth whitening, how it works? Zoom teeth whitening takes only about an hour and it’s a process that is quite simple. To start out, you’ll have a mouth guard put in your mouth around the gums and lips to protect them while exposing your teeth. Then a special gel will be applied to your teeth, which helps to reduce tooth discoloration and break up any surface stains.