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There are a number of ways that a dentist can help whiten teeth, but in today's society, professional teeth whitening is the most popular option. This professional alternative is a method of whitening teeth utilizing a special gel and a special light. There are many, however, who question exactly how this works and what they will get from it. Below are some of the most frequently asked questions about teeth whitening. Q: How does teeth whitening work? A: It's important to note that professional teeth whitening works only for those who have extrinsic stains, which are stains that are on the teeth thanks to an outside influence, such drinking a great amount of coffee or dark soda. Professional teeth whitening works by using a form of hydrogen peroxide that is applied to the teeth. The light that is used allows the peroxide to break down into radical hydroxyl ions which then travel into each tooth to break down the stains. Q: Are there different methods available to whiten my teeth? A