Some tooth stains are intrinsic—they are created internally by genetics, Dr. Levine says. These stains need a true whitener, done in a dentist's office. Extrinsic tooth stains, which can be created by smoking and consuming things like coffee, red wine and soy sauce, benefit from a good cleaning and an over-the-counter whitener. Good brushing and flossing habits will prevent most of these stains.
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