
There is a big difference between in-office and over-the-counter whiteners, but that doesn’t mean you can’t use both to achieve and maintain a bright smile. “The ingredients in whiteners at the dentist’s office are of the highest concentration and are more efficient in changing the color of the teeth,” says Houston cosmetic dentist Guy M. Lewis, DDS. “They give you a better result, although over-the-counter whitening products do work too—they just take longer.”
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