Use whitening products While Dr. Apa recommends having teeth professionally bleached one or two times a year with either a laser or by using bleach trays, at up to $1,000 a pop, that can get expensive. Of course, there are many over-the-counter whitening products that can remove surface stains (here's a list of the best and worst teeth whiteners), but Dr. Dorfman advises that people proceed with caution. "Get your dentist's guidance before using [any of them]," he says. "These tooth-whitening agents are not regulated by the FDA or the ADA because they're considered cosmetic, so there's no guarantee that they are safe or effective. Plus, you may not even be a good candidate for whitening, even if they do work."
Dr. Apa suggests that patients "use a whitening toothpaste daily" and also recommends using the Crest Weekly Clean Intensive Cleaning Paste, $14.99. "[It] is a good product that has heavy silica ingredients to brush stains away," he says.
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