How Long Should Trays Be Worn During In-Home Whitening?
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Fast Results
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In-home teeth whitening systems bleach stains off the teeth, and the longer they are worn every day, the faster they work, according to the University of Maryland Medical Center.
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Risk of Side Effects
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Gum irritation and tooth sensitivity remain the two biggest complaints of in-home teeth whitening systems. The more exposure the teeth have to the whitening substance, the more likely it is that such side effects will develop, according to Harvard Medical School.
Bottom Line
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Wear trays for two to four hours a day at a minimum and no longer than overnight depending on the strength of the bleaching agent, as recommended by the University of Maryland Medical Center. (See References 1)
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