New research suggests that whitening products could weaken teeth, and dentists share their own concerns.
Teeth whitening is expected to become a $7.4 billion industry by 2024, with Americans spending $1.4 billion alone on over-the-counter whiteners to bleach away the stains from cigarettes, red wine, coffee and natural aging, according to the American Academy of Cosmetic Dentistry. But preliminary research presented at the American Society for Biochemistry and Molecular Biology’s annual meeting this week suggests that these whitening strips could be damaging teeth beneath the surface.
The study, led by Kelly Keenan, an associate professor of chemistry at Stockton University, treated extracted human teeth with whitening strips, following the manufacturer instructions to leave them on for an hour. Researchers also immersed the teeth in artificial saliva and washed them, to simulate what teeth experience in a human mouth.
There are some limitations; this was not a peer-reviewed study, and living teeth in a person’s mouth will react differently to whitening agents than extracted teeth. “Those teeth were probably dehydrated and had a different composition than the teeth that are in a living person,” author and orthodontist Dr. Ana Castilla told MarketWatch. “Still, it’s good to always keep an eye out on what the research is showing about products that we commonly use.
The dentists that MarketWatch spoke with recommended getting a professional whitening done to mitigate risks from incorrect use. “Whitening is best done under the supervision of your dentist. If you’re not supervised with the whitening strips, and you don’t place them properly, you can burn your gums or create white spots on your gums,” said Dr. Castilla.
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