After analyzing the results, they found hydrogen peroxide caused the collagen in dentin to break down into smaller proteins, which can ultimately ruin the tooth.
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“Our results show that treatment with hydrogen peroxide concentrations similar to those found in whitening strips is enough to make the original collagen protein disappear, which is presumably due to the formation of many smaller fragments,” Keenan said.
The team said they were unsure how harmful hydrogen peroxide can be, because they are in the early stages of research. They hope to continue their investigations to determine how the negative effects of the ingredient could affect patients and whether the damage is permanent.
Essentially, all whitening products in the United States contain hydrogen peroxide and/or carbamide peroxide, according to the American Dental Association (ADA).
The organization said concentration of 10 percent of hydrogen peroxide or higher can be potentially corrosive to mucous membranes or skin. Too much hydrogen peroxide can also cause a burning sensation and tissue damage. Most whitening products contain concentrations of 3.5 percent of hydrogen peroxide.
While ADA organization has previously acknowledged scientists who’ve raised safety concerns about the chemical, the organization said more research is needed.
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