![]() ![]() The types of changes found include: increased surface roughness, increased porosity and loss of microhardness. Some dental researchers have reported significant changes in tooth enamel samples exposed to peroxide whiteners, others only minor to none. ▲ Section references – ADA D) Does it damage tooth enamel? The following facts might help to put any concerns you have at ease. These concerns are based on the fact that they release molecules known as “free radicals,” which might damage a cell’s DNA. ![]() It’s been postulated that the use of whitening gels might cause cancer of the soft tissues of the mouth. It delivers a hydrogen peroxide equivalent of about 3.5%. What are the safety concerns of peroxide whiteners?Īs a point of reference, the safety issues discussed here are with the use of a 10% carbamide peroxide bleaching agent in mind (like that used with the entry-level tray-whitening kits dispensed by most dentists). This helps the manufacturer to ensure product quality and consistency at the consumer’s end. Then why is carbamide peroxide used?Ĭarbamide peroxide can be used in whitener formulations because when it’s exposed to water it breaks down into hydrogen peroxide (and urea), which then breaks down and creates the whitening effect as described above.Ĭarbamide peroxide is used because it’s a comparatively stable compound. The specific compound that breaks down to release free radicals is hydrogen peroxide. ▲ Section references – Carey, Kugel It’s hydrogen peroxide that creates tooth whitening.
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