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Bisphenol A

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To find information about the topic listed on this page, please visit the page about Bisphenol A (BPA).

Please note: The ADA does not provide specific answers to individual questions about fees, dental problems, conditions, diagnoses, treatments or proposed treatments, or requests for research. Information about dental referrals, complaints and a variety of dental procedures may be found on

Bisphenol A (BPA) is widely used in the manufacture of many consumer plastic products. BPA is used in the manufacture of products such as hard polycarbonate water bottles, some baby bottles, and the lining of food cans and bottle tops. There is also evidence that some dental sealants, and to a lesser extent dental composites, may contribute to very low-level BPA exposure.

BPA can become part of dental composites or sealants in three ways: as a direct ingredient, as a by-product of other ingredients in dental composites or sealants that may have degraded, and as a trace material left-over from the manufacture of other ingredients used in dental composites or sealants.

Some scientific studies have suggested that BPA, like soy and phthalates, may affect reproduction and development in animals by mimicking the effects of the female hormone estrogen, thereby raising concerns about its safety. To date, these effects have not been observed in humans and are questionable at the exposure levels resulting from consumer and dental products.

The ADA believes any concern about potential BPA exposure from dental sealants or composites is unwarranted at this time. When compared with other sources of BPA, these dental materials pose significantly lower exposure concerns.

The Journal of the American Dental Association

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