Bisphenol A (BPA) is a chemical that has been used to manufacture polycarbonate plastics and epoxy resins for more than 50 years. Epoxy resins containing BPA are used in some dental sealants and composites.
Some scientific studies have suggested that BPA, like soy and phthalates (chemicals added to plastics to increase flexibility and durability), may affect reproduction and development in animals by mimicking the effects of the female hormone estrogen. This has raised concerns about its safety. To date, these effects have not been observed in humans. The amount of BPA to which people are exposed is estimated to be much lower than the amount of BPA exposure considered safe by government agencies.
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.