Bisphenol A Dental Sealants
There have been concerns raised regarding the safety of bisphenol A in dental sealants and composites, which play a significant role in preventing tooth decay and in maintaining dental health. Dental sealants are an important tool in preventing tooth decay by providing a protective barrier on the teeth, particularly when used during a child's formative years. Dental composites are mainly used to fabricate tooth-colored fillings and veneers as well as in cement for crowns. In addition to their functional and aesthetic properties, composites provide an alternative to mercury amalgam.
In 1996, Nicolas Olea and coworkers at the University of Granada in Spain reported detectable levels of bisphenol A (BPA) in the saliva of patients treated with dental sealants, suggesting that children receiving this treatment could be exposed to the chemical. However, subsequent studies, culminating with that of Eric Fung and coworkers, indicate that while extremely low levels of BPA can be detected in the saliva of individuals treated with certain dental resins in the hours immediately following their application, no BPA was detected in the blood stream.
A review of key studies on dental resins containing BPA-based materials reveals that the highest reported acute oral exposure to BPA is more than 50,000 times lower than levels shown to cause acute oral toxicity in animal studies. Although repeated exposure to BPA from dental resins is not expected to occur, the highest reported acute oral exposure is also below the maximum acceptable or "reference" dose for BPA, which is set for repeated exposure over a lifetime. Consequently, exposure to BPA from dental resins for both adults and children is minimal and poses no known risk to human health.
Learn more about BPA dental sealants.