safeBABY

Some dentists recommend “sealants” to help kids and teens prevent tooth decay. Dental sealants are coatings that protect the chewing surfaces of back teeth by “sealing” out plaque and food. Dental sealants are plastic, though, and may be a source for low-level BPA exposure at levels that show health effects in rodents, according to a March 2006 study in the Journal of the American Dental Association.

The American Dental Association’s position on BPA:

“…there is some evidence that some dental sealants and to a lesser extent composites [tooth-colored fillings] may contribute to low-level BPA exposure, probably through the action of salivary enzymes on a minor ingredient … The ADA sees no cause for concern at this time regarding potential BPA exposure from composites or sealants. Exposure from these dental materials is significantly lower and occurs infrequently when compared to all other sources of exposure …”

Nevertheless, the ADA supports additional research into how much BPA people are actually exposed to and at what levels of exposure health effects start to occur.

In the meantime, here’s some advice on talking to your dentist from The Green Guide:

• If a dentist suggests sealants for you or your child, ask why, whether it’s necessary on baby teeth and whether decay may be avoided by improving diet and hygiene first.
• If you are considering sealants, ask your dentist or call the manufacturer to check for BPA. Composite fillings [tooth-colored fillings] can also contain this chemical. [Note: The ADA's study found that a sealant called "Helioseal F" made by Ivoclar Vivadent out of Amherst, N.Y., leached "neglible" amounts of BPA. Another sealant tested, called "Delton Light Cure Opaque pit-and-fissure sealant made by Dentsply out of Ash, York, Pa., leached significantly more BPA.]
• If you decide on sealants, immediately after the sealant is applied, chew on a cotton pad to induce saliva and then spit out as much as you can into the sink.
• If you need a filling, choose a composite: though it does contain BPA, studies show exposures are low with composites, making them a better alternative to silver-colored amalgum (contain mercury) fillings.

If you’re pregnant, you should avoid dental sealants or composite fillings altogether, if possible.