On September 7, 2010 The American Academy of Pediatrics (AAP) published a very interesting article online titled, "Bisphenol A and Related Compounds in Dental Materials: A Critical Review," which takes a look at dental materials, and their BPA content. Certain dental material such as composite (white) fillings, and dental sealants may contain BPA. It is not yet known how much BPA is absorbed into the body, but what is known is how BPA is released from the resin. Enzymes from your saliva have been found to release the BPA from resin materials. According to the researchers, the time immediately after the placement of such materials represents the period in which the greatest chance of exposure may occur. The research team did note that dentists may reduce the potential for BPA exposure by using an abrasive, such as pumice, to remove the top liquefied layer, in this case for a dental sealant, and rinse the tooth for 30 seconds immediately after placement of the sealants, to reduce the levels of salivary BPA.
Dentists that are concerned about BPA in their resin materials do have options when it comes to selecting the products they use. According to the article, "Dental products that contain the bisphenol A derivative glycidyl dimethacrylate (bis-GMA) are less likely to be converted to BPA and have less estrogenic properties than those containing bisphenol A dimethacrylate (bis-DMA), and the authors suggest the more commonly used bis-GMA resins should be the preferred choice."
Dental restorative materials are no stranger to concern and especially controversy over their safety. Patients that had concerns about amalgam fillings (silver) breathed a collective sigh of relief when composite fillings were introduced some 40 years ago. Now it seems that BPA could possibly be the new "mercury" in dentistry.
Just to mention dentists in the US still install 45 tons of mercury into people heads yearly. 300 tons worldwide.
The WHO did admit in 1991 amalgams are the greatest source of mercury into humans with amalgams. 6 to 8 times greater then all other sources. They constantly shed vapor and micro particles when chewing, brushed or tooth grinding but 10 times more for hours after these actions. 80% of the mercury inhailed is retained in the body. The ADa likes to claim estimates showed only small amounts released. The actual numbers caused Sweden, Norway, Germany to ban amalgams and Japan is heading in that direction.
The FDA warned of risk to child bearing women and infants in 2006 but removed the warning in 2009 with no reason given. Most were positive amalgams would be banned instead. The most complaints ever and lawsuits now bring up a new FDA review for Dec 2010. Mercury is the most toxic neurotoxin non radioactive.
In sheep and money studies in one month it was in all body organs and the brain from amalgams.This was documented in 1991. http://www.iaomt.org has a video of vapor from amalgam and current toxicology data besides amalgam updates and science. Dr Kennedy and Attorney Charlie Brown are at all the big amalgam hearings and lawsuits. Gag orders by the ADa have been mostly lifted against dentists outside the office. Some now speak out with caution for their license may be at risk. Virginia and North Carolina have been will to silence dentists about mercury risk.
good article about BPA in Dental Material: A Growing Concern?
Remember: the more than 99.99% sources of BPA are food and beverage containers.
The possible additional amount from dental fillings is insignificant. Really!
The BPA in dental composite fillings are so minute that studies have failed to show any measurable amount released from fillings.
Good Article about Dental Material:
Thanks…
Very interesting article regading BPA. Thank you for sharing
Andre
A very good article indeed and one of great intrest to me. I work in the Automotive industry and we use an industrial adhesive to bond our chassis…
After several years of using this adhesive I and two of my colleagues have becomes sensitised to it… The key component we have the allergy to is Bisphonal A.. which is used a an epoxy resin hardener.. I am affected now by one part in a million.. it causes my eyes to inflame and rashes to develop over my face and arms..
Once the adhesive is hardened … then it doesn’t pose a problem…. or does it??
I’m now concerned about what fillings I can have.. and have been advised to stay away from white fillings as research has shown that it is possible for the body to absorb minute amounts even… I won’t drink hot drinks out of vending machines as the heat on a plastic cup can cause minute particals to leech out of the plastic.. so could how drinks cause BPA to leech out of fillings….
in response to comment no3.. There are some of us who .01% can cause real issues