April 29, 2010
Category: Uncategorized
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Welcome to Our Blog!

David Johnson, DDS is excited to announce the launch of our new blog. We believe that dental health care is vital to your overall wellbeing and hope you find our blog to be both informative and beneficial to your oral health.

Our blog will keep you up to date with the latest information from the dental field including advancements in treatment, new procedures and practical dental health advice from Dr. Johnson and his staff.

We hope you find our blog to be a great resource for keeping up to date with proper tooth care and dental needs.

We welcome feedback and encourage you to comment on our posts.

-- Dr. Johnson


September 10, 2010

BPA (Bisphenol A) and Dental Sealants

You may have recently read or seen in the news that there is a bit of a controversy regarding potential health hazards of an ingredient that may be contained in dental sealants. Bisphenol A (also known as BPA) may be present in trace amounts in the dental sealants which are routinely placed on permanent molars shortly after they erupt into children's mouthes.

Below are several facts regarding BPA and many of the modern dental materials that are widely used. The "bottom line" is that the benefits of dental sealants greatly outweigh the potential risks of exposure to these minute traces of BPA.

* Dental sealants and composites have been used for many years. Sealants prevent tooth decay and composites are tooth colored dental fillings.

* Resin-based sealants and composites are made from plastic. Some types of plastic have been in the news lately because of a chemical called BPA, a chemical that acts like estrogen. Some studies with laboratory animals suggest a disruption in normal hormone activity. This has led to speculation about the effect of BPA on humans.

* An article that was just published in a medical journal assessed various existing studies on dental materials and BPA. A low level of BPA may be present in the saliva a few hours after placement of resin-based sealants, but based on current evidence, the American Dental Association believes that this low level and brief exposure time poses no known health risk.

* Trace amounts of BPA may be present as a byproduct of the manufacturing process or with certain sealants (those with bis DMA) after coming in contact with enzymes in saliva.

* The one-time exposure to BPA from sealants is about 200 times lower than the daily level EPA considers safe. Dental materials are far less likely to cause BPA exposure than other consumer goods such as plastic bottles and linings of metal cans.

* The researchers say sealants and composites should continue to be used because of their proven benefits which outweigh potential risks of BPA. The researchers also say that BPA exposure can be reduced if a newly-placed sealant or composite filling is rinsed or wiped.



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