Navigation Links
Older dental fillings contain form of mercury unlikely to be toxic
Date:1/27/2010

A new study on the surface chemistry of silver-colored, mercury-based dental fillings suggests that the surface forms of mercury may be less toxic than previously thought. It appears online in ACS' journal Chemical Research in Toxicology.

In the study, Graham George and colleagues note that mercury-based fillings, also called amalgams, have been used by dentists to repair teeth for well-over a century. In recent decades their use has become controversial because of concerns about exposure to potentially toxic mercury. However, mercury can potentially exist in several different chemical forms, each with a different toxicity. Prior to this report, little was known about how the chemical forms of mercury in dental amalgam might change over time.

Using a special X-ray technique, the scientists analyzed the surface of freshly prepared metal fillings and compared these with the surface of aged fillings (about 20 years old) from a dental clinic. Fresh fillings contained metallic mercury, which can be toxic. Aged fillings, however, typically contain a form of mercury, called beta-mercuric sulfide or metacinnabar, which is unlikely to be toxic in the body. The scientists found that the surfaces of metal fillings seem to lose up to 95 percent of their mercury over time. Loss of potentially toxic mercury from amalgam may be due to evaporation, exposure to some kinds of dental hygiene products, exposure to certain foods, or other factors. The scientists caution that "human exposure to mercury lost from fillings is still of concern."


'/>"/>

Contact: Michael Bernstein
m_bernstein@acs.org
202-872-6042
American Chemical Society
Source:Eurekalert  

Page: 1

Related medicine news :

1. Ability to cope with stress can increase good cholesterol in older white men, study finds
2. Many Older Americans Have Active Sex Lives
3. Good Cholesterol Wont Help Heavy-Drinking Older Men
4. Manor Care, Inc. Announces Record Date for Special Stockholder Meeting
5. Arrow International Urges Shareholders To Vote for Approval of the $45.50 Teleflex Inc. Merger and for the Current Board of Directors
6. Frequent alcohol consumption increases cancer risk in older women
7. Zimmer Holdings Offer and ORTHOsoft Directors Circular Mailed to Shareholders
8. ISS and Glass Lewis Recommend Cholestech Stockholders Vote FOR Merger
9. Glass Lewis Recommends Arrow Shareholders Vote on the White Proxy Card for Merger With Teleflex and for Current Board of Directors at Arrow Annual Meeting
10. Drug-free treatments offer hope for older people in pain
11. United Medicorp, Inc.s Shareholders Approve All Proposals
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Older dental fillings contain form of mercury unlikely to be toxic
(Date:8/22/2017)... Indiana (PRWEB) , ... August 22, 2017 , ... Although ... Fourth of July, many communities have begun providing weekend displays, and numerous households celebrate ... most humans, they can be downright terrifying for pets. , Kris Zambo, owner ...
(Date:8/21/2017)... Angeles, California (PRWEB) , ... August 21, 2017 ... ... is announcing the addition of two plastic surgery fellows for academic year 2017-2018, ... designed for candidates who have successfully completed residency in Plastic and Reconstructive Surgery. ...
(Date:8/21/2017)... Milwaukee, WI (PRWEB) , ... August 21, 2017 ... ... recent years, with events taking place all over the country. , Outdoor running ... that marathon runners are at an increased risk of melanoma, and only half ...
(Date:8/21/2017)... ... August 21, 2017 , ... The American Hospital Association (AHA) has ... Highmark Health company, to its Board of Trustees for a three-year term beginning January ... care provider organizations and individuals that are committed to the improvement of health in ...
(Date:8/20/2017)... ... August 20, 2017 , ... A total solar eclipse will occur across the U.S. ... the moon moves between the sun and Earth. This rare event will be magnificent to ... help keep you safe on the road during the total eclipse of the sun. , ...
Breaking Medicine News(10 mins):
(Date:8/4/2017)... 4, 2017 The search for test results ... physician/patient consult has long been the goal of healthcare ... focus of the largest meeting of lab professionals and ... market research firm Kalorama Information.  The firm said scores ... or related supplies and software were at the American ...
(Date:8/2/2017)... -- Life Flight Network and PeaceHealth Oregon Network announced they renewed ... operational efficiency for patients at hospitals in Eugene ... Grove , and Florence, Oregon , ... Network work collaboratively to move patients who require the highest ... sensitive emergency exists. ...
(Date:7/31/2017)... TORONTO , July 31, 2017 7D Surgical, ... Spartan Medical has purchased the 7D Surgical System to support ... Washington D.C. and Virginia.  7D Surgical ... Medical for many of the premier medical facilities within those ... ...
Breaking Medicine Technology: