Navigation Links
Measuring mercury: Common test may overestimate exposure from dental amalgam fillings
Date:3/20/2013

ANN ARBORA common test used to determine mercury exposure from dental amalgam fillings may significantly overestimate the amount of the toxic metal released from fillings, according to University of Michigan researchers.

Scientists agree that dental amalgam fillings slowly release mercury vapor into the mouth. But both the amount of mercury released and the question of whether this exposure presents a significant health risk remain controversial.

Public health studies often make the assumption that mercury in urine (which is composed mostly of inorganic mercury) can be used to estimate exposure to mercury vapor from amalgam fillings. These same studies often use mercury in hair (which is composed mostly of organic mercury) to estimate exposure to organic mercury from a person's diet.

But a U-M study that measured mercury isotopes in the hair and urine from 12 Michigan dentists found that their urine contained a mix of mercury from two sources: the consumption of fish containing organic mercury and inorganic mercury vapor from the dentists' own amalgam fillings.

"These results challenge the common assumption that mercury in urine is entirely derived from inhaled mercury vapor," said Laura Sherman, a postdoctoral research fellow in the Department of Earth and Environmental Sciences and lead author of a paper in the journal Environmental Science & Technology. A final version of the paper was published online March 20.

"These data suggest that in populations that eat fish but lack occupational exposure to mercury vapor, mercury concentrations in urine may overestimate exposure to mercury vapor from dental amalgams. This is an important consideration for studies seeking to determine the health risks of mercury vapor inhalation from dental amalgams," said U-M biogeochemist Joel D. Blum, a co-author of the paper and a professor in the Department of Earth and Environmental Sciences.

The study by Sherman, Blum
'/>"/>

Contact: Jim Erickson
ericksn@umich.edu
734-647-1842
University of Michigan
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Oceanographers develop method for measuring the pace of life in deep sediments
2. Measuring our carbon footprint
3. Measuring progesterone receptor expression to improve hormone-receptor-positive cancer management
4. Measuring mercury levels: Nano-velcro detects water-borne toxic metals
5. Bringing measuring accuracy to radical treatment
6. Measuring dispersal -- how well are soft-sediment invertebrate communities connected on the seafloor?
7. Measuring the exertion of mini-basketball players
8. New protocol recommendations for measuring soil organic carbon sequestration
9. New tool for measuring frozen gas in ocean floor sediments
10. A new method for measuring the flow of traffic a street has to bear by measuring atmospheric noise
11. Commonly used herbicides seen as threat to endangered butterflies
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:9/15/2014)... containing carbon-halogen bonds are produced naturally across all kingdoms ... products with a broad range of biological activities. The ... a profound influence on their molecular properties. ... has been to find the late-stage, site-specific incorporation of ... replacing an sp C-H bond (one of the most ...
(Date:9/15/2014)... released today by the National Academy of Sciences, ... and strategies for the program and will guide ... years (2015-2020). In addition, the program announced ... in 2015, will include exploratory grants, early-career research ... $500 million, 30-year program to be run by ...
(Date:9/15/2014)... cognitive function may play roles in one,s musical aptitude, ... timbre, tone durations, and formal structure in music. , ... that extremes in musical aptitude (extreme capacity/no capacity) are ... having moderate aptitude. , "This is a typical feature ... and it is influenced to varying degrees by environmental ...
Breaking Biology News(10 mins):Pitt chemical biologist finds new halogenation enzyme 2NAS Gulf Research Program announces strategic vision, initial opportunities 2NAS Gulf Research Program announces strategic vision, initial opportunities 3NAS Gulf Research Program announces strategic vision, initial opportunities 4
... have discovered a gene in plants that disrupts fertilization ... both the female and male reproductive cells. Their ... in the journal Current Biology, has been named the ... properties. Mutations that do not allow fertilization are ...
... of Grenoble, in France, have discovered that ... by doxorubicin and trastuzumab exposures. The research ... protects against acute chemotherapy toxicity in isolated ... January 2008 issue of Experimental Biology and ...
... - A group of signaling proteins known as Wnt ... muscle and other tissues - depend on a complex ... tissue-building cell sites, according to a study at Cincinnati ... the Retromer Complex - breaks down, the delivery of ...
Cached Biology News:Biologists find unusual plant gene: abstinence by mutual consent 2Biologists find unusual plant gene: abstinence by mutual consent 3A search for protection against chemotherapy cardiotoxicity 2Certain diseases, birth defects may be linked to failure of protein recycling system 2
(Date:9/16/2014)... , Sept. 16, 2014 In preparation ... Texas -based cybersecurity company focused on authentication and ... will support the ability to generate a OTP through ... As a pioneer of user-based RFID authentication, 2FA,s solutions ... physical access, for many years. RFID authentication is broadly ...
(Date:9/15/2014)... , Sept. 15, 2014   Global Science ... of scientific products and services for satellite and ... Solution for Integrated Services (OASIS) from the General ... was selected to provide the government best-value solutions ... Business (SB) category in Pool 4. The OASIS ...
(Date:9/15/2014)... a patient has sepsis, a life-threatening condition in which ... often too fast for antibiotics to help. A new ... a team at Harvard,s Wyss Institute for Biologically Inspired ... , "Even with the best current treatments, sepsis ... 30 percent of the time," said Mike Super, Ph.D., ...
(Date:9/15/2014)... Sept. 15, 2014  iVinci Health LLC, the company ... Revenue Management system, branded as VisitPay®, has successfully closed ... the launch of a new extension to VisitPay® – ... easy and convenient way for patients to manage their ... by them and their families. The new ...
Breaking Biology Technology:2FA, Inc. Announces RFID-based One-Time Password (OTP) Authentication 2Global Science & Technology, Inc. Awarded GSA OASIS Small Business Contract 2Global Science & Technology, Inc. Awarded GSA OASIS Small Business Contract 3Blood-cleansing biospleen device developed for sepsis therapy 2Blood-cleansing biospleen device developed for sepsis therapy 3Blood-cleansing biospleen device developed for sepsis therapy 4iVinci Health Raises $5M to Fuel National Expansion, Announces Launch of Personal Finance Portal for Healthcare 2iVinci Health Raises $5M to Fuel National Expansion, Announces Launch of Personal Finance Portal for Healthcare 3
... Approval Shortly -- , , LAKE FOREST, Ill., June ... world leader in generic injectable pharmaceuticals, today announced that the ... granted summary judgment of non-infringement in Hospira,s favor with regard ... tentative approval from the U.S. Food and Drug Administration (FDA) ...
... LANSING, Mich., June 18 Fortune Magazine has named ... its annual list of the "40 best stocks to retire on." ... list in 2002, stating: "We wanted to assemble a diversified, dependable ... could soar when the market did but also hold steady during ...
... Optical Industry Ltd. (Nasdaq: SHMR ) a leading ... market, announced today that its annual report on Form 20-F, ... 31, 2008, as filed with the Securities and Exchange Commission ... www.shamir.co.il ). Shareholders may receive a hard copy of the ...
Cached Biology Technology:Hospira Receives Favorable Court Decision on Eloxatin(R) 2Hospira Receives Favorable Court Decision on Eloxatin(R) 3Neogen Named to Fortune's List of 40 Stocks 'To Retire On' 2Shamir Optical Industry Ltd. Announces Availability of Its Annual Report on Form 20-F Through Its Website 2
Agarase cleaves agarose to neoagaro-oligosaccharides, and is used for,quantitative, gentle recovery of DNA from low melting point agarose....
Form: Ready to use Applications: ELISA...
Form: Concentrated Applications: ELISA...
Form: Ready to use Applications: Western Blot, ELISA...
Biology Products: