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Related Experiment Videos

Putting dental mercury pollution into perspective.

D W Jones1

  • 1Division of Biomaterials, Dalhousie University, 5981 University Avenue, Halifax, Nova Scotia, Canada B3H 3J5. d.w.jones@dal.ca

British Dental Journal
|September 18, 2004
PubMed
Summary

Dental amalgam waste is a minor mercury source. Dental mercury contributions to environmental pollution are minimal, with natural sources and fossil fuel burning being far greater contributors.

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Area of Science:

  • Environmental Science
  • Toxicology
  • Public Health

Background:

  • Dental amalgam, a mixture of mercury and other metals, is used in fillings.
  • Mercury is a toxic heavy metal with various environmental and health implications.
  • Understanding mercury sources is crucial for effective environmental and health policies.

Purpose of the Study:

  • To assess the contribution of dental amalgam waste to overall environmental mercury pollution.
  • To compare dental mercury discharge with other anthropogenic and natural sources.
  • To highlight the importance of differentiating mercury speciation for health impact assessments.

Main Methods:

  • Literature review and data synthesis on mercury sources and environmental discharge.
  • Comparative analysis of mercury contributions from dental offices, dental amalgam fillings, industrial activities, and natural processes.
  • Review of toxicological data differentiating inorganic and organic mercury impacts.

Main Results:

  • Dental offices contribute a very small fraction of the total mercury discharged annually.
  • Mercury released from amalgam fillings in situ is significantly less than that from dental offices.
  • Natural sources account for at least 50% of environmental mercury, while industrial fossil fuel burning is the primary anthropogenic source.

Conclusions:

  • Dental amalgam waste is not a significant contributor to overall environmental mercury levels.
  • Environmental mercury pollution is predominantly driven by natural processes and industrial activities, particularly fossil fuel combustion.
  • Distinguishing between inorganic and organic mercury is essential for accurate health risk assessment.

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