DAMS Mercury Fact Sheet #15

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Oral Effects of Dental Amalgam

  1. Mercury is one of the most toxic substances in existence and is known to bioaccumulate in the bodies of people and animals that have chronic exposure.
  2. Mercury has a high vapor pressure at room or mouth temperature so that mercury in dental amalgam is continuously vaporized and released into the oral air and saliva and accumulates in the body to high levels.
  3. High levels of mercury are released from dental fillings into the teeth, tooth roots, gums, jawbone, oral tissues, and blood vessels by galvanic currents due to dissimilar metals in amalgam and metal crowns.
  4. For those with large amalgam fillings or metal crowns over amalgam, mercury and other dental metals accumulate in the gums at the base of the teeth and may be seen in the mirror as dark grey or blue “amalgam tattoos.”
  5. Oral bacteria convert mercury released by amalgam into the highly toxic methyl mercury.
  6. The high levels of mercury that accumulate in the mouth and other parts of the body of those with amalgam fillings commonly cause gum inflammation, metallic taste, tender teeth, mouth sores and pre-cancers, bad breath, bleeding gums, throat irritation, and serious autoimmune conditions such as oral lichen planus, stomatitis, eczema, multiple sclerosis (MS), lupus, and thyroiditis, caused by proliferation of inflammatory cytokines.
  7. Due to the high mercury exposure of those with amalgam fillings, high levels of mercury are excreted into sewers by those with amalgam, so that dental amalgam has been found by municipal sewer agencies to be the largest source of high levels of mercury found in sewers and released into water bodies.


Documentation of this information is available from DAMS at amalgam.org.

DAMS is currently working with thousands of people in the U.S. dealing with serious health effects caused by exposure to mercury from amalgam and urges everyone to find out more about this major problem and to get involved in resolving these health safety issues. DAMS can provide information and help to anyone who is interested or who thinks they might have health problems related to their amalgam fillings.

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