LEAD Action News

LEAD Action News vol 5 no 2  1997 ISSN 1324-6011
Incorporating Lead Aware Times ( ISSN 1440-4966) and Lead Advisory Service News ( ISSN 1440-0561)
The journal of The LEAD (Lead Education and Abatement Design) Group Inc.

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Are Amalgam Fillings Safe for Lead-poisoned People?

By Elizabeth O’Brien, Project Coordinator,
NSW Community Lead Advisory Service (CLAS).

Alarming information about the synergistic effects of lead and mercury, recently brought to the attention of CLAS by ASOMAT members, will be the basis of an enquiry by CLAS to the NSW and Federal Health Ministers. ASOMAT is the Australasian Society of Oral Medicine and Toxicology (ph 02 9867 1111), a non-profit organisation founded by concerned doctors and dentists. Amalgam fillings contain 50% mercury.

The original evidence cited for the synergistic effects of lead and mercury (and cadmium) comes from a 1978 paper, Combined effects in toxicology--a rapid systematic testing procedure: cadmium, mercury, and lead. by Schubert J, Riley EJ, Tyler SA.
J Toxicol Environ Health. 1978 Sep-Nov;4(5-6):763-76.

Abstract: http://www.ncbi.nlm.nih.gov/pubmed/731728

"...the administration of an essentially no-response level (LD1) of a mercury salt together with 1/20 of the LD1 of a lead salt killed all of the animals [rats]."

Dr Michael Godfrey and dentist Noel Campbell write:

"...a lethal dose (LD1 [enough to kill 1% of the rats]) was combined with a 1/20th LD1 of lead, resulting in a LD 100 [100% death rate] in the test animals.

"We have recently found that considerable amounts of lead may be excreted with the mercury following DMPS provocation. Our preliminary investigations appear to indicate that a synergistic effect could be identified by multiplying the lead and mercury concentrations together, after adjusting to IG of urine creatinine. We have termed this the Campbell-Godfrey factor (C-G factor). Chronically affected patients may have high levels of either metal or a high total C-G factor. Those with the highest C-G factor appear to be the worst affected, thus indicating that the synergism in animals is replicated in man."

The questions raised are: is it safe for lead poisoned people to have mercury fillings? Should CLAS advise parents of lead-poisoned kids never to allow these fillings in their kid’s mouths? Should CLAS advise lead-poisoned people who are planning to conceive for instance, to have their amalgam fillings replaced, along with DMSA chelation therapy and nutrient replenishment therapy, well in advance of trying to conceive? Is it acceptable for anyone to be exposed to lead and mercury (and cadmium) as they are in mining and smelting communities? Why aren’t the DMPS provocation test, DMSA chelation therapy or amalgam removal procedures claimable under Medicare? When will Australia phase out amalgams?

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Last Updated 13 January 2013
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