Fluoride & bone cancer.

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Short History

In 1974 the National Health Federation hired John Yiamouyannis. PhD, (JY) for the expressed purpose of discrediting fluoridation. JY initiated the campaign to smear fluoridation by purporting to have found that it causes cancer. His data were proved to be without merit, but served their public relations purpose. In time JY's charges led to a U.S. Senate hearing. Legislators asked the National Toxicology Program (NTP) to test the cancer-causing potential of fluoride. An NTP study of the effects of high doses of fluoride on rats completed in 1991 produced "equivocal" results regarding osteosarcoma (bone cancer).

The New York Department of Health's Department of Occupational. Health, and Yale University's Dept of Epidemiology and Public Health, conducted a case-control study in which 130 subjects diagnosed with osteosarcoma between 1978 and 1988 at age 24 or younger were matched with control subjects by gender and year of birth. Total fluoride exposure was based upon interviews with subjects and/or their parents. Researchers concluded that fluoride exposure does not increase the risk of osteosarcoma, and may have a protective effect in males. The protective effect may not be directly due to fluoride exposure but to other factors associated with good dental hygiene. Because 99% of ingested fluoride is deposited directly into bone, there is a biologic plausibility for a protective effect. [Gelberg. Amer J Publ HIth. 1995;85:1678-83]

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