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In 1992 a review by the U.S. Public Health Service concluded that it was inappropriate to recommend restricting the use of dental amalgam, because current scientific evidence does not show that exposure to mercury from amalgam restorations poses a serious health risk in humans [13]. This is basically the same position as the ADA. They go on to say, “Sweden, Denmark, and Germany have proposed restrictions on dental amalgam use. They have done so in an effort to diminish both human exposure to and environmental release of mercury and not because of any documented health effects associated with exposure to dental amalgam.” This statement seems to contradict itself and even erode the validity of their claim that amalgams are safe.

Two recent studies by the University of Washington show that mercury in amalgam fillings does not cause health problems, even in young children. The research is referenced in the footnotes. In reply to this research Herbert Needleman M.D., who according to a Newsweek article is the scientist who did more than any other to document the toxicity of lead to developing brains, filed an editorial in JAMA, the Journal of the American Medical Association, in 2006. He argued, “Given limitations in design in the studies by Bellinger et al1 and DeRouen et al it was unscientific to assume a no-effect conclusion. The limitations were statistical power too low to find a relatively small harmful effect, follow-up too brief, and nondifferential errors in exposure measurement that would lead to a null bias. Neither Dr Ismail nor Dr Fung and colleagues addressed these criticisms.”

“Ismail states that neurobehavioral deficits in dental professionals have nothing to do with dental fillings and dismisses my mention of the possible effects of amalgam in the aging brain. The findings of neurological deficits in dental professionals were offered in evidence of the neurotoxicity of amalgam, whatever the source. Both trials1-2 followed up patients for a relatively short period. The potential effects of fetal toxicant exposure on neural function later in life is a subject gathering considerable attention.”