No, not yet.MediumTex wrote:So did we ever find any evidence that systemic fluoride has any beneficial effects?
No. Anti-fluoride proponents say...MediumTex wrote:Was a double blind study ever done to confirm the hypothesis that systemic fluoridated water was better at preventing tooth decay than other additives or no additives, or do we just fluoridate the water because that's what we've been doing for decades?
This is corroborated by Dr. J. William Hirzy's (National Treasury Employees Union Chapter 280) testimony before the US Senate Subcommittee on Wildlife, Fisheries and Drinking Water.Regarding the effectiveness of fluoride in reducing dental cavities, there has not been any double-blind study of fluoride's effectiveness as a caries preventative. There have been many, many small scale, selective publications on this issue that proponents cite to justify fluoridation, but the largest and most comprehensive study, one done by dentists trained by the National Institute of Dental Research, on over 39,000 school children aged 5-17 years, shows no significant differences (in terms of decayed, missing and filled teeth) among caries incidences in fluoridated, non-fluoridated and partially fluoridated communities.[16]. The latest publication [17] on the fifty-year fluoridation experiment in two New York cities, Newburgh and Kingston, shows the same thing. The only significant difference in dental health between the two communities as a whole is that fluoridated Newburgh, N.Y. shows about twice the incidence of dental fluorosis (the first, visible sign of fluoride chronic toxicity) as seen in non-fluoridated Kingston.
16. Water fluoridation and tooth decay: Results from the 1986-1987 national survey of U.S. school children. Yiamouyannis, J. Fluoride 23 55-67 (1990).
17. Recommendations for fluoride use in children. Kumar, J.V. and Green, E.L. New York State Dent. J. (1998) 40-47.
Source: WHY EPA HEADQUARTERS UNION OF SCIENTISTS OPPOSES FLUORIDATION
Dr. Hirzy's testimony before the Senate Subcommittee — on behalf of a union of EPA-employed scientists — is a must-read:
http://epw.senate.gov/107th/hir_0629.htm
After reading Dr. Hirzy's testimony, it seems that fluoridation has much more to do with politics and bureaucracy than science. The fluoride that is put into our water supply is not the same calcium fluoride that is found naturally in springs and rivers. The fluoride added to the water supply is actually hexafluorosilicic acid — a highly toxic substance that is a byproduct of aluminum production and fertilizer production.
"In the U.S., about 40,000 tons of fluorosilic acid is recovered from phosphoric acid plants, and then used primarily in water fluoridation, sometimes after being processed into sodium silicofluoride"
Source: http://en.wikipedia.org/wiki/Hexafluoro ... _acid#Uses
Same here. The data to support systemic fluoridation seems to be dubious, especially for the very young — but that was the very target of systemic fluoridation. From what I can tell, the scientific research community seems to have moved away from systemic fluoridation and moved more towards examining topical fluoridation.MediumTex wrote:All I am seeing is that we put fluoride in the water because we believe that it prevents tooth decay, but that's like saying we put leeches on sick people because we believe it helps them recover from illness.
The anti-fluoride proponents argue that non-fluoridated countries have seen a decline in tooth decay at the same rate as fluoridated countries...MediumTex wrote:Perhaps a good approach would be to look at parts of the U.S. and developed world that don't fluoridate the water and correct for income disparities, availability of dental care, diet, etc. and see what the difference is in rates of tooth decay.
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Now, many of these non-fluoridating countries use topical fluoride. And many people in European countries use fluoridated salt (which is a form of systemic fluoride). However, people have the ability to voluntarily control their salt intake — or use sea salt — and most people do not serve a lot of salt to infants and toddlers.