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Effect of fluoridation of water on teeth, study
Tooth decay declined substantially in prevalence and severity when Hong Kong children consumed less fluoride, indicative of a world-wide scientific trend revealing, with fluoride, less is best; none is better.
(I-Newswire) - In 1988, Hong Kong reduced water fluoride levels from 0.7 parts per million ( ppm ) to 0.5 ppm. By 1995, 31% fewer 11-year-olds had cavities with a 42% reduction in average cavity rates, according to the Hong Kong Public Health Bulletin ( 1 ). Similar reductions occurred in 1978 when Hong Kong's fluoridation rates were first cut from 1 ppm to 0.7 ppm ( 2 ).
Hong Kong's dental health is superior to the United States' ( 3 ), even though U.S. children consume 1 ppm fluoridated water and brush with 1,000 ppm fluoridated toothpaste. And Hong Kong children use lower concentrated ( 500 ppm ) fluoridated toothpaste ( 4 ).
Evidence that eliminating fluoridation lessens decay:
* Seven years after fluoridation ended in LaSalud, Cuba, cavities remained low in 6- to 9-year-olds, decreased in 10- to 11-year-olds, and significantly decreased in 12- to 13-year-olds, while caries-free children increased dramatically, according to Caries Research ( 5 ).
* East German scientists report, "following the cessation of water fluoridation in the cities Chemnitz . . . and Plauen, a significant fall in caries prevalence was observed," according to Community Dentistry and Oral Epidemiology ( 6 ) . . . Surveys in the formerly-fluoridated towns of Spremberg and Zittau found "caries levels for the 12-year-olds of both towns significantly decreased... following the cessation of water fluoridation."
* In British Columbia, Canada, "the prevalence of caries decreased over time in the fluoridation-ended community while remaining unchanged in the fluoridated community," reported in Community Dentistry and Oral Epidemiology ( 7 ).
* In 1973, the Dutch town of Tiel stopped fluoridation. Researchers counted decayed, missing, and filled permanent tooth surfaces ( DMFS ) of Tiel's 15-year olds, then collected identical data from never-fluoridated Culemborg. DMFS rates initially increased in Tiel then dipped to 11% of baseline from 1968/69 to 1987/88 while never-fluoridated Culemborg's 15-year-olds had 72% less cavities over the same period, reports Caries Research ( 8 ).
In New York State, cavities and tooth loss are greater in fluoridated rather than in non-fluoridated counties ( 9 ). In fact, tooth decay crises exist in most, if not all, large fluoridated U.S. cities ( 10 ).
Sometimes stopping fluoridation has no effect as in Kuopio, Finland ( 11 ), and Durham, North Carolina ( 12 ).
Some countries show lower decay rates in less fluoridated villages when compared to higher fluoridated villages such as in Uganda ( 13, 14 ), the Sudan ( 15 ) and Ethiopia ( 15a ).
In South Australia, dental examinations of 4800 ten- to fifteen-year-olds' permanent teeth reveal unexpected results - similar cavity rates whether they drink fluoridated water or not ( 16 ).
In the United States, despite living without fluoridated water, rural children's cavity rates equal those of urban children, who are more likely to drink fluoridated water, according to a large national government study of over 24,000 U.S. children ( 17 ).
And, to add insult to injury, cavity rates doubled ( 18 ) after water fluoridation began in Kentucky ( 19 ).
References
enn.com/press.html?id=97
SOURCE: New York State Coalition Opposed to Fluoridation, Inc. PO Box 263 Old Bethpage, New York 11804 Paul S. Beeber, President and General Counsel nyscof@aol.com
Websites: orgsites.com/ny/nyscof orgsites.com/ny/newyorkstatecoalitionopposedtofluoridation freewebs.com/nyscof Fluoride NewsTracker Blog fluoridenews.blogspot.com
Fluoride Action Network fluoridealert.org
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