posted on Sep, 25 2012 @ 12:52 PM
reply to post by CoherentlyConfused
Is there any way you could show some research suggesting or proving that ingesting fluoride is just as effective as using it topically?
The main component of enamel is hydroxyapatite, a crystal with the formula Ca5(PO4)3(OH). This mineral dissolves when pH drops below 5,5. Fluoride
ions replace the OH group, forming fluoroapatite Ca5(PO4)3F, which dissolves when pH drops below 5,2. This 0,3 pH difference is what makes fluoridated
enamel more resistant to tooth decay (which is basically acidic breakdown of the tooth) than unfluoridated enamel. A pH drop to 5,3 that would
dissolve hydroxyapatit would not dissolve fluoroapatit.
Current research indicates that preeruptive effect of fluoride (incorporation into apatite crystals during tooth development from blood supply) is far
less important than posteruptive effect (incorporation into apatite from the saliva). Thus topical intake seems to be more effective than systemic
intake (citation: Systemic vs. Topical Fluoride
But we must keep in mind that fluoridated water, in contrast with fluoride tablets, its both systemic and topical fluoride treatment (it is both
ingested and washes the teeth when drank), so in areas where people do not have access to mouthwashes or toothpastes with fluoride (or do not use
them), water fluoridation is still useful, and better than nothing.
I would like to know if there has ever been a study done with, say, 2 groups of people, one group uses fluoride toothpaste and drinks fluoridated
water and the other group does not and find out what the results of their dental checkups would be after a year. Does anyone know if anything like
that has ever been done or do the fluoride proponents base their findings off of towns that have fluoride in the water compared to dental health for
Yes, there have been many such studies. Some examples:
214 studies were included. The quality of studies was low to moderate. Water fluoridation was associated with an increased proportion of children
without caries and a reduction in the number of teeth affected by caries. The range (median) of mean differences in the proportion of children without
caries was −5.0% to 64% (14.6%). The range (median) of mean change in decayed, missing, and filled primary/permanent teeth was 0.5 to 4.4 (2.25)
teeth. A dose-dependent increase in dental fluorosis was found. At a fluoride level of 1 ppm an estimated 12.5% (95% confidence interval 7.0% to
21.5%) of exposed people would have fluorosis that they would find aesthetically concerning.
The evidence of a beneficial reduction in caries should be considered together with the increased prevalence of dental fluorosis. There was no clear
evidence of other potential adverse effects.
The results of the Grand Rapids-Muskegon study after 10 years of observation indicate that the adjustment of the fluoride content of a communal
water to an optimal level (approximately 1 p.p.m. fluoride) will produce the following effects:
1. A striking reduction in the prevalence of dental caries in the deciduous teeth. At the peak of prevalence, namely 6 years of age, the caries rate
for the deciduous teeth was reduced by about 54 percent.
2. A marked reduction in the prevalenice of dental caries in the permanent teeth. In children born since fluoridation was put into effect, the caries
rate for the permanent teeth was reduced on the average by about 60 percent.
The best available evidence suggests that fluoridation of drinking water supplies does in fact reduce caries prevalence, both when measured by the
proportion of children who are caries-free, and by the mean change in dmft/DMFT score. However, to have real confidence in the ability to determine
whether the fluoridation of drinking water reduces caries prevalence, the quality of evidence would need to be higher. The failure of these studies to
deal with potential confounding factors or to provide standard error data means that the ability to definitively answer the question is limited. The
studies were of moderate quality, but of limited quantity. Future research into the safety and efficacy of water fluoridation should be conducted with
methodology that can improve the quality of the evidence base.
edit on 25/9/12 by Maslo because: (no reason given)
25/9/12 by Maslo because: (no reason given)