It’s been around a long time. The time to be exposed to fluoride is from 0 to 6 years of age, when both the primary and permanent teeth are developing.
But how much .7 pp million – very little. So this is the level used in public water supplies. So Moms should drink fluoridated water and so should babies and young kids.
What happens. Regular bone and tooth are composed of Ca10(PO4)6(OH) calcium hydroxyapatite, the PO+OH part is highly degradable by acid.
The bacteria that produces acid (especially in the presence of sugar) lives at tooth contacts and between the teeth (you floss so you get rid of it, don’t you). Fluoride is more attractive to the Ca10(PO4)6(OH)10th and therefore intrauterine in the embryonic stage and therefore developing stage of primary teeth and better at 0 to 6 years of age, when most of the crowns of permanent teeth are formed – in the presence of .7 pp fluoride 10th will replace PO4OH resulting in Ca10(PO4)6(OH)2-x Fx, or fluorohydroxyapatite which is 100 times more resistant to acid degeneration and sometimes Ca10(PO4) Fx is formed, which is even more resistant to streptococcus mutans acid denaturization and (therefore a hole develops in tooth at contact point 99%). So that’s why after 1949 in Brantford, Ontario, Canada when the first fluoridation occurred, many baby boomers have no cavities. 50% of Canadian public water systems are fluoridated. I know Simcoe/Hagersville/Caledonia/Cayuga are fluoridated. I don’t know about the other communities.
The unfortunate part is what about the other 50% and rural that are not exposed to fluoride at the bone tooth developing stage. Well, only outside topical fluoride professionally and in toothpaste remains.
So instead of the complete tooth having fluoride, topical just shellacs the surface. Now the concentration instead of .7 ppm has to be 1500 ppm. Not near as good or effective, but better than nothing.
Recently a new combination of silver diamine and fluoride has been shown to be the most effective, but it stains teeth. So use on posterior teeth only and mostly on disabled or senior citizens, on the root surface of the teeth.
I have instructed people to do all oral hygiene in the shower or the tub. Remember I said strep mutans live at the contact points and between the teeth. 99% of tooth decay occurs between the teeth, so brush on fluoridated toothpaste and floss it into your teeth and also push it in with iodine toothpicks.
Any questions ask our hygienists Jodie or Ashley, they are experts at prevention.
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