andyh wrote:
dogsmilk wrote:
I think I may have misunderstood what you meant by "topical" Andy. But yes you've linked to something that is strongly arguing flouride in water combats tooth decay. The text is full of claims it does. The ingestion is incidental., it argues the act of ingesting it does help though. Weirdly, I've always been kinda sceptical of that idea myself. I always thought not spitting out toothpaste straight away is better than water passing over your teeth rapidly, but you have linked to something that contradicts that notion.
There's only 2 possible ways ingestion could 'help' as such.
1) With teeth that are in the process of growing.
2) With the body excreting ingested fluoride in saliva.
There is nothing that magically passes fluoride in to your teeth otherwise and ofc no mention of why we use pea sized amounts and discourage swallowing with children brushing their teeth and no mention of any affects it might be having on old people who have no teeth

Well what you linked to claimed
Featherstone makes it clear, as he has in other publications, that fluoride
incorporated during tooth development is insufficient to play a significant
role in caries protection. He cites, as an example of the weak pre-eruptive
effects of fluoride, a study of two groups of Okinawa nursing students
which showed that there was no difference in caries status between those
who had received fluoridated water only until about 5 to 8 years of age (and none
thereafter) and those who had never received fluoridated drinking water.
Whether that singular claim is correct or not I do not know. It does contradict what it generally said about children's teeth improving with flouride, including the multiple studies referenced on the page you linked to. But note it's specifying tooth development. Oddly you've just contradicted a claim on anoither page you've linked to.
But it's commonly claimed/.understood flouride inhibits the formation of bacteria on the teeth and strengthens tooth enamel. We do not need to "excrete" it. Indeed, I fail to see why it matters if flouride is present in the saliva or present because it was put there. If it's there, it's there. Or what am I missing. I'm a bit tired now.
LOL. how the fuck did I end up talking about this? Man, the shit you find youreslf getting into on the internet...