I was anti-fluoride for a long time due to fears of it accumulating in the body (specifically bones and also I was paranoid about calcification of the pineal gland). Then I found out that green tea has fluoride and it started making sense to me why so many old Chinese people had all their teeth (85+ years old). The lack of sugar in their diet and the fluoride in their tea! That's my theory at least.
Well, the breaking point was actually when my teeth started... breaking. I started using a prescription strength fluoride toothpaste 1.1%. It's about 10 times stronger than what you buy in the drug store. The instructions for that specific brand was to expectorate and not rinse after use. This was in an attempt to maximize absorption I guess.
After a year of use I noticed some changes in my teeth. Since my teenage years I've had demineralization near my gum line from improper brushing as a kid. It shows up as a brown line near my gums on all my molars. After a year of using the super fluoride toothpaste without rinsing after brushing, I noticed a new white line forming above the brown decalcified line.
The brown line didn't disappear or change and it seems it was too late for the already demineralized tooth. But it seems that the tooth above the line... the tooth structure in the process of being eroded but which hadn't yet eroded completely... was able to be "remineralized" by the fluoride and saved from further destruction.
So I'm guessing that if there is already a "crevasse" that can be found using an explorer, that fluoride would be of little use.
Also, I'm fairly certain that my pineal gland is now completely calcified, and that I may develop osteoporosis from the hardening of my bones which has likely occurred... but on the bright side I've still got a full set of teeth
