Yes, we do have an individual with dental experience in our ecovillage.
There is extensive evidence that mercury is toxic to humans, and at very low levels, and there's no question that mercury is used in amalgams.
Fluoride is another topic in itself. Avoiding it in this day and age is not as simple as to stop drinking tea, and it's important to know the side effects of consumption and then question WHY "authorities" would not only use this substance in the first place, but put it in municipal drinking water without citizen consent.
I don't support fluoridation but that is systematical intake. Your post is about topical application!
Our post is about mercury, specifically in fillings. Did you read this?
They dont use fluoride in the water in PA anymore .... Now the kids take multivitamins with fluoride added or have floride given to them in school or at the dentist PLUS what is in toothpaste..