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.