"The evidence is very clear that both fluoride & mercury are toxic to humans." That is a half truth in large amounts it is toxic and only systematically. Fluoride applied at dentist are topical just as are toothpaste, meaning not to ingest. Alchol is also toxic but we drink it ? To much will kill us but also has medicinal benefits, why aren't you taking on that?

Where did this person in your village gain his information about dentistry?

I read numerous articles and I am proof of fact amalgam lasts longer. I have different types of fillings in my mouth yet the amalgam are best shape where composite has fractured and needs to be fixed after 3 years.

Have u observed physiological process with microscope that takes place once fluoride is applied to a tooth.

And why whould I use fluoride and keep using fluoride toothpaste as oral health care worker? I have nothing to gain exept healthy teeth!