The well meaning dental industry is polluting your mouth and your whole body as well. Mercury was and is still being used by some dentists as amalgam / silver tooth fillings. Mercury may well be one of the most toxic substances on earth.
Dentists will tell you to flouridate your teeth or drink flouride water. Yet flouride is a poison!
Dentists want you to get root canals. Your tooth is dead yest he wants it still stuck to your jaw. Dead teeth need extracting.