There is excellent information about dental amalgams (mercury poisoing) on the International Academy of Oral Medicine and Toxicology’s website.
From their video library (with thanks to Grant):
Multiple Sclerosis from Mercury (Silver) Fillings. Linda Brocato testifies before the FDA joint Medical/Dental panel
A google on “Brocato FDA” brings up numerous reports on the lawsuits against the FDA over its continued stance that amalgams are safe. There is all the usual corruption of the Government agency by the parties who are on the hook for the liability issues arising out of the poisoning.