oops maybe I got the spelling wrong, we do spell things differently here, but I must admit I was not sure on it, yes it is mercury, I would imagine it was used in US too, when I was a child, the dental nurses had a quota to fill and can you believe this they drilled our teeth and filled them with mercury when they did not even need it, and this is a fact, we should be suing them for this,for all I know my health problems could be down to this, alot of people have had their mercury fillings removed and have had improved health since, its just a poison.

P.S if your'e fillings a black I would imagine they are amalgam.