You wanted to know also the different types of dental fillings. Generally you have mercury-silver dental amalgams, gold alloys, composite resins, and porcelain fillings. Of the those groups, there are many varieties. There may be other types of fillings too. Since it has been reported that less and less people want the gray-black mercury-silver metal fillings, there are many alternative fillings be developed and used.
Oh, I should add that nickel and tin might also be in the amalgam mixture. I hope that helps.