Amalgam fillings are used to fill cavities caused by tooth decay. They are the traditional way of filling cavities and have been in use for more than 150 years now. Liquid mercury and a powdered alloy of silver, tin, and copper are mixed to obtain dental amalgam. Almost 50 percent of the amalgam’s composition is elemental mercury by weight.
Amalgam fillings are known as silver fillings because they have a silver-like appearance. Due to this silver-like appearance, the amalgam fillings are used to fill the back teeth.