A dental restoration or dental filling is a dental restorative material used to restore the function, integrity and anatomy of missing tooth structure. The structural loss typically results from caries or external trauma.
The process of preparation usually involves cutting the tooth with special dental burs, to make space for the planned restorative materials, and to remove any dental decay or portions of the tooth that are structurally unsound.
Silver filling is an alloy of mercury with various metals. It commonly consists of mercury, silver, tin, copper, and other trace metals. In the 1800s, amalgam became the dental restorative material of choice due to its low cost, ease of application, strength, and durability.