The use of dental amalgam--an art or a science?

Dental amalgam remains the best material for filling teeth when aesthetics are of secondary importance. Over the last 20 years improvements in the composition have reduced marginal failure due to creep and corrosion, and the use of modern adhesives has lead to an early seal between the tooth and the filling. However, the proper handling by the dentists remains as the cornerstone for fillings that are going to last. This article describes the history, classification, structure and handling variables of dental amalgams. It also discusses the effects of extra elements, bonding agents and the possible hazard of mercury.