Amalgam (dentistry) and for large foundation restorations, or cores, which are precursors to placing crowns. The reaction between mercury and alloy when mixed together is termed an amalgamation reaction. It will result in the formation of a silver-grey workable mass which can be condensed into cavities. After condensing, the dental amalgam is carved to generate the required anatomical features and then hardens with time. In the pre-1986, the standard composition of alloy is referred to as conventional amalgam alloy. More recently (post-1986), there have been a change in the compositional standard of the alloy due to better understanding of structure-property relationships for
Dental amalgam controversy the use of dental amalgam, but allows phasing down amalgam use over a time period appropriate to domestic needs, an approach advocated by the World Health Organization (WHO). FDI World Dental Federation recognizes the safety and effectiveness of amalgam restorations. FDI is a federation of approximately 200 national dental associations and dental specialist groups representing over 1.5 million dentists. In collaboration with the WHO, they have produced an FDI position statement and WHO consensus statement on dental amalgam. Their position regarding the safety of dental amalgam is that, aside from rare allergic reactions and local side effects, "the small amount