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 they contain Bis-phenol A (BPA) a chemical known to cause reproductive toxicity at high doses. In Canada, amalgam use is considered safe and effective. A 2005 position statement from the Canadian Dental Association (CDA) states that "current scientific evidence on the use of dental amalgam supports that amalgam is an effective and safe filling material that provides a long-lasting solution for a broad range of clinical situations. The CDA has established its position based on the current consensus of scientific and clinical experts and on recent extensive reviews of strong evidence by major North American and international organizations, which have