银汞合金为牙科龋病应用最广的后牙充填材料.60年代以来国外对合金的组成、制造工艺均有重大改进,如球形合金粉.70年代牙用汞合金倾向于高铜化,如Tronstsd等证实高铜合金细胞毒性最小,已在牙科修复及根管倒充中广泛应用.国外低铜车屑状合金趋于淘汰,而国内至今仍停留于旧的生产工艺和配方上.为此,我院与冶金工业部昆明 Silver amalgam dental caries for the most widely used dental filling material since the 1960s foreign alloy composition, manufacturing processes have greatly improved, such as spherical alloy powder dental amalgam tend to high copper 70, such as Tronstsd and other high copper alloy confirmed the smallest cytotoxicity, has been widely used in dental restorations and root canal filling. Foreign low-carbon car scrap alloy tends to be eliminated, but the country still remain in the old production processes and formulations. , Our hospital and the Ministry of Metallurgical Industry Kunming