Copper-rich and conventional amalgam restorations after clinical use.
The comparison of clinically retrieved conventional and copper-rich amalgam restorations demonstrated that there are at least two distinct types of compounds that form in vivo in amalgam restorations, tin-rich layers on the exposed surface of many amalgams and tin-chlorine and smaller amounts of stannous oxide products in the interior. In the systems rich in copper, corrosion was confined to the surface and a few isolated areas. The relatively small changes found in the systems rich in copper could account for the superior marginal integrity reported for copper-rich amalgams in clinical trials.
D055598:Chemical Phenomena; D002627:Chemistry, Physical; D002713:Chlorine / Q000032:analysis; D003300:Copper / Q000032:analysis; D003723:Dental Amalgam / Q000032:analysis; D003793:Dental Restoration, Permanent; D008628:Mercury; D010100:Oxygen; D012834:Silver; D013499:Surface Properties; D014001:Tin / Q000032:analysis
D012834:Silver; D002713:Chlorine; D014001:Tin; D003300:Copper; D003723:Dental Amalgam; D008628:Mercury; D010100:Oxygen