Dental fillings. The silver in them thar molars.
D017076:Computer-Aided Design; D003723:Dental Amalgam; D003731:Dental Caries / Q000628:therapy*; D003776:Dental Porcelain; D019232:Dental Restoration Failure; D003793:Dental Restoration, Permanent; D006801:Humans; D012117:Resins, Synthetic
D012117:Resins, Synthetic; D003776:Dental Porcelain; D003723:Dental Amalgam