Gold foil.
D003737:Dental Cavity Preparation / Q000379:methods; D003793:Dental Restoration, Permanent / Q000266:history* / Q000379:methods; D003814:Dentistry, Operative / Q000266:history; D006047:Gold Alloys; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans
D006047:Gold Alloys