Amalgam vs. sealants.
D003723:Dental Amalgam; D003731:Dental Caries / Q000517:prevention & control* / Q000628:therapy; D003793:Dental Restoration, Permanent; D006801:Humans; D010895:Pit and Fissure Sealants / Q000627:therapeutic use*
D010895:Pit and Fissure Sealants; D003723:Dental Amalgam