title: Comparative study of periodontal disease in relation to approximating tooth surface to filled surface of Class II silver amalgam restorations.
mesh_terms: D003723:Dental Amalgam; D003737:Dental Cavity Preparation; D003793:Dental Restoration, Permanent / Q000009:adverse effects*; D006801:Humans; D010510:Periodontal Diseases / Q000209:etiology*; D012834:Silver; D013499:Surface Properties
chemical_list: D012834:Silver; D003723:Dental Amalgam