title: Linings and caries in retrieved permanent teeth with amalgam restorations.
abstract: Possible correlations between the presence or position of cavity linings and the incidence of caries were studied in a sample of 57 extracted permanent teeth with amalgam fillings. Linings could be detected if their thickness was greater than approximately 20 microns, and if they were observed on 74% of the teeth. On 53% of the teeth caries were found adjacent to the restorations, and on 11% not adjacent to the restorations. The incidence of adjacent caries on the teeth with lined cavities was not lower than on the unlined ones. In 36% of the teeth with linings, evidence was found for washout of linings which had been present at the cavosurface margin. These teeth showed a significantly higher incidence of adjacent caries than the unlined ones. Carious sites associated with washout of linings were found in 31% of the lined specimens.
authors.forename: D
authors.initials: D
authors.lastname: Novickas
authors.forename: V L
authors.initials: VL
authors.lastname: Fiocca
authors.forename: R
authors.initials: R
authors.lastname: Grajower
mesh_terms: D003723:Dental Amalgam; D003731:Dental Caries / Q000453:epidemiology*; D003736:Dental Cavity Lining / Q000009:adverse effects; D003793:Dental Restoration, Permanent / Q000009:adverse effects / Q000379:methods*; D006801:Humans
chemical_list: D003723:Dental Amalgam