title: Radiopacity of glass ionomer materials.
abstract: To facilitate the detection of overhangs and defects adjacent to a filling, restorative materials should have a radiographic density higher than or at least similar to that of enamel. In the present study the density of 21 glass ionomer materials was measured and compared with the density of enamel, dentine, amalgam and aluminium. Most materials were more radiopaque than enamel, thereby satisfying the requirements as proposed by several investigators. The materials with lower density were mainly types intended for use in anterior teeth where the entire filling can more easily be examined clinically. They should not be used as a base under approximal fillings in order to avoid a false positive diagnosis of recurrent caries.
authors.affiliation: Department of Oral Radiology, University of Bergen, Norway.
authors.forename: L
authors.initials: L
authors.lastname: Skartveit
authors.forename: A
authors.initials: A
authors.lastname: Halse
mesh_terms: D000535:Aluminum / Q000737:chemistry; D003287:Contrast Media / Q000737:chemistry; D003720:Densitometry; D003723:Dental Amalgam / Q000737:chemistry; D003731:Dental Caries / Q000000981:diagnostic imaging; D003736:Dental Cavity Lining; D003743:Dental Enamel / Q000000981:diagnostic imaging; D003793:Dental Restoration, Permanent; D003804:Dentin / Q000000981:diagnostic imaging; D005189:False Positive Reactions; D005899:Glass Ionomer Cements / Q000737:chemistry*; D006801:Humans; D011859:Radiography; D012008:Recurrence
chemical_list: D003287:Contrast Media; D005899:Glass Ionomer Cements; D003723:Dental Amalgam; D000535:Aluminum