title: Radiopacity of resin-modified glass-ionomer restorative cements.
abstract: This in vitro study compared the relative radiopacities of three commercially available resin-modified glass-ionomer cements (Vitremer, Fuji II LC, and Photac-Fil), an experimental resin-modified glass-ionomer (V-66), two conventional glass-ionomers (ChemFil and Fuji Cap II), and amalgam (as the control). Radiopacity was assessed densitometrically and expressed as equivalent thicknesses of aluminum. All the glass-ionomer cements were more radiopaque than enamel and dentin, with the exception of ChemFil and Photac-Fil. Apart from the control material, the experimental resin-modified glass-ionomer material, V-66, had the highest radiopacity of all the materials tested. Of the three resin-modified glass-ionomer materials tested, Fuji II LC was the most radiopaque and Photac-Fil the least. For the radiopacity of restorative glass-ionomer materials to exceed that of enamel, it should be greater than 1.5 mm of equivalent thickness of aluminum.
authors.affiliation: Department of Conservative Dentistry, United Medical and Dental Schools, Guy's Hospital, London, England.
authors.forename: S K
authors.initials: SK
authors.lastname: Sidhu
authors.forename: P M
authors.initials: PM
authors.lastname: Shah
authors.forename: B S
authors.initials: BS
authors.lastname: Chong
authors.forename: T R
authors.initials: TR
authors.lastname: Pitt Ford
mesh_terms: D015502:Absorptiometry, Photon; D003287:Contrast Media; D003723:Dental Amalgam; D003743:Dental Enamel / Q000000981:diagnostic imaging; D003804:Dentin / Q000000981:diagnostic imaging; D005899:Glass Ionomer Cements; D006801:Humans; D011861:Radiography, Dental; D019279:Resin Cements; D018709:Statistics, Nonparametric
chemical_list: D003287:Contrast Media; D005899:Glass Ionomer Cements; D019279:Resin Cements; D003723:Dental Amalgam