title: Radiolucent halos associated with radiopaque composite resin restorations.
abstract: Since the introduction of radiopaque composite resins, clinicians and researchers have occasionally noticed radiolucent halos adjacent to composite restorations. Such halos have frequently been thought to be recurrent caries or voids in the material. Fifteen of 45 radiopaque composite resin restorations placed by students enrolled in a first-year preclinical operative dentistry course exhibited such halos. Micrographs showed that a thick layer of unfilled resin bonding agent was present. These halos were reproduced in other teeth when excess bonding was not blown off. The results indicate the importance of meticulous technique.
authors.affiliation: Department of Oral Health Practice, University of Kentucky, College of Dentistry, Chandler Medical Center, Lexington 40536-0084.
authors.forename: J D
authors.initials: JD
authors.lastname: Hardison
authors.forename: D
authors.initials: D
authors.lastname: Rafferty-Parker
authors.forename: R J
authors.initials: RJ
authors.lastname: Mitchell
authors.forename: L R
authors.initials: LR
authors.lastname: Bean
mesh_terms: D000269:Adhesives; D003188:Composite Resins; D003287:Contrast Media; D001840:Dental Bonding; D003743:Dental Enamel / Q000000981:diagnostic imaging; D003793:Dental Restoration, Permanent; D006801:Humans; D011861:Radiography, Dental
chemical_list: D000269:Adhesives; D003188:Composite Resins; D003287:Contrast Media