title: Fluoride concentration in plaque adjacent to orthodontic appliances retained with glass ionomer cement.
abstract: The fluoride concentrations in dental plaque adjacent to orthodontic brackets retained with a glass ionomer cement (GIC) or a resin-based composite were investigated using the split-mouth technique. 48-hour plaque was collected at 3, 8, 28 days and 6 months after the onset of orthodontic treatment. The fluoride content of the plaque samples was determined after a microdiffusion procedure with a fluoride-sensitive electrode. Significantly (p < 0.001-0.05) elevated concentrations of fluoride were found in the plaque samples collected adjacent to GIC-retained brackets compared to plaque sampled from composite-retained brackets on all sampling occasions. The results suggest that GIC-bonded brackets in orthodontic treatment may act as local long-term fluoride-releasing devices.
authors.affiliation: Department of Orthodontics, Medical and Dental Health Center, Halmstad, Sweden.
authors.forename: A
authors.initials: A
authors.lastname: Hallgren
authors.forename: A
authors.initials: A
authors.lastname: Oliveby
authors.forename: S
authors.initials: S
authors.lastname: Twetman
mesh_terms: D000180:Acrylic Resins; D000293:Adolescent; D000328:Adult; D017438:Bisphenol A-Glycidyl Methacrylate; D002648:Child; D001840:Dental Bonding; D003731:Dental Caries / Q000209:etiology / Q000517:prevention & control*; D003773:Dental Plaque / Q000737:chemistry*; D005260:Female; D005459:Fluorides / Q000493:pharmacokinetics*; D005899:Glass Ionomer Cements; D006801:Humans; D008297:Male; D016910:Orthodontic Brackets / Q000009:adverse effects
chemical_list: D000180:Acrylic Resins; D005899:Glass Ionomer Cements; C045751:Aqua-cem; D017438:Bisphenol A-Glycidyl Methacrylate; D005459:Fluorides