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  • Title: Fluoride concentration in plaque adjacent to orthodontic appliances retained with glass ionomer cement.
    Author: Hallgren A, Oliveby A, Twetman S.
    Journal: Caries Res; 1993; 27(1):51-4. PubMed ID: 8448774.
    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.
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