title: Fluoride uptake from a composite restorative by enamel.
abstract: The purpose of the study was to determine the in vitro uptake of fluoride by enamel adjacent to a fluoride-releasing composite restorative material containing 11.2 mg/g of fluoride. Blocks of human enamel were placed close to cured discs of the composite in synthetic saliva for periods of up to 24 hours. The fluoride content of successive acid-etch biopsy layers of the enamel blocks was determined by specific ion-electrode analysis, and atomic absorption analysis for calcium was used to determine the layer thickness. After 24 hours, a fluoride content of 5400 ppm was found for the outermost 10-micron layer of enamel. Based on the in vitro demonstration of appreciable fluoride uptake by adjacent enamel, the fluoride-releasing composite gives promise of having anticariogenic properties in vivo.
authors.forename: S C
authors.initials: SC
authors.lastname: Temin
authors.forename: Z
authors.initials: Z
authors.lastname: Csuros
authors.forename: J R
authors.initials: JR
authors.lastname: Mellberg
mesh_terms: D000042:Absorption; D003188:Composite Resins; D003743:Dental Enamel / Q000378:metabolism*; D003799:Dental Stress Analysis; D005459:Fluorides / Q000493:pharmacokinetics*; D006244:Hardness; D006801:Humans; D013718:Tensile Strength
chemical_list: D003188:Composite Resins; D005459:Fluorides