Fluoride uptake from a composite restorative by enamel.
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.
Temin
S C
SC
Csuros
Z
Z
Mellberg
J R
JR
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
D003188:Composite Resins; D005459:Fluorides