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Crystallographic Structure of Enamel Surfaces Treated with Topical Fluoride Agents: TEM and XRD Considerations
D.G.A. Nelson
Laboratory for Materia Technica
W.L. Jongebloed
Centre for Medical Electron Microscopy, State University of Groningen, The Netherlands
J. Arends
Laboratory for Materia Technica
The crystallographic structure of surface coatings produced by three topical fluoride agents deposited by a single application on intact human enamel surfaces was investigated by light- and dark-field transmission electron microscopy, as well as by electron and x-ray diffraction. The agents studied were an acidic silane fluoride lacquer, a neutral NaF lacquer, and an APF gel. The smallest coherently diffracting particles were CaF2 microcrystallites 4-15 nm in diameter. Large apatite-like crystals, approximately I µm in length, were also observed in the outer surface coating produced by the silane fluoride lacquer.
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Journal of Dental Research, Vol. 63, No. 1,
6-12 (1984)
DOI: 10.1177/00220345840630011501
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