title: Fluorine and tin uptake by enamel studied by x-ray photoelectron spectroscopy (ESCA).
abstract: ESCA has been combined with argon-ion etching to obtain depth profiles for SnF2-treated enamel. Three zones of products from the topical treatment are detected: a layer of tin oxide on the surface; fluoroapatite + hydroxyapatite at depths below about 0.2 micron; an intermediate layer CaF2, Sn(OH)2, Sn2PO4OH, and fluoroapatite between the two. Sn3F3PO4 was not detected.
mesh_terms: D001128:Argon; D002118:Calcium / Q000032:analysis; D055598:Chemical Phenomena; D002621:Chemistry; D003743:Dental Enamel / Q000032:analysis / Q000378:metabolism* / Q000648:ultrastructure; D005459:Fluorides / Q000378:metabolism*; D005460:Fluorides, Topical / Q000378:metabolism*; D005461:Fluorine / Q000032:analysis / Q000378:metabolism; D006801:Humans; D010758:Phosphorus / Q000032:analysis; D013052:Spectrometry, X-Ray Emission; D014001:Tin / Q000032:analysis / Q000378:metabolism; D014002:Tin Fluorides / Q000378:metabolism*
chemical_list: D005460:Fluorides, Topical; D014002:Tin Fluorides; D010758:Phosphorus; D005461:Fluorine; D001128:Argon; D014001:Tin; D005459:Fluorides; D002118:Calcium