ESCA-Analysis of tin compounds on the surface of hydroxyapatite |
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| Authors: | Karin Schenk-Meuser H. Duschner |
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| Affiliation: | Medical Faculty, University of Mainz, Obere Zahlbacher Strasse 63, D-55101 Mainz, Germany, DE
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| Abstract: | The formation of tin compounds on the surface of hydroxyapatite, the main crystalline component of teeth, is discussed controversially. SnF2 is used as an anticaries agent in toothpaste preparations. Pure hydroxyapatite (HAP) is treated with extracts of commercially available toothpastes containing tin fluoride and analyzed by electron spectroscopy (ESCA). Survey spectra and depth profiles are recorded. The chemical shifts measured for the HAP samples are compared with those of standard tin compounds. It is concluded that on the surface of hydroxyapatite a mixture of two-valent fluoro-phosphato compounds is formed. SnO is not found in the mixture. |
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