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International Journal of Dentistry
Volume 2014, Article ID 463149, 7 pages
Research Article

Effects of Ion-Releasing Tooth-Coating Material on Demineralization of Bovine Tooth Enamel

Preventive and Community Dentistry, Osaka Dental University, 8-1 Kuzuha Hanazono, Hirakata, Osaka 573-1121, Japan

Received 4 July 2013; Revised 26 October 2013; Accepted 29 October 2013; Published 21 January 2014

Academic Editor: Adriana Modesto Vieira

Copyright © 2014 Koji Kawasaki and Masaki Kambara. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


We compared the effect of a novel ion-releasing tooth-coating material that contained S-PRG (surface-reaction type prereacted glass-ionomer) filler to that of non-S-PRG filler and nail varnish on the demineralization of bovine enamel subsurface lesions. The demineralization process of bovine enamel was examined using quantitative light-induced fluorescence (QLF) and electron probe microanalyzer (EPMA) measurement. Ion concentrations in demineralizing solution were measured using inductively coupled plasma atomic (ICP) emission spectrometry and an ion electrode. The nail varnish group and the non-S-PRG filler group showed linear demineralization. Although the nail varnish group and the non-S-PRG filler group showed linear demineralization, the S-PRG filler group did not. Further, plane-scanning by EPMA analysis in the S-PRG filler group showed no changes in Ca ion distribution, and F ions showed peak levels on the surface of enamel specimens. Most ions in the demineralizing solution were present at higher concentrations in the S-PRG filler group than in the other two groups. In conclusion, only the S-PRG filler-containing tooth-coating material released ions and inhibited demineralization around the coating.