HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Figures Only Full Text Full Text (PDF) Services Similar articles in this journal Similar articles in ISI Web of Science Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (5) Citing Articles via Google Scholar Google Scholar Articles by Vieira, A. Articles by Grynpas, M. Search for Related Content PubMed PubMed Citation Articles by Vieira, A. Articles by Grynpas, M.

How Does Fluoride Concentration in the Tooth Affect Apatite Crystal Size?

¹ Faculty of Dentistry, University of Toronto;
² Samuel Lunenfeld Research Institute, Mount Sinai Hospital, 600 University Avenue, Room 840, Toronto, ON M5G 1X5, Canada;
³ Department of Chemical Engineering and Applied Chemistry, University of Toronto;
⁴ Department of Dentistry, Sir Mortimer B. Davis-Jewish General Hospital; and
⁵ Faculty of Dentistry, McGill University;

^* corresponding author, grynpas{at}mshri.on.ca

Despite fluoride’s (F) well-documented ability to prevent caries, the effects of F concentrations on enamel and dentin apatite crystals are unknown. The present study examined the hypothesis that tooth F concentration and tooth crystallite size correlate. One hundred human unerupted third molars were studied—53 from Fortaleza-Brazil (F water 0.7 ppm), 23 from Toronto (1.0 ppm), and 24 from Montreal (0.2 ppm). F concentration was analyzed by Neutron Activation Analysis and apatite crystal size by powder x-ray diffraction. A positive correlation between dentin F concentration and enamel crystallite length and width was found. Enamel crystallite length was significantly greater in teeth from Fortaleza than in teeth from Toronto (p = 0.011) and Montreal (p = 0.003). Enamel crystallite widths were significantly greater in Fortaleza teeth compared with those from Toronto (p = 0.020) and Montreal (p < 0.001). No difference in the dentin crystallite size was seen in the 3 regions. Thus, tooth F concentration and crystallite size correlate.

KEY WORDS: fluoride • crystallite size • dentin • enamel • human

This article has been cited by other articles:

				A. Vieira, R. Hancock, M. Dumitriu, M. Schwartz, H. Limeback, and M. Grynpas How Does Fluoride Affect Dentin Microhardness and Mineralization? J. Dent. Res., October 1, 2005; 84(10): 951 - 957. [Abstract] [Full Text] [PDF]