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Oral Health and Preventive Dentistry
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Oral Health Prev Dent 10 (2012), No. 1     16. Apr. 2012
Oral Health Prev Dent 10 (2012), No. 1  (16.04.2012)

Page 59-64, doi:10.3290/j.ohpd.a25699, PubMed:22908089


Effect of Fluoride Dentifrices on the Microhardness of Deciduous Enamel Surfaces
Shabanian, Mitra / Jabarifar, Seyed Ebrahim / Salavati, Shirin / Khosravi, Kazem / Tavakoli, N. / Akhavan, Ali
Purpose: To evaluate the changes in the enamel surface microhardness following the application of various suspensions of Crest and Pooneh toothpastes with and without fluoride.
Materials and Methods: Fifty-six enamel blocks of primary incisors were exposed to a pH-cycling regime consisting of demineralisation and remineralisation solution, then suspensions of the dentifrices Crest 1100, Crest 500, Pooneh 500, Pooneh without fluoride. Changes of the enamel surface microhardness in pre-demineralisation (initial), post-demineralisation (demineralised) and post-remineralisation (final) stages were measured for four groups and were analysed using the Student t test and one-way ANOVA.
Results: The percentages of changes in surface microhardness for Crest 1100, Crest 500, Pooneh 500 and Pooneh without fluoride were 45.4, 35.4, 28.6 and 23.7, respectively.
Conclusion: Average changes of surface microhardness for Crest 1100 were significantly higher than Crest 500, Pooneh 500 and Pooneh without fluoride.

Keywords: dentifrice, fluoride, microhardness, pH cycling, re/demineralisation