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Revista de Odontologia da UNESP

On-line version ISSN 1807-2577


PUPO, Yasmine Mendes et al. Evaluation of the fluoride release and ability to recharge in different glass ionomer cements. Rev. odontol. UNESP [online]. 2015, vol.44, n.2, pp.80-84. ISSN 1807-2577.


To evaluated the ability to fluoride release and recharge in the different glass ionomer cements during simulation of cariogenic challenge.

Material and method

Twelve samples were made for each experimental group: conventional glass ionomer cements, Maxxion R (FGM), Ketac Molar EasyMix (3M ESPE); resin modified glass ionomer cement, Vitrebond (3M ESPE); and composite resin Filtek™ Z350XT (3M ESPE), negative control. The samples were immersed alternately in pH cycling method, remaining 6 hours in demineralization solution and 18 hours in remineralization solution and maintained at 37 °C. Fluoride release was measured 1, 2, 7, and 14 days before and after recharging with specific electrode coupled to the analyzer apparatus pH/fluoride, each measurement with calibrated solutions of sodium fluoride to 1 and 10 ppm, prepared with TISAB II. For reading was added 0.5 mL of sample to an equal volume of TISAB II. Recharging was made with neutral sodium fluoride to 2% for 4 minutes in the samples, washed and again immersed pH cycling solutions. Data were subjected to two-way ANOVA and Tukey’s post-hoc test (α = 0.05).


The initial fluoride release (μgF/cm2) was 45.36 ; 37.49 and 26.35 for Maxxion R, Vitrebond and Ketac Molar EasyMix, respectively. Significant differences between the materials before and after recharging were observed (p=0.001). After topical application of fluoride, both showed ability to recharge.


The glass ionomer cements evaluated were capable of releasing fluoride in pH cycling solutions and may recharge through of a topical application.

Keywords : Glass ionomer cements; demineralization; fluorine; sodium fluoride.

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