Restor Dent Endod.  2015 Aug;40(3):209-215. 10.5395/rde.2015.40.3.209.

Do conventional glass ionomer cements release more fluoride than resin-modified glass ionomer cements?

Affiliations
  • 1School of Dentistry, Federal University of Amazonas, Manaus, Brazil.
  • 2Postgraduate Program in Dentistry, School of Dentistry, Federal University of Amazonas, Manaus, Brazil. flaviacohencarneiro@gmail.com
  • 3School of Health Sciences, State University of Amazonas, Manaus, Brazil.

Abstract


OBJECTIVES
The aim of this study was to evaluate the fluoride release of conventional glass ionomer cements (GICs) and resin-modified GICs.
MATERIALS AND METHODS
The cements were grouped as follows: G1 (Vidrion R, SS White), G2 (Vitro Fil, DFL), G3 (Vitro Molar, DFL), G4 (Bioglass R, Biodinamica), and G5 (Ketac Fil, 3M ESPE), as conventional GICs, and G6 (Vitremer, 3M ESPE), G7 (Vitro Fil LC, DFL), and G8 (Resiglass, Biodinamica) as resin-modified GICs. Six specimens (8.60 mm in diameter; 1.65 mm in thickness) of each material were prepared using a stainless steel mold. The specimens were immersed in a demineralizing solution (pH 4.3) for 6 hr and a remineralizing solution (pH 7.0) for 18 hr a day. The fluoride ions were measured for 15 days. Analysis of variance (ANOVA) and Tukey's test with 5% significance were applied.
RESULTS
The highest amounts of fluoride release were found during the first 24 hr for all cements, decreasing abruptly on day 2, and reaching gradually decreasing levels on day 7. Based on these results, the decreasing scale of fluoride release was as follows: G2 > G3 > G8 = G4 = G7 > G6 = G1 > G5 (p < 0.05).
CONCLUSIONS
There were wide variations among the materials in terms of the cumulative amount of fluoride ion released, and the amount of fluoride release could not be attributed to the category of cement, that is, conventional GICs or resin-modified GICs.

Keyword

Dental materials; Fluorides; Glass ionomer cements

MeSH Terms

Dental Materials
Fluorides*
Fungi
Glass Ionomer Cements*
Glass*
Ions
Molar
Stainless Steel
Dental Materials
Fluorides
Glass Ionomer Cements
Ions
Stainless Steel
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