Dissolution behavior and fluoride release from new glass composition used in glass ionomer cements

The degradability in an acidic environment and the release of different ions, such as Na+, Ca2+, Al3+ and F− from a calcium fluoro-aluminosilicate glass (used in glass ionomer cements) during different exposure times at 37 °C has been the object of this study. The formation of a leached layer on the surface of the glass has proved to be an important factor in the ionic release from the glass. The structural change in the silicate network of the glass during the dissolution and formation of the leached layer on the surface of the glass has been analyzed by Fourier transform infrared (FTIR) spectrometer. The present study has investigated topographic profiles as a function of time through atomic force microscope (AFM). Also, the formation of the leached layer on the surface of the glass has been described with AFM by measuring the corrosion depth for different times of acidic treatment.