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Journal of Dental Research
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Biomaterials & Bioengineering

Infrared Spectrometric Study of Acid-degradable Glasses

E.A.P. De Maeyer1, R.M.H. Verbeeck2 and C.W.J. Vercruysse

Department of Dental Materials Science, Institute for Biomedical Technologies (IBITECH), Ghent University, De Pintelaan 185 (P8), B-9000 Ghent, Belgium;
1 Senior Research Assistant of the FSR-Flanders (Belgium);

Correspondence: 2 corresponding author, ronald.verbeeck{at}rug.ac.be

The composition of glasses used in glass-ionomer cements affects their leaching behavior and hence the properties of the cement. The aim of this study was to correlate the composition and leaching behavior of these glasses with their infrared absorption characteristics. The wavenumber of the absorption band of the Si-O asymmetric stretching vibration FormulaAS shifts to a higher value with decreasing content of mono- and bivalent cations in the glass. This effect can be ascribed to the influence of these extraneous ions on the glass network order and connectivity. Preferential leaching of these ions induces an increase of FormulaAS and a general modification of the band profile. The results can be correlated with the x-ray diffraction characteristics of the glass.

Key Words: acid-degradable glasses • glass-ionomer cements • infrared spectroscopy • glass composition • leaching

Journal of Dental Research, Vol. 81, No. 8, 552-555 (2002)
DOI: 10.1177/154405910208100810
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