Novel Fe2O3-Containing Glass Ionomer Cements: Glass Characterisation
Glass-ionomer cements (GIC) have been used in dentistry for over 30 years. In the past ten years they have also been developed for use as medical grade bone cements. However, concerns have been raised over the biocompatibility of GIC’s in non-dental applications. The release of Al3+ ions from the cement has been related to localized poor bone mineralisation and neurotoxicity. There is a need therefore to develop Al2O3-free cements. One potential route is the substitution of Al2O3 with Fe2O3 in the glass. An Fe2O3-based glass for use in GIC‘s was fabricated. The glass was found to differ considerably compared to the traditional amorphous Al2O3-based glasses. XRD demonstrated a highly crystalline morphology containing magnetite and apatite which was confirmed using electron microscopy. It was predicted that the reduction in Al concentration in the glass would improve the biocompatibility of the resulting cement.
Panjian Li, Kai Zhang and Clifford W. Colwell, Jr.
K. Hurrell-Gillingham et al., "Novel Fe2O3-Containing Glass Ionomer Cements: Glass Characterisation", Key Engineering Materials, Vols. 284-286, pp. 799-802, 2005