Abstract
This research work is focused on the preparation of macroporous glass-ceramic scaffolds with high mechanical strength, equivalent with cancellous bone. The scaffolds were prepared using an open-cells polyurethane sponge as a template and glass powders belonging to the system SiO2–P2O5–CaO–MgO–Na2O–K2O. The glass, named as CEL2, was synthesized by a conventional melting-quenching route, ground and sieved to obtain powders of specific size. A slurry of CEL2 powders, polyvinyl alcohol (PVA) as a binder and water was prepared in order to coat, by a process of impregnation, the polymeric template. A thermal treatment was then used to remove the sponge and to sinter the glass powders, in order to obtain a replica of the template structure. The scaffolds were characterized by means of X-ray diffraction analysis, morphological observations, density measurements, volumetric shrinkage, image analysis, capillarity tests, mechanical tests and in vitro bioactivity evaluation.
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Acknowledgement
The authors wish to acknowledge the EU Network of Excellence project “Knowledge-based Multicomponent Materials for Durable and Safe Performance” (KMM-NoE, NMP3-CT-2004-502243).
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Vitale-Brovarone, C., Baino, F. & Verné, E. High strength bioactive glass-ceramic scaffolds for bone regeneration. J Mater Sci: Mater Med 20, 643–653 (2009). https://doi.org/10.1007/s10856-008-3605-0
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DOI: https://doi.org/10.1007/s10856-008-3605-0