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Simple methods to fabricate Bioglass®-derived glass–ceramic scaffolds exhibiting porosity gradient

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Abstract

The present paper discusses different processing technologies for fabrication of novel 45S5 Bioglass®-derived glass–ceramic scaffolds with tailored porosity gradient for potential application in bone tissue engineering. Different types of scaffolds with continuous or stepwise gradient of porosity were produced by the foam replication technique, using preformed polyurethane (PU) foams as sacrificial templates. After preforming the PU foams in metallic moulds, they were dipped in a 45S5 Bioglass®-based slurry and subsequently heat treated in a chamber furnace up to 1100 °C. During heating, the organic phase is burned out and the glass sinters and partially crystallises. By using this new approach, Bioglass®-derived glass-ceramic scaffolds with different shapes and porosity profiles were designed. Scanning electron microscopy (SEM) showed that all samples have highly interconnected porous structure, with specific porosity gradients. By modifying the shape and dimensions of the metallic mould, bioactive glass–ceramic scaffolds with complex shapes and different degrees of porosity gradient could be obtained.

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Acknowledgements

This work was funded with support of the EU Marie Curie fellowship scheme (Grant MEIF-CT-2005-024248).

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Authors and Affiliations

  1. Department of Materials, Imperial College London, Prince Consort Road, London, SW7 2BP, UK

    Oana Bretcanu, Claire Samaille & Aldo R. Boccaccini

Authors
  1. Oana Bretcanu
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  2. Claire Samaille
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  3. Aldo R. Boccaccini
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Corresponding authors

Correspondence to Oana Bretcanu or Aldo R. Boccaccini.

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Bretcanu, O., Samaille, C. & Boccaccini, A.R. Simple methods to fabricate Bioglass®-derived glass–ceramic scaffolds exhibiting porosity gradient. J Mater Sci 43, 4127–4134 (2008). https://doi.org/10.1007/s10853-008-2536-y

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  • DOI: https://doi.org/10.1007/s10853-008-2536-y

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