Paper Titles
Potential Applications of Glass and Glass-Ceramics Based on Lithium Disilicate as Biomaterials
p.273
Double-Layer Bioactive Glass Coatings Obtained by Pulsed Laser Deposition
p.277
The Effect of Sodium Dopants on Calcium Polyphosphate Biomaterials
p.281
Fabrication of Hierarchically Porous Bioactive Glass Ceramics
p.285
Tailoring Mechanical Behavior of PVA-Bioactive Glass Hybrid Foams
p.289
Controlling the Reactivity of Calcium Phosphate Cements
p.295
Parameters Influencing the Properties of Calcium Phosphate Cements
p.299
Calcium Phosphate Cement (CPC): A Critical Development Path
p.303
Effect of Mechanical Mixing and Powder to Liquid Ratio on the Strength and Reliability of a Brushite Bone Cement
p.307

Tailoring Mechanical Behavior of PVA-Bioactive Glass Hybrid Foams

Article Preview

Abstract:

Porous scaffolds have been developed in many forms and materials, but few have reached the combination of adequate physical, biological and mechanical properties. In previous works hybrid foams bioactive glass polyvinyl alcohol (PVA) were prepared by the sol-gel process for application as scaffold for bone tissue engineering. We observed that synthesis parameters such as PVA hydrolysis grade, PVA solution concentration, and PVA content in the hybrids affected both synthesis results and structural characteristics of the obtained foams. A marked change in foaming behavior occurs for PVA contents around 60%. In this work we analyze the effect of different compositions and synthesis parameters on the mechanical behavior of PVA-bioative glass foams. The compression tests showed that an increase of PVA fraction changes the mechanical behavior due to different mechanisms leading to cell collapse. For hybrids with lower PVA contents (20 to 30%) the cell collapse is due to brittle crushing. For intermediate polymer content (40-60%) the contribution of plastic yielding in the plateau region increases and it becomes the predominant mechanism of cell collapse for samples with higher polymer content (70-80%).

You might also be interested in these eBooks
Bioceramics 20 View Preview

Info:

Periodical:

Key Engineering Materials (Volumes 361-363)

Pages:

289-292

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.361-363.289

Citation:

Cite this paper

Online since:

November 2007

Authors:

Hermes S. Costa, Agda Aline Rocha de Oliveira, R.L. Oréfice, Herman S. Mansur, Marivalda Pereira

Keywords:

Bioactive Glass, Foam, Hybrid, Mechanical Behavior, PVA

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

© 2008 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

References

[1] V. Olivier, N. Faucheux, P. Hardouin: Drug Discovery Today Vol. 9 (2004), p.803.

Google Scholar

[2] K. Rezwan, Q.Z. Chen, J.J. Blaker, A.B. Boccaccini: Biomaterials Vol. 27 (2006), p.3413.

Google Scholar

[3] E. Chiellini, A. Corti, S. D'antone, R. Solaro: Progress in Polymer Science Vol. 28 (2003), p.963.

Google Scholar

[4] H.S. Mansur, R.L. Oréfice, A.A.P. Mansur: Polymer Vol. 45 (2004), p.7193.

Google Scholar

[5] M.M. Pereira, J. Jones, L. Hench: Advances in Applied Ceramics Vol. 104 (2005), p.35.

Google Scholar

[6] M.M. Pereira, J.R. Jones, R.L. Orefice, L.L. Hench: Journal of Materials Science: Materials in Medicine Vol. 16 (2005), p.1045.

Google Scholar

[7] V.C. Costa, H.S. Costa, W.L. Vasconcelos, W.L., M.M. Pereira, R.L. Orefice, H.S. Mansur: Materials Research Vol. 10 (2007), p.677.

Google Scholar

[8] L. J. Gibson: Biomechanics of cellular solids, Journal of Biomechanics, Vol. 38 (2005), p.377.

Google Scholar