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Characterisation of selective laser sintered hydroxyapatite based biocomposite structures for bone replacement

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journal contribution
posted on 13.05.2009, 13:33 by L. Hao, M.M. Savalani, Y. Zhang, K.E. Tanner, Richard Heath, Russell Harris
Integration of the bone into the implant is highly desirable for the long-term performance of the implant. The development of a bone–implant interface is influenced by the surface morphology and roughness, surface wettability and porosity of the implants. This study characterizes these important properties of a hydroxyapatite-based biocomposite structure fabricated by selective laser sintering (SLS) with a comparison to a moulded specimen. The sintered specimens exhibited a rougher surface with open surface pores and a highly interconnected internal porous structure. It was shown that the characteristics of the powder particles used in the SLS provided a more influential means to modify the surface morphology and the features of the internal pores than laser parameter variation. The correlation of wettability and porous structure shows that although surface open pores could help cell ingrowth and bone regeneration, they resulted in a poorer wettability of the materials, which may not encourage initial cell attachment and adhesion. The potential solution to improve the wettability and cell anchorage is discussed.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Citation

HAO, L....et al., 2007. Characterisation of selective laser sintered hydroxyapatite based biocomposite structures for bone replacement. Proceedings of the Royal Society, Series A – Mathematical, Physical & Engineering Sciences, 463(2084), pp. 1857-1869.

Publisher

© The Royal Society

Version

VoR (Version of Record)

Publication date

2007

Notes

This article was published in the journal, Proceedings of the Royal Society, Series A – Mathematical, Physical & Engineering Sciences [© The Royal Society]. The definitive version is available at: http://dx.doi.org/doi:10.1098/rspa.2007.1854

ISSN

1471-2946

Language

en

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