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Title: Characterisation of selective laser sintered hydroxyapatite based biocomposite structures for bone replacement
Authors: Hao, L.
Savalani, M.M.
Zhang, Y.
Tanner, K.E.
Heath, R.J.
Harris, Russell A.
Keywords: Selective laser sintering
Hydroxyapatite
Surface roughness
Wettability
Porosity
Biocomposite structure
Issue Date: 2007
Publisher: © The Royal Society
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.
Abstract: 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.
Description: 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
Version: Published
DOI: doi:10.1098/rspa.2007.1854
URI: https://dspace.lboro.ac.uk/2134/4637
ISSN: 1471-2946
Appears in Collections:Published Articles (Mechanical and Manufacturing Engineering)

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