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Surface topography of hydroxyapatite affects ROS17/2.8 cells response

Rosa, A.L., Beloti, M.M., van Noort, R., Hatton, P.V. and Devlin, A.J. (2002) Surface topography of hydroxyapatite affects ROS17/2.8 cells response. Pesqui Odontol Bras, 16 (3). pp. 209-215. ISSN 1517-7491

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Abstract

Hydroxyapatite (HA) has been used in orthopedic, dental, and maxillofacial surgery as a bone substitute. The aim of this investigation was to study the effect of surface topography produced by the presence of microporosity on cell response, evaluating: cell attachment, cell morphology, cell proliferation, total protein content, and alkaline phosphatase (ALP) activity. HA discs with different percentages of microporosity (< 5%, 15%, and 30%) were confected by means of the combination of uniaxial powder pressing and different sintering conditions. ROS17/2.8 cells were cultured on HA discs. For the evaluation of attachment, cells were cultured for two hours. Cell morphology was evaluated after seven days. After seven and fourteen days, cell proliferation, total protein content, and ALP activity were measured. Data were compared by means of ANOVA and Duncan’s multiple range test, when appropriate. Cell attachment (p = 0.11) and total protein content (p = 0.31) were not affected by surface topography. Proliferation after 7 and 14 days (p = 0.0007 and p = 0.003, respectively), and ALP activity (p = 0.0007) were both significantly decreased by the most irregular surface (HA30). These results suggest that initial cell events were not affected by surface topography, while surfaces with more regular topography, as those present in HA with 15% or less of microporosity, favored intermediary and final events such as cell proliferation and ALP activity.

Item Type: Article
Copyright, Publisher and Additional Information: © 2002 Sociedade Brasileira de Pesquisa Odontológica
Keywords: Hydroxyapatite, Porosity, Surface topography, ROS17/2.8 cells
Institution: The University of Sheffield
Academic Units: The University of Sheffield > Faculty of Medicine, Dentistry and Health (Sheffield) > School of Dentistry (Sheffield) > Department of Adult Dental Care (Sheffield)
The University of Sheffield > University of Sheffield Research Centres and Institutes > Centre for Biomaterials and Tissue Engineering (Sheffield)
Depositing User: Sherpa Assistant
Date Deposited: 08 Apr 2005
Last Modified: 05 Jun 2014 12:12
Status: Published
Refereed: Yes
URI: http://eprints.whiterose.ac.uk/id/eprint/384

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