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Silicon–hydroxyapatite bioactive coatings (Si–HA) from diatomaceous earth and silica. Study of adhesion and proliferation of osteoblast-like cells

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Abstract

The aim of this study consisted on investigating the influence of silicon substituted hydroxyapatite (Si–HA) coatings over the human osteoblast-like cell line (SaOS-2) behaviour. Diatomaceous earth and silica, together with commercial hydroxyapatite were respectively the silicon and HA sources used to produce the Si–HA coatings. HA coatings with 0 wt% of silicon were used as control of the experiment. Pulsed laser deposition (PLD) was the selected technique to deposit the coatings. The Si–HA thin films were characterized by Fourier Transformed Infrared Spectroscopy (FTIR) demonstrating the efficient transfer of Si to the HA structure. The in vitro cell culture was established to assess the cell attachment, proliferation and osteoblastic activity respectively by, Scanning Electron Microscopy (SEM), DNA and alkaline phosphatase (ALP) quantification. The SEM analysis demonstrated a similar adhesion behaviour of the cells on the tested materials and the maintenance of the typical osteoblastic morphology along the time of culture. The Si–HA coatings did not evidence any type of cytotoxic behaviour when compared with HA coatings. Moreover, both the proliferation rate and osteoblastic activity results showed a slightly better performance on the Si–HA coatings from diatoms than on the Si–HA from silica.

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Acknowledgments

This work was supported by the UE-Interreg IIIA (SP1.P151/03) Proteus project and Xunta de Galicia (Projects: 2006/12 and PGIDITO5PXIC30301PN).

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Authors and Affiliations

  1. Department of Applied Physics, E.T.S.I. Industriales, University of Vigo, Campus Lagoas-Marcosende, 36310, Vigo, Spain

    M. López-Álvarez, E. L. Solla, P. González, J. Serra & B. León

  2. 3B’s Research Group—Biomaterials, Biodegradables and Biomimetics, Department of Polymer Engineering, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal

    A. P. Marques & R. L. Reis

  3. IBB—Institute for Biotechnology and Bioengineering, Braga, Portugal

    A. P. Marques & R. L. Reis

Authors
  1. M. López-Álvarez
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  2. E. L. Solla
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  3. P. González
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  4. J. Serra
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  5. B. León
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  6. A. P. Marques
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  7. R. L. Reis
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Correspondence to M. López-Álvarez.

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López-Álvarez, M., Solla, E.L., González, P. et al. Silicon–hydroxyapatite bioactive coatings (Si–HA) from diatomaceous earth and silica. Study of adhesion and proliferation of osteoblast-like cells. J Mater Sci: Mater Med 20, 1131–1136 (2009). https://doi.org/10.1007/s10856-008-3658-0

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  • DOI: https://doi.org/10.1007/s10856-008-3658-0

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