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Ceramic/metal biocidal nanocomposites for bone-related applications

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Abstract

Hydroxyapatite/silver nanocomposites have been designed and synthesized as an engineering material for biomedical applications. The hydroxyapatite matrix was synthesized by a sol–gel method and, subsequently, the Ag nanoparticles were deposited by heterogeneous precipitation followed by two different reduction routes: thermal or chemical. Both sets were studied and compared and, in all cases, the metal nanoparticles appear perfectly isolated and attached to the surface of the hydroxyapatite. The average metal particle size is below 10 nm, allowing an important contact surface between silver and the microorganisms. The antimicrobial behavior against common bacteria showed a high effectiveness, well above the commercial level, as well as against yeast, in the case of the chemically reduced sample. Due to the nanocomposite microstructure, only a negligible portion of metal was released to the lixiviated liquid after the biocide tests, minimizing the risk of toxicity. These nanocomposites offer a solution to the infections on the surface of implants, one of the main problems in reaching a suitable level of osseointegration.

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Acknowledgments

This work was supported by the Spanish Ministry of Science and Innovation (MICINN) under the project MAT2009-14542-C02 and by the Spanish National Research Council (CSIC) under the PIE Project 200860I118. Miriam Miranda has been supported by the Government of the Principality of Asturias under the Severo Ochoa Program.

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Authors and Affiliations

  1. Centro de Investigación en Nanomateriales y Nanotecnología (CINN-CSIC-UO-PA), Parque Tecnológico de Asturias, 33428, Llanera, Spain

    Miriam Miranda, Sonia Lopez-Esteban & Ramón Torrecillas

  2. ITMA Materials Technology, Llanera, Spain

    Adolfo Fernández

  3. Centro Nacional de Biotecnología (CNB-CSIC), 28049, Cantoblanco, Spain

    Francisco Malpartida

  4. Instituto de Ciencia de Materiales de Madrid (ICMM), Consejo Superior de Investigaciones Científicas (CSIC), Cantoblanco, Spain

    José S. Moya

Authors
  1. Miriam Miranda
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  2. Adolfo Fernández
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  3. Sonia Lopez-Esteban
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  4. Francisco Malpartida
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  5. José S. Moya
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  6. Ramón Torrecillas
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Correspondence to Miriam Miranda.

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Miranda, M., Fernández, A., Lopez-Esteban, S. et al. Ceramic/metal biocidal nanocomposites for bone-related applications. J Mater Sci: Mater Med 23, 1655–1662 (2012). https://doi.org/10.1007/s10856-012-4642-2

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  • DOI: https://doi.org/10.1007/s10856-012-4642-2

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