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Development of a system to adsorb drugs onto calcium phosphate materials

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Abstract

Several studies were carried out in order to reduce the systemic use of antibiotics due to the high concentration required to provide the minimum inhibitory concentration (MIC) at infected sites. The aim of this study was to develop a system of drug adsorption onto commercial hydroxyapatite (HA, Ca10(PO4)6(OH)2) and glass reinforced hydroxyapatite (GR-HA) granules. The drug will then be released for the local treatment of periodontitis. The antibiotics used in this study were metronidazole, a specific antibiotic indicated for the systemic treatment of periodontitis, and ampicillin, a wide spectrum antibiotic. UV spectroscopy was used to measure the amount of drug adsorbed onto HA and GR-HA granules. Results showed that metronidazole was unable to adsorb on the material’s surface, as opposed to ampicillin which adsorbed both onto HA and GR-HA. Preliminary release kinetics studies were carried out using a flow through dissolution system. Results are discussed in terms of the influence of the different surface characteristics of the materials on the adsorption processes.

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Authors and Affiliations

  1. INEB—Instituto de Engenharia Biomédica, Laboratório de Biomateriais, Rua do Campo Alegre 823, 4150-180, Porto, Portugal

    A. C. Queiroz, J. D. Santos & F. J. Monteiro

  2. Faculdade de Engenharia da Universidade do Porto, Departamento de Engenharia Metalúrgica e de Materiais, Rua Roberto Frias, 4200-466, Porto, Portugal

    A. C. Queiroz, J. D. Santos & F. J. Monteiro

  3. Escola Superior de Tecnologia e Gestão, Ap 574, 4901, Viana do Castelo Codex, Portugal

    A. C. Queiroz

Authors
  1. A. C. Queiroz
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  2. J. D. Santos
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  3. F. J. Monteiro
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Correspondence to A. C. Queiroz.

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Queiroz, A.C., Santos, J.D. & Monteiro, F.J. Development of a system to adsorb drugs onto calcium phosphate materials. J Mater Sci: Mater Med 16, 641–646 (2005). https://doi.org/10.1007/s10856-005-2535-3

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  • DOI: https://doi.org/10.1007/s10856-005-2535-3

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