Nanocrystalline Hydroxyapatite Coatings: Preparation, Characterization and Evaluation of the Bioactivity
| Autor: | G. D. Soares, Antonia Jiménez-Morales, A.A. El-Hadad, José Mauro Granjeiro, E. Peón, Ivan Napoleão Bastos, Violeta Barranco, Juan Carlos Galván Sierra |
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| Rok vydání: | 2013 |
| Předmět: |
Ceramics
Materials science Medicina Simulated body fluid Cytotoxicity Alloy engineering.material Ingeniería Industrial Corrosion Hydroxyapatite Biomaterials Crystallinity Coating Ceramic Composite material Sol-gel Materiales In Vitro tests Química visual_art engineering visual_art.visual_art_medium Layer (electronics) Bioma-terials |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname V Latin American Congress on Biomedical Engineering CLAIB 2011 May 16-21, 2011, Habana, Cuba ISBN: 9783642211973 e-Archivo. Repositorio Institucional de la Universidad Carlos III de Madrid |
| Popis: | Trabajo presentado al "V Latin American Congress on Biomedical Engineering CLAIB" celebrado en La Haban del 16 al 21 de mayo de 2011.-- El pdf es la versión post-print. The coating of metallic alloys with bioactive ceramics aims to accelerate bone formation around implant, contributing to its fixation. In this paper, the deposition of bioactive hydroxyapatite ceramic by sol-gel method on Ti-6Al-4V alloy sheets was studied. Coatings prepared from hydroxyapatite sol have been accomplished by dip-coating technique on non-toxic Ti-6Al-4V alloy for biomedical applications. The coating layer was characterized by X-ray diffraction provided valuable information about the phase transformation, identification of the phases developed and degree of crystallinity. Scanning electron microscopy was applied to study the surface morphology and coating adhesion to substrate was evaluated by shear testing (ASTM F 1044-05). The obtained results show that all the prepared samples are ceramic nanopowders with crystal structure and composition like hydroxyapatite, with small deviations from the one present in the human bone. The corrosion behavior of the resulting hydroxyapatite coatings in a simulated body fluid (SBF) was studied by electrochemical impedance spectroscopy. The hydroxyapatite coated Ti-6Al-4V alloy displayed excellent bioactivity when soaked in the SBF and acceptable corrosion protection behavior. The citocompatibility test according to ISO 10993-5 standard shows that sol-gel coating did not provoke cell dead. © 2013 Springer. Los autores agradecen el soporte financiero a estas investigaciones por medio de proyectos de la CNPq (Ref. 491512/2004-0) y del MCINN (Ref. MAT2006-04486). |
| Databáze: | OpenAIRE |
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