Processing of hydroxyapatite obtained by combustion synthesis

One of the reasons of implants failure are the stress forces appearing in the material–tissue interface due to the differences between their mechanical properties. For this reason, similar mechanical properties to the surrounding tissue are desirable. The synthesis of hydroxyapatite by solution combustion method and its processing have been studied in order to obtain fully dense ceramic bodies with improved mechanical strength. Combustion synthesis provides nanostructured powders characterized by a high surface area to facilitate the following sintering. Moreover, synthesis was conducted in aqueous and oxidizing media. Oxidizing media improve homogenization and increase the energy released during combustion. It gives rise to particles whose morphology and size suggest lower surface energies compared with aqueous media. The obtained powders were sintered by using a controlled sintering rate schedule. Lower surfaces energies minimize the shrinkage during sintering and relative densities measurements and diametral compression test confirm improved densification and consequently mechanical properties. © 2017 SECV. Published by Elsevier España, S.L.U. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). Procesamiento de hidroxiapatita obtenida mediante síntesis por combustión Palabras clave: Hidroxiapatita Síntesis por combustión Sinterización a velocidad controlada Módulo de Weibull r e s u m e n Una de las razones principales de fracaso de los implantes son las fuerzas de estrés que aparecen en la interface material-tejido debido a las diferencias existentes entre sus propiedades mecánicas. Por esta razón, es necesario que el implante posea propiedades mecánicas similares a las del tejido circundante. La síntesis de hidroxiapatita por el método de combustión y su procesamiento se han estudiado con el objetivo de obtener cuerpos cerámicos completamente densificados y, consecuentemente, con propiedades mecánicas ∗ Corresponding author. E-mail address: [email protected] (M. Canillas). http://dx.doi.org/10.1016/j.bsecv.2017.05.002 0366-3175/© 2017 SECV. Published by Elsevier España, S.L.U. This is an open access article under the CC BY-NC-ND license (http:// creativecommons.org/licenses/by-nc-nd/4.0/). Document downloaded from http://www.elsevier.es, day 03/08/2017. This copy is for personal use. Any transmission of this document by any media or format is strictly prohibited.