Colección INTI-SNRD


Título: Manufacture of nanosized apatite coatings on titanium with different surface treatments using a supersaturated calcification solution
Fuente: Química Nova, 39 (10)
Autor/es: Paz Ramos, Adrian; Ybarra, Gabriel O.; Pazos, Leonardo M.; Parodi, María B.; Rodríguez, Laura; López Hernández, Mónica; González Ruíz, Jesús E.
Materias: Recubrimientos superficiales; Titanio; Procesos superficiales; Calcio; Biomateriales; Cerámica; Materiales cerámicos; Fosfato de calcio; Nanopartículas
Editor/Edición: SBQ; 2016
Licencia: https://creativecommons.org/licenses/by/3.0/br/
Afiliaciones: Paz Ramos, Adrian. Université de Montréal; Canadá
Ybarra, Gabriel O. Instituto Nacional de Tecnología Industrial (INTI); Argentina
Pazos, Leonardo M. Instituto Nacional de Tecnología Industrial (INTI); Argentina
Parodi, María B. Instituto Nacional de Tecnología Industrial (INTI); Argentina
Rodríguez, Laura. Instituto Nacional de Tecnología Industrial (INTI); Argentina
López Hernández, Mónica. Centro Nacional de Investigaciones Cientificas (CNIC); Cuba
González Ruíz, Jesús E. Universidad de La Habana. Centro de Biomateriales (BioMat-UH); Cuba

Resumen: The biomimetic method is used for the deposition of calcium phosphate coatings (Ca – P) on the surface of different biomaterials. However, the application of this method requires long exposure times in order to obtain a suitable layer thickness for its use in medical devices. In this paper, we present a fast approach to obtain apatite coatings on titanium, using a combination of supersaturated calcification solution (SCS) with chemical modification of the titanium surface. Also, it was evaluated the effect of four different surface treatments on the apatite deposition rate. Commercially pure titanium plates were activated by chemical or thermochemical treatments. Then, the activated samples were immersed in a solution with high content of calcium and phosphate ions at 37 °C for 24 h, mimicking the physiological conditions. The coatings were studied by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX). The use of SCS solutions allowed the formation of crystalline hydroxyapatite coatings within a period of 24 h with a thickness between 1 and 5.3 μm. Besides, precipitates of hydroxyapatite nanoparticles with a globular configuration, forming aggregates with submicrometer size, were found in SCS solutions.
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