Término solicitado: YBARRA, GABRIEL O./(22)
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| Tipo de Docum.: | artículo |
| Título: | Manufacture of nanosized apatite coatings on titanium with different surface treatments using a supersaturated calcification solution |
| Autor: | Paz Ramos, Adrian; Ybarra, Gabriel O.; Pazos, Leonardo M.; Parodi, María B.; Rodríguez, Laura; López Hernández, Mónica; González Ruíz, Jesús E. |
| Título Ser./Col.: | Química Nova, 39 (10) |
| Autor Inst. Ser./Col.: | Sociedade Brasileira de Química. SBQ. São Paulo. BR |
| Idioma: | eng |
| Datos de Edición: | São Paulo. BR. SBQ. 2016. |
| Pág./Vol.: | p. 1159-1164. |
| Descriptores: | Recubrimientos superficiales; Titanio; Procesos superficiales; Calcio; Biomateriales; Cerámica; Materiales cerámicos; Fosfato de calcio; Nanopartículas |
| 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. |
 Ver Documento
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Trabajo de INTI |
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URL: |
http://static.sites.sbq.org.br/quimicanova.sbq.org.br/pdf/AR20160096.pdf |
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