The chemical composition and surface topography of titanium implants are essential to improve implant osseointegration. The present work studies a non-invasive alternative of electrical impedance spectroscopy for the characterization of the macroporosity inherent to the manufacturing process and the effect of the surface treatment with femtosecond laser of titanium discs. Osteoblasts cell culture growths on the titanium surfaces of the laser-treated discs were also studied with this method. The measurements obtained showed that the femtosecond laser treatment of the samples and cell culture produced a significant increase (around 50%) in the absolute value of the electrical impedance module, which could be characterized in a wide range of frequencies (being more relevant at 500 MHz). Results have revealed the potential of this measurement technique, in terms of advantages, in comparison to tiresome and expensive techniques, allowing semi-quantitatively relating impedance measurements to porosity content, as well as detecting the effect of surface modification, generated by laser treatment and cell culture.
Este estudio muestra los resultados de un trabajo de observación indirecta de la labor de los docentes de las aulas hospitalarias del área de oncología pediátrica del Hospital Universitario Virgen del Rocío, Sevilla. La asistencia a distintas sesiones del aula, así como la entrevista a la docente responsable de la misma, nos ha permitido realizar un análisis detallado de este entorno escolar único. Asimismo, el trabajo se completa con una revisión bibliográfica que facilitó el conocimiento exhaustivo del contexto normativo para este tipo de aulas escolares y de los aspectos pedagógicos y psicológicos a considerar en el proceso enseñanza-aprendizaje.
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