New Bioactive Surfaces For Titanium Implants
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New Bioactive Surfaces for Titanium Implants
Author | : Laƫtitia Salou |
Publisher | : |
Total Pages | : 212 |
Release | : 2015 |
Genre | : |
ISBN | : |
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Biocompatible and corrosion resistant regarding biological fluids, titanium is still an inert material: it does not participate actively at the tissue-integration around the implant. Surface modification of titanium at nanoscale can promote cell adhesion and differentiation by modulate genes expression due to a phenomenon of mechano-transduction. In this thesis, we have focused on the development, the characterization and the direct application of our nanostructured surface of medical devices. First of all, our study focused on the preparation and physicochemical characterization. After obtaining reproducible surfaces on small samples, our research has focused on the biological characterization of the surface. In-vivo studies conducted in rabbits have allowed us to show similar biomechanical attachment and good osseointegration of the nanostructured surface compared to commonly used surfaces on the market. The application of this new surface on more complex titanium implant such as tracheal prosthesis, has allowed us to observe delamination phenomenon of the nanostructure layer. Therefore, our research was oriented towards the problem of mechanical strength of the surface with the realization of nano scratch test and tribology. A topic in the zeitgeist, as a new EU regulation for medical devices which incorporate nanomaterials will take effect in 2017. To conclude, this work enable to propose a nanosurface with promising results of tissues integration required for medical device.
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