Surface properties of nano-structured TiO2 for dental implants design

Objectives:The objective of this study is to characterize the interactions and the adsorption of some small organic molecules on nano-structured Ti surfaces and to characterize them by using different spectroscopies, such as X-photoelectron spectroscopy (XPS), infrared (IR) spectroscopy and scanning electron microscope (SEM), which may define the ideal surface properties for better biological results of dental implants. Methods: Titanium nanotubes arrays were fabricated by anodic oxidation of titanium samples in a fluoride-based solution at a constant potential. We have studied the adsorption of sodium phosphate Na3PO4, ,aspartic acid HOOCCH(NH2)CH2COOH and Amoxicilline C16 H19N3O5S. The molecular deposition was carried out by two methods; the first one was electro-deposition and the other was simply immersing the samples in the solution and then rinsing. Results: Scanning electron microscope (SEM) showed the morphology of the fabricated nanotubes arrays. Results obtained from infrared spectroscopy showed that the molecular adsorption by nano-structured titanium is realizable in both methods and infrared spectroscopy allows us to highlight differences in the mechanism of adsorption between early and late filing of deposit . Similarly, different levels of adsorption can be observed according to the potential of working electrode and the molecules themselves. X-photoelectron spectroscopy (XPS) confirmed the previous results. Conclusion: Molecular adsorption by titanium nanotubes arrays is realizable and it depends on many factors such as the conditions of deposition, the size of nanotubes and the studied molecules.