Abstract
In this study, the effects of the parameters such as applied potential difference, time and annealing temperature in the titania nanotubes formation were evaluated. The morphology of the nanotubes was evaluted by using Field Emission Gun - Scanning Electron Microscope (FEG-SEM), Atomic Force Microscope (AFM), contact angle and X-rays diffraction (XRD). Self-organized nano-structures were formed on the Ti-7.5Mo alloy surface from the same electrolyte (glycerol/NH4F) for all conditions. It was observed that the potential influenced the diameter while the length was changed according to the anodization time lenght. The presence of the phases anatase and rutile was altered by annealing temperature. Results showed that 20V-48h-450 oC was the better than other conditions for application as biomaterial.Keywords:
Highlights
Titanium (Ti) and its alloys are widely used to manufacture dental implants, maxillofacial, and orthopedic prostheses due to their excellent mechanical properties, low specific weight, high resistance to corrosion, and high biocompatibility[1,2]
These results were similar to Lockman et al (2010)[28] who concluded that the tube diameter is linearly dependent on the potential applied during the growth of nanotubes
In the samples annealed at 600 oC (Figure 4), there is the presence of peaks of titanium, anatase and rutile phases
Summary
Titanium (Ti) and its alloys are widely used to manufacture dental implants, maxillofacial, and orthopedic prostheses due to their excellent mechanical properties, low specific weight, high resistance to corrosion, and high biocompatibility[1,2]. A significant difference in elastic modulus between implants and bone tissue can lead to stress, and thereby may cause poor osseointegration, while an implant with a low elastic modulus can facilitate bone growth[10].Over the past decade, various techniques such as sol-gel method[11], hydrothermal method[12], photo oxidation reaction[13], electro spinning method[14] and anodization[15,16] of titanium surface modification have been employed to fabricate implant surfaces These techniques are used to promote osseointegration, faster healing time, higher bone-to-implant contact ratio and longevity of titanium implants[17]. The structure of the oxide film formed on titanium can be anatase, a mixture of anatase
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