Fatigue resistance, electrochemical corrosion and biological response of Ti‐15Mo with surface modified by amorphous TiO2 nanotubes layer

The objective of this work was a systemic evaluation of the anodizing treatment in a β‐type Ti‐15Mo alloy to grow a TiO2 nanostructured layer for osseointegration improvement. The technical viability of the surface modification was assessed based on the resistance to mechanical fatigue, electrochemi...

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Bibliographic Details
Published in:Journal of biomedical materials research. Part B, Applied biomaterials Applied biomaterials, 2019-01, Vol.107 (1), p.86-96
Main Authors: Campanelli, Leonardo C, Oliveira, Nilson T C, Paulo Sergio C P da Silva, Bolfarini, Claudemiro, Palmieri, Annalisa, Cura, Francesca, Carinci, Francesco, Motheo, Artur J
Format: Article
Language:English
Subjects:
Anodizing
Bacterial corrosion
Biocompatibility
Biomedical materials
Cell differentiation
Corrosion
Corrosion fatigue
Corrosion resistance
Differentiation (biology)
Electrochemical corrosion
Electrochemistry
Ethylene glycol
Evaluation
Fatigue
Fatigue strength
Materials research
Materials science
Nanotechnology
Nanotubes
Osseointegration
Osteoblastogenesis
Osteoblasts
Silica
Surgical implants
Titanium base alloys
Titanium dioxide
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Summary:The objective of this work was a systemic evaluation of the anodizing treatment in a β‐type Ti‐15Mo alloy to grow a TiO2 nanostructured layer for osseointegration improvement. The technical viability of the surface modification was assessed based on the resistance to mechanical fatigue, electrochemical corrosion, and biological response. By using an organic solution of NH4F in ethylene glycol, a well‐organized array of 90 nm diameter nanotubes was obtained with a potential of 40 V for 6 h, while undefined nanotubes of 25 nm diameter were formed with a potential of 20 V for 1 h. Nevertheless, the production of the 90 nm diameter nanotubes was followed by micrometer pits that significantly reduced the fatigue performance. The undefined nanotubes of 25 nm diameter, besides the greater cell viability and improved osteoblastic cell differentiation in comparison to the as‐polished surface, were not deleterious to the fatigue and corrosion properties. This result strengthens the necessity of an overall evaluation of the anodizing treatment, particularly the fatigue resistance, before suggesting it for the design of implants. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 107B: 86–96, 2019.
ISSN:1552-4973
1552-4981
DOI:10.1002/jbm.b.34097