Biological Behaviour and Enhanced Anticorrosive Performance of the Nitrided Superelastic Ti-23Nb-0.7Ta-2Zr-0.5N Alloy

The influence of gas nitriding surface treatment on the superelastic Ti-23Nb-0.7Ta-2Zr-0.5N alloy was evaluated. A thorough characterization of bare and nitrided Ti-based alloy and pure Ti was performed in terms of surface film composition and morphology, electrochemical behaviour, and short term os...

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Published in:BioMed research international 2015-01, Vol.2015 (2015), p.1-14
Main Authors: Cimpean, Anisoara, Gloriant, Thierry, Tabirca, Mariana-Cristina, Calderon Moreno, Jose M., Osiceanu, Petre, Drob, Silviu Iulian, Vasilescu, Cora, Mitran, Valentina, Gordin, Doina-Margareta
Format: Article
Language:English
Subjects:
Adhesive wear
Alloys - chemistry
Alloys - therapeutic use
Biocompatibility
Biocompatible Materials
Biomedical materials
Biomedical research
Bone-Implant Interface
Cell growth
Cell Proliferation - drug effects
Chemical Sciences
Corrosion resistance
High temperature
Humans
Materials
Materials Testing
Mechanical properties
Nitrides
Orthopedic implants
Osteoblasts - drug effects
Physiology
Properties
Prostheses
Prostheses and Implants
Studies
Surface Properties
Titanium - chemistry
Titanium - therapeutic use
Titanium alloys
Transplants & implants
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Summary:The influence of gas nitriding surface treatment on the superelastic Ti-23Nb-0.7Ta-2Zr-0.5N alloy was evaluated. A thorough characterization of bare and nitrided Ti-based alloy and pure Ti was performed in terms of surface film composition and morphology, electrochemical behaviour, and short term osteoblast response. XPS analysis showed that the nitriding treatment strongly influenced the composition (nitrides and oxynitrides) and surface properties both of the substrate and of the bulk alloy. SEM images revealed that the nitrided surface appears as a similar dotted pattern caused by the formation of N-rich domains coexisting with less nitrided domains, while before treatment only topographical features could be observed. All the electrochemical results confirmed the high chemical stability of the nitride and oxynitride coating and the superiority of the applied treatment. The values of the corrosion parameters ascertained the excellent corrosion resistance of the coated alloy in the real functional conditions from the human body. Cell culture experiments with MG63 osteoblasts demonstrated that the studied biomaterials do not elicit any toxic effects and support cell adhesion and enhanced cell proliferation. Altogether, these data indicate that the nitrided Ti-23Nb-0.7Ta-2Zr-0.5N alloy is the most suitable substrate for application in bone implantology.
ISSN:2314-6133
2314-6141
DOI:10.1155/2015/261802