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

Autor(es)

Campanelli, Leonardo C. ^[1] ; Oliveira, Nilson T. C. ^[2] ; da Silva, Paulo Sergio C. P. ^[1] ; Bolfarini, Claudemiro ^[1] ; Palmieri, Annalisa ^[3] ; Cura, Francesca ^[3] ; Carinci, Francesco ^[4] ; Motheo, Artur J. ^[2]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Dept Mat Engn, Sao Carlos, SP - Brazil

^[2] Univ Sao Paulo, Sao Carlos Inst Chem, Sao Carlos, SP - Brazil

^[3] Univ Bologna, Dept Expt Diagnost & Specialty Med, Bologna - Italy

^[4] Univ Ferrara, Dept Morphol Surg & Expt Med, Ferrara - Italy

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART B-APPLIED BIOMATERIALS; v. 107, n. 1, p. 86-96, JAN 2019.
• Citações Web of Science: 2

Resumo

The objective of this work was a systemic evaluation of the anodizing treatment in a beta-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. (c) 2018 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 107B: 86-96, 2019. (AU)

• Processo FAPESP: 12/11350-0 - Desenvolvimento de superfícies nanoestruturadas via eletroquímica em ligas biomédicas de titânio
• Beneficiário: Nilson Tadeu Camarinho de Oliveira
• Modalidade de apoio: Bolsas no Brasil - Jovens Pesquisadores
• Processo FAPESP: 12/01652-9 - Desenvolvimento de superfícies nanoestruturadas via eletroquímica em ligas biomédicas de titânio
• Beneficiário: Nilson Tadeu Camarinho de Oliveira
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores
• Processo FAPESP: 16/12995-5 - Fadiga de uma liga beta metaestável de titânio para aplicação como biomaterial
• Beneficiário: Leonardo Contri Campanelli
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado