Functionalization of an experimental Ti-Nb-Zr-Ta alloy with a biomimetic coating produced by plasma electrolytic oxidation

Author(s)

Cordeiro, Jairo M. ^{[1, 2]} ; Nagay, Bruna E. ^[1] ; Ribeiro, Ana Lucia R. ^{[3, 4]} ; da Cruz, Nilson C. ^[5] ; Rangel, Elidiane C. ^[5] ; Fais, Laiza M. G. ^[6] ; Vaz, Luis G. ^[6] ; Barao, Valentim A. R. ^{[1, 2]}

Affiliation

^[1] Univ Estadual Campinas, Piracicaba Dent Sch, Dept Prosthodont & Periodontol, Ave Limeira 901, BR-13414903 Piracicaba, SP - Brazil

^[2] Inst Biomat Tribocorros & Nanomed IBTN, Rio De Janeiro - Brazil

^[3] Fac Ciencias Tocantins FACIT, Ave Jose de Brito 730, Araguaina, Tocantins - Brazil

^[4] Ctr Univ Tocantinense Presidente Antonio Carlos U, Ave Filadelfia 568, Araguaina, Tocantins - Brazil

^[5] Sao Paulo State Univ UNESP, Engn Coll, Lab Technol Plasmas, Ave Tres De Marco 511, BR-18087180 Sorocaba, SP - Brazil

^[6] Univ Estadual Paulista UNESP, Araraquara Dent Sch, Dept Dent Mat & Prosthodont, R Humaita 1680, Araraquara, SP - Brazil

• Document type: Journal article
• Source: Journal of Alloys and Compounds; v. 770, p. 1038-1048, JAN 5 2019.
• Web of Science Citations: 7

Abstract

This study developed an experimental quaternary titanium (Ti) alloy and evaluated its surface properties and electrochemical stability. The viability for a biofunctional surface treatment was also tested. Ti-35Nb-7Zr-5Ta (wt%) alloy was developed from pure metals. Commercially pure titanium (cpTi) and Ti-6Al-4V were used as controls. All groups had two surface conditions: untreated (machined surface) and modified by plasma electrolytic oxidation (PEO) (treated surface). The experimental alloy was successfully synthesized and exhibited beta microstructure. PEO treatment created a porous surface with increased roughness, surface free energy, hardness and electrochemical stability (p <0.05). For the machined surfaces, the Ti-Nb-Zr-Ta alloy presented the lowest hardness and elastic modulus (p <0.05) and displayed greater polarization resistance relative to cpTi. Only PEO-treated cpTi and Ti-Al-V alloys exhibited anatase and rutile as crystalline structures. The beta experimental Ti-Nb-Zr-Ta alloy seems to be a good alternative for the manufacture of dental implants, since it presents elastic modulus closer to that of bone, feasibility for surface treatment, electrochemical stability and absence of toxic elements. (C) 2018 Elsevier B.V. All rights reserved. (AU)

• FAPESP's process: 17/01320-0 - Development of a bioactive and antibacterial surface containing Cu2O for dental implants
• Grantee: Jairo Matozinho Cordeiro
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 16/11470-6 - Magnetron sputtering deposition of tantalum oxide (Ta2O5) films onto titanium surface for biomedical applications: electrochemical behavior, biocompatibility and microbiologic analysis
• Grantee: Valentim Adelino Ricardo Barão
• Support Opportunities: Regular Research Grants