Adhesive strength of bioactive oxide layers fabricated on TNTZ alloy by three different alkali-solution treatments

E Takematsu; K Cho; J Hieda; M Nakai; K Katsumata; K Okada; M Niinomi; N Matsushita

doi:10.1016/j.jmbbm.2015.12.046

Adhesive strength of bioactive oxide layers fabricated on TNTZ alloy by three different alkali-solution treatments

J Mech Behav Biomed Mater. 2016 Aug:61:174-181. doi: 10.1016/j.jmbbm.2015.12.046. Epub 2016 Jan 7.

Authors

E Takematsu¹, K Cho², J Hieda³, M Nakai⁴, K Katsumata⁵, K Okada⁶, M Niinomi⁴, N Matsushita⁷

Affiliations

¹ Department of Electrochemistry, Tokyo Institute of Technology, 4259 Nagatsuta, Midori, Yokohama 226 8503, Japan.
² Division of Materials and Manufacturing Science, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565 0871, Japan.
³ Department of Mechanical Science and Technology, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro, Tokyo 152 8550, Japan.
⁴ Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 985 8577, Japan.
⁵ Photocatalysis International Research Center, Research Institute for Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278 8510, Japan.
⁶ Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro, Tokyo 152 8550, Japan.
⁷ Department of Chemistry and Materials Science, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro, Tokyo 152 8550, Japan; Department of Electrochemistry, Tokyo Institute of Technology, 4259 Nagatsuta, Midori, Yokohama 226 8503, Japan. Electronic address: matsushita.n.ab@m.titech.ac.jp.

PMID: 26866453
DOI: 10.1016/j.jmbbm.2015.12.046

Abstract

Bioactive oxide layers were fabricated on Ti-29Nb-13Ta-4.6Zr alloy (TNTZ) by three different alkali solution treatments: hydrothermal (H), electrochemical (E), and hydrothermal-electrochemical (HE). The adhesive strength of the oxide layer to the TNTZ substrate was measured to determine whether this process achieves sufficient adhesive strength for implant materials. Samples subjected to the HE process, in which a current of 15mA/cm(2) was applied at 90°C for 1h (HE90-1h), exhibited a comparatively higher adhesive strength of approximately 18MPa while still maintaining a sufficiently high bioactivity. Based on these results, an oxide layer fabricated on TNTZ by HE90-1h is considered appropriate for practical biomaterial application, though thicker oxide layers with many cracks can lead to a reduced adhesive strength.

Keywords: Adhesive strength; Anodization; Bioactive oxide layer; Hydrothermal–electrochemical processing; TNTZ alloy; Tensile strength.

MeSH terms

Adhesives
Alkalies / chemistry*
Dental Alloys*
Materials Testing
Niobium
Oxides / chemistry*
Surface Properties
Tantalum
Tensile Strength
Titanium
Zirconium

Substances

Adhesives
Alkalies
Dental Alloys
Oxides
Ti-29Nb-13Ta-4.6Zr alloy
Niobium
Tantalum
Zirconium
Titanium