J. Mater. Sci. Technol. ›› 2022, Vol. 97: 69-78.DOI: 10.1016/j.jmst.2021.04.029

• Research Article • Previous Articles     Next Articles

Corrosion behavior, antibacterial ability, and osteogenic activity of Zn-incorporated Ni-Ti-O nanopore layers on NiTi alloy

Yonghua Sun, Yuyu Zhao, He Zhang, Youjie Rong, Runhua Yao, Yi Zhang, Xiaohong Yao*(), Ruiqiang Hang*()   

  1. Laboratory of Biomaterial Surfaces & Interfaces, Institute of New Carbon Materials, College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
  • Received:2020-12-14 Revised:2021-04-02 Accepted:2021-04-13 Published:2021-06-16 Online:2021-06-16
  • Contact: Xiaohong Yao,Ruiqiang Hang
  • About author:hangruiqiang@tyut.edu.cn (R. Hang).
    * E-mail addresses: xhyao@tyut.edu.cn (X. Yao),

Abstract:

Development of bone fixation devices with excellent corrosion resistance, antibacterial ability, and osteogenic activity is critical for promoting fracture healing. In this study, Zn-incorporated nanopore (NP) layers were prepared on the NiTi alloy through anodization and hydrothermal treatment. Results show that Zn can be evenly incorporated into the NP layers in the form of ZnTiO3. The Zn-incorporated samples exhibit good corrosion resistance and significantly reduce Ni2+ release. Meanwhile, the samples can continuously release Zn2+, which is responsible for excellent long-term antibacterial ability. Furthermore, the synergetic effect of Zn2+ release and nanoporous structure of the NP layers endues the NiTi alloy excellent osteogenic activity, as verified by upregulated alkaline phosphatase activity, secretion of type I collagen, and extracellular matrix mineralization. Therefore, Zn-incorporated Ni-Ti-O NP layers have great potential as biomedical coatings of NiTi-based implant materials.

Key words: Nickel-titanium alloy, Anodization, Corrosion behavior, Antibacterial ability, Osteogenic activity