Micro-Arc Oxidation in Titanium and Its Alloys: Development and Potential of Implants

Author:

Ming Xinwei12,Wu Yan3,Zhang Ziyue12,Li Yan12ORCID

Affiliation:

1. School of Materials Science and Engineering, Beihang University, Beijing 100191, China

2. Zhongfa Aviation Institute, Beihang University, Hangzhou 311115, China

3. Institute of Translational Medicine, Shanghai University, Shanghai 200444, China

Abstract

Titanium (Ti) and its alloys are widely recognized as preferred materials for bone implants due to their superior mechanical properties. However, their natural surface bio-inertness can hinder effective tissue integration. To address this challenge, micro-arc oxidation (MAO) has emerged as an innovative electrochemical surface modification technique. Its benefits range from operational simplicity and cost-effectiveness to environmental compatibility and scalability. Furthermore, the distinctive MAO process yields a porous topography that bestows versatile functionalities for biological applications, encompassing osteogenesis, antibacterial, and anti-inflammatory properties. In this review, we undertake an examination of the underlying mechanism governing the MAO process, scrutinize the multifaceted influence of various factors on coating performance, conduct an extensive analysis of the development of diverse biological functionalities conferred by MAO coatings, and discuss the practical application of MAO in implants. Finally, we provide insights into the limitations and potential pathways for further development of this technology in the field of bone implantation.

Funder

National Key Research and Development Program of China

Publisher

MDPI AG

Subject

Materials Chemistry,Surfaces, Coatings and Films,Surfaces and Interfaces

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