NDLI: Novel Mg-Incorporated Micro-Arc Oxidation Coatings for Orthopedic Implants Application

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Novel Mg-Incorporated Micro-Arc Oxidation Coatings for Orthopedic Implants Application

Content Provider	MDPI
Author	Zhang, Rongfa Zhong, Sheng Zeng, Lilan Li, Hongyu Zhao, Rongfang Zhang, Shufang Duan, Xinting Huang, Jingsong Zhao, Ying
Copyright Year	2021
Description	In this study, Ti-6Al-4V alloy samples were processed by micro-arc oxidation (MAO) in phytic acid $(H_{12}$Phy) electrolytes with the addition of different concentrations of $EDTA-MgNa_{2}$ $(Na_{2}$MgY) and potassium hydroxide (KOH). The surface characterization and cytocompatibility of MAO-treated samples were evaluated systematically. $H_{12}$Phy is a necessary agent for MAO coating formation, and the addition of $Na_{2}$MgY and KOH into the electrolytes increases the surface roughness, micropore size and Mg contents in the coatings. The MAO coatings are primarily composed of anatase, rutile, MgO and $Mg_{3}(PO_{4})_{2}$. Magnesium (Mg) ions in the electrolytes enter into MAO coatings by diffusion and electromigration. The MAO coatings containing 2.97 at% Mg show excellent cell viability, adhesion, proliferation, alkaline phosphatase activity, extracellular matrix (ECM) mineralization and collagen secretion, but the cytocompatibility of the MAO coatings containing 6.82 at% Mg was the worst due to the excessively high Mg content. Our results revealed that MAO coatings with proper Mg contents improve the cytocompatibility of the Ti-6Al-4V alloys and have large potential in orthopedic applications.
Starting Page	5710
e-ISSN	19961944
DOI	10.3390/ma14195710
Journal	Materials
Issue Number	19
Volume Number	14
Language	English
Publisher	MDPI
Publisher Date	2021-09-30
Access Restriction	Open
Subject Keyword	Materials Titanium Alloys Micro-arc Oxidation Cytocompatibility Magnesium H12phy
Content Type	Text
Resource Type	Article

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