Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 909, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2022.164694
Keywords
Magnesium alloy; Metformin; Corrosion resistance; Osteogenesis; Anti-inflammatory
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Funding
- National Natural Science Foundation of China [81960410, 81860386]
- Scientific Research Project of Guangxi Health and Family Planning Commission [z2015692]
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A hydroxyapatite/chitosan-metformin (HA/CS-MF) composite coating was prepared on AZ31 magnesium alloy by hydrothermal treatment to improve the corrosion resistance and osteogenic activity. The coating exhibited excellent biocompatibility, anti-inflammatory activity, and upregulated bone-related gene expression.
The rapid degradation rate of degradable magnesium alloys limits their application as orthopaedic implants. To improve the osteogenic activity and corrosion resistance of magnesium alloys, a hydroxyapatite/chitosan-metformin (HA/CS-MF) composite coating was prepared on AZ31 magnesium alloy by hydrothermal treatment. The structure and morphology of the composite coating were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), energy dispersive spectroscopy (EDS), and scanning electron microscopy (SEM). Electrochemical tests and hydrogen evolution experiments were carried out to evaluate the corrosion resistance of the HA/CS-MF composite coating. At the same time, the cytocompatibility, osseointegration ability and anti-inflammatory activity of the HA/CS-MF composite coating were studied. The findings revealed that the HA/CS-MF composite coating exhibits excellent corrosion resistance, biocompatibility and osteogenic activity; can upregulate the expression level of bone-related genes; and is conducive to the polarization of M2 macrophages. (c) 2022 Elsevier B.V. All rights reserved.
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