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Title | Bioactivity Performance of Pure Mg after Plasma Electrolytic Oxidation in Silicate-Based Solutions |
Authors |
Husak, Yevheniia Volodymyrivna
Michalska, J. Oleshko, Oleksandr Mykolaiovych Korniienko, Viktoriia Volodymyrivna Korniienko, Viktoriia Volodymyrivna Grundsteins, K. Dryhval, Bohdan Oleksandrovych Altundal, S. Mishchenko, O. Viter, Roman Vitaliiovych Simka, W. |
ORCID |
http://orcid.org/0000-0002-2217-3717 http://orcid.org/0000-0003-2439-3243 http://orcid.org/0000-0002-5144-2138 |
Keywords |
magnesium plasma electrolytic oxidation silicate bath degradation rate biocompatibility antibacterial properties |
Type | Article |
Date of Issue | 2021 |
URI | https://essuir.sumdu.edu.ua/handle/123456789/83897 |
Publisher | MDPI |
License | Creative Commons Attribution 4.0 International License |
Citation | Husak Y, Michalska J, Oleshko O, Korniienko V, Grundsteins K, Dryhval B, Altundal S, Mishchenko O, Viter R, Pogorielov M, Simka W. Bioactivity Performance of Pure Mg after Plasma Electrolytic Oxidation in Silicate-Based Solutions. Molecules. 2021; 26(7):2094. https://doi.org/10.3390/molecules26072094 |
Abstract |
The biodegradable metals, including magnesium (Mg), are a convenient alternative to
permanent metals but fast uncontrolled corrosion limited wide clinical application. Formation of a
barrier coating on Mg alloys could be a successful strategy for the production of a stable external layer
that prevents fast corrosion. Our research was aimed to develop an Mg stable oxide coating using
plasma electrolytic oxidation (PEO) in silicate-based solutions. 99.9% pure Mg alloy was anodized
in electrolytes contained mixtures of sodium silicate and sodium fluoride, calcium hydroxide and
sodium hydroxide. Scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy
(EDX), contact angle (CA), Photoluminescence analysis and immersion tests were performed to
assess structural and long-term corrosion properties of the new coating. Biocompatibility and
antibacterial potential of the new coating were evaluated using U2OS cell culture and the grampositive Staphylococcus aureus (S. aureus, strain B 918). PEO provided the formation of a porous
oxide layer with relatively high roughness. It was shown that Ca(OH)2 was a crucial compound for
oxidation and surface modification of Mg implants, treated with the PEO method. The addition of
Ca2+ ions resulted in more intense oxidation of the Mg surface and growth of the oxide layer with a
higher active surface area. Cell culture experiments demonstrated appropriate cell adhesion to all
investigated coatings with a significantly better proliferation rate for the samples treated in Ca(OH)2
- containing electrolyte. In contrast, NaOH-based electrolyte provided more relevant antibacterial
effects but did not support cell proliferation. In conclusion, it should be noted that PEO of Mg alloy
in silicate baths containing Ca(OH)2 provided the formation of stable biocompatible oxide coatings
that could be used in the development of commercial degradable implants |
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Husak_et.al_Bioactivity_Performance_2021.pdf | 51.2 MB | Adobe PDF | 674965781 |
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