Abstract
Plasma oxidation of metallic Mg improves its corrosion resistance by controlling the biodegradation rate. Recently, sodium silicate (Na2SiO3) has been used as the stabilizer in an alkaline electrolyte for anodization. However, Na2SiO3 is formed of Si(OH)4 in the solution, which is converted to SiO2, and that could remain in the body as undegradable particles. Therefore, the aim of this study was to compare glycerol and Na2SiO3 as biocompatible stabilizers by cytotoxicity assessments and in ovo. The applied current value was decreased by adding glycerol, and it was insufficient to cause spark formation. Although the Mg ion volume in elution of the glycerol group was higher than that in the Na2SiO3 group, the growth of the chicken embryo and number of somites were higher with the glycerol than with the Na2SiO3 stabilizer. The oxide film formed due to the addition of Na2SiO3 contributed to improving the corrosion resistance, but it did not show a positive effect on biocompatibility from the perspective of cell viability and in ovo analysis.
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Kim, YK., Lee, SJ. & Park, IS. Assessment of the surface properties and evaluation of toxicity of anodized pure Mg according to various stabilizers in electrolyte. Met. Mater. Int. 22, 737–745 (2016). https://doi.org/10.1007/s12540-016-5675-8
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DOI: https://doi.org/10.1007/s12540-016-5675-8