Abstract
Although magnesium as degradable biomaterial already showed clinical proof of concepts, the design of new alloys requires predictive in vitro methods, which are still lacking. Incubation under cell culture conditions to obtain “physiological” corrosion may be a solution. The aim of this study was to analyse the influence of different solutions, addition of proteins and of oxygen availability on the corrosion of different magnesium materials (pure Mg, WE43, and E11) with different surface finishing. Oxygen content in solution, pH, osmolality and ion release were determined. Corrosion led to a reduction of oxygen in solution. The influence of oxygen on pH was enhanced by proteins, while osmolality was not influenced. Magnesium ion release was solution-dependent and enhanced in the initial phase by proteins with delayed release of alloying elements. The main corrosion product formed was magnesium carbonate. Therefore, cell culture conditions are proposed as first step toward physiological corrosion.
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Frank Feyerabend and Heiko Drücker have contributed equivalently.
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Feyerabend, F., Drücker, H., Laipple, D. et al. Ion release from magnesium materials in physiological solutions under different oxygen tensions. J Mater Sci: Mater Med 23, 9–24 (2012). https://doi.org/10.1007/s10856-011-4490-5
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DOI: https://doi.org/10.1007/s10856-011-4490-5