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Biological evaluation of selective laser melted magnesium alloy powder
Andrzej Paweł Pawlak1, Patrycja Ewa Szymczyk-Ziółkowska1, Adam Junka2
1Centre for Advanced Manufacturing Technologies, Wrocław University of Science and Technology, Wrocław, Poland.
Purpose:
The current study examined magnesium alloy AZ31B specimens manufactured with Additive Manufacturing method (selective laser melting - SLM) to investigate the applicability of this technology for the production of medical devices.
Methods:
Osteoblast cells and bacterial biofilm growth ability on specimen was examined and the effect of surface state on corrosion resistance was evaluated by electrochemical and immersion methods.
Results:
High survival of hFOB cells, as well as a strong tendency for Pseudomonas aeruginosa and Staphylococcus aureus biofilm proliferation on the surface of the tested specimens were shown. SLM-processed AZ31B alloy has a higher corrosion resistance in 0.9% NaCl solution and in a multi-electrolyte saline solution than the material in a conventional form of a rolled sheet.
Conclusions:
It has been demonstrated that the strong development of the surface of as-built processed specimens results in a significantly increased corrosion rate, which hinders the production of complex structures in tissue engineering products that support cell ingrowth.
