Progress of Porous Magnesium Alloy Bone Scaffolds Prepared by Selective Laser Melting.

Magnesium alloys with porous structure are promising for human bone scaffold transplantation due to biodegradability and similar mechanical properties, which is also conducive to the growth, proliferation and differentiation of cells. The preparation of porous magnesium alloy bone scaffolds by Selective Laser Melting(SLM) method in additive manufacturing avoids the morphological and performance defects arising from traditional casting and other processes while precisely controlling porosity and dimensions. This paper presents the feasibility of porous magnesium alloy bone scaffolds for clinical applications and describes the SLM process. The enhancement mechanism is analyzed to clarify the performance advantages of the SLM process for magnesium alloys. The mechanism of action and optimization is also analyzed according to the variation of elements and process parameters. Finally, the bottlenecks of the current process and its factors are summarized, and the directions of improvement and future development trends are proposed to realize its medical industrial applications. [ABSTRACT FROM AUTHOR]