Selective Laser-Melted Radially Graded Fe-35Mn Scaffolds: Microstructure, Mechanical Properties, Degradation Behavior, and Sustained Release of Human Bone Morphogenetic Protein-2

). Moreover, the BMP-2-loaded scaffolds display a biphasic release behavior, characterized by an initial burst release up to 168 h followed by a slower, sustained release from 168 to 456 h. Overall, these results demonstrate that radially graded porous Fe-35Mn scaffolds combine favorable mechanical compatibility, tunable biodegradation, and sustained growth factor delivery, highlighting their potential as biodegradable load-bearing scaffolds for bone regeneration.