Figure 3From: Bone regenerative medicine: classic options, novel strategies, and future directionsSEM images. Alginate (A), alginate-chitosan (B), chitosan (C), chitosan-collagen (D), mesenchymal stem cells cultured on the scaffold collagen (C)-dl-lactic acid-glycolic acid (PLGA) (P) medium (E), and synthesized porous HA scaffold (F). The scaffolds used for bone tissue engineering must be porous (scalebars ( A-D, F ) 100 μm, ( E) 500 μm).Back to article page