Fig. 3

SEM images showing the porous structure of the obtained scaffolds. It is possible to observe the gradient on the content of hydroxyapatite from A (Top surface) to C (Bottom surface), B is the image from the lateral side of the scaffold. Images of the scaffold loaded with 0.5 mg/mL are presented as an example of hydroxyapatite gradient in the scaffolds, similar results were observed in all the scaffold containing hydroxyapatite. Magnification 200X, all scales bars are 100 μm