Fig. 2From: Hierarchical porous ECM scaffolds incorporating GDF-5 fabricated by cryogenic 3D printing to promote articular cartilage regenerationPreparation and characterization of the ECM bioinks and scaffolds with different ECM concentrations. A and B Gelation status of ECM bioinks at five concentrations; C Particle size distributions of 5, 7 and 9% ECM bioinks; D FTIR spectra of ECM bioinks; E Rheological characterization of ECM bioinks; F Macroscopic and SEM images of 5, 7 and 9% pure ECM scaffolds; G Pore size distributions of ECM scaffoldsBack to article page