Fig. 3

Bioprinted micro/macroporous hydrogel. a Representative SEM image of printed pore-forming hydrogel. 1) The pore structure immediately after printing, scale bar = 500 μm. 2) and after incubation for 1 day (after releasing the gelatin), scale bar = 100 μm. b Micro pore size of the pore-forming hydrogel. c Semi-quantification of printability. d Shrinkage rate of hydrogel, scale bar = 5 mm. [n = 4, NS: no significant difference, ***p < 0.001]