Fig. 1From: Effects of electromagnetic fields treatment on rat critical-sized calvarial defects with a 3D-printed composite scaffoldExhibition of the nozzle-deposition system. a 3D printing device for fabricating PLA/HA composite scaffolds. b Gross observation of the cubic scaffold, each unit of the scale indicates 1 mm. c Gross observation of the cylindrical scaffold, each unit of the scale indicates 1 mmBack to article page