Fig. 1From: Engineering zonal cartilage through bioprinting collagen type II hydrogel constructs with biomimetic chondrocyte density gradientImages of the CAD model and the collagen type II hydrogel constructs. a Cylinder generated by CAD (4Â mm radius and 6Â mm height). b Printing on a sterile platform. c Constructs cultured in a 24-well plate. d Construct harvested at 3Â weeksBack to article page