Fig. 7From: Potential use of 3D-printed graphene oxide scaffold for construction of the cartilage layera 3D-printed tissue-transplantation surgery on both knees of animal model. b, c. Polarized optical microscopy result showing the different scaffold zones with cartilage zones. d, e The histological features of chondrocytes with 3D-bioprinted scaffold transplantations after 6 weeks were presented (bar = 200 μm, 50 μm, respectively)Back to article page