Fig. 1From: Effects of osteochondral defect size on cartilage regeneration using a double-network hydrogelHow to induce cartilage regeneration. a Cylindrical osteochondral defects of the femoral trochlea of 2.5 mm diameter in Group-I (G-I), 4.3 mm in Group-II (G-II), and 5.8 mm in Group-III (G-III) were created. b Schematic cross-section of an osteochondral defect with an implanted plug. Note that a 2-mm deep vacant space from the cartilage surface remained after the surgeryBack to article page