Fig. 2
From: Effects of osteochondral defect size on cartilage regeneration using a double-network hydrogel
Gross observations of the joint surface at 2, 4, and 12 weeks. At 2 weeks, the defects in G-I and II with the DN gel were insufficiently filled with pinkish white tissue and other defects were not filled with regenerated tissue. At 4weeks, the defects in G-I with DN gel and the untreated controls, and G-II and III with DN gel were filled with a white opaque tissue, while the defects in G-II and III of the untreated controls were partly filled with white or reddish, patchy tissue with an irregular surface. At 12 weeks, the defects in G-I with DN gel and the untreated controls, and G-II and III with DN gel were filled with a white opaque tissue, while the surface of the regenerated tissue in G-III with DN gel were somewhat irregular. The defects in the G-II and III untreated controls were insufficiently filled with white or reddish, patches of tissue with an irregular surface