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. 2021 Dec 18;7(4):274. doi: 10.3390/gels7040274

Figure 1.

Figure 1

Osteochondral defect grades. (A) Normal cartilage (grade 0), (B) Moderate lesion (grade I: partial-thickness defects), (C) Sever lesion (grade III: full-thickness defects), (D) Very sever lesion (grade IV: osteochondral defect) [24,30,31].