TABLE 1.

International Cartilage Repair Society (ICRS) Grading

Grade	Properties
1	Superficial lesions, issues, cracks, and indentations
2	Fraying, lesions extending down to <50% of cartilage depth
3	Partial loss of cartilage thickness, cartilage defects extending down >50% of cartilage depth as well as down to calcified layer
4	Complete loss of cartilage thickness