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Table 3 ICRS gross grading scale

From: A preliminary study of osteochondral regeneration using a scaffold-free three-dimensional construct of porcine adipose tissue-derived mesenchymal stem cells

Feature Score Animal no. 1 Animal no. 2
Control site Implanted site Control site Implanted site
Coverage >75% fill 4 2 3 4 4
50%–75% fill 3
25%–50% fill 2
<25% full 1
No fill 0
Neocartilage color Normal 4 1 2 3 4
25% yellow/brown 3
50% yellow/brown 2
75% yellow/brown 1
100% yellow/brown 0
Defect margins Invisible 4 1 2 3 3
25% circumference visible 3
50% circumference visible 2
75% circumference visible 1
Entire circumference visible 0
Surface Smooth/level with normal 4 0 2 3 3
Smooth but raised 3
Irregular 25%–50% 2
Irregular 50%–75% 1
Irregular >75% 0
Average (0–4) 1.0 2.25 3.25 3.5