|
Category
|
Points
|
|---|
|
Cell morphology
| |
|
Hyaline cartilage
|
4
|
|
Mostly hyaline cartilage
|
3
|
|
Mostly fibrocartilage
|
2
|
|
Mostly non-cartilage
|
1
|
|
Noncartilage only
|
0
|
|
Matrix-staining (metachromasia)
| |
|
Normal (compared with host adjacent cartilage)
|
3
|
|
Slightly reduces
|
2
|
|
Markedly reduced
|
1
|
|
No metachromatic stain
|
0
|
|
Surface regularitya
| |
|
Smooth (>3/4)
|
3
|
|
Moderate (1/2 to 3/4)
|
2
|
|
Irregular (1/4 to 1/2)
|
1
|
|
Severely irregular (<1/4)
|
0
|
|
Thickness of cartilageb
| |
|
2/3 to 4/3
|
3
|
|
5/3 to 4/3
|
2
|
|
1/3 to 2/3 or >5/3
|
1
|
|
<1/3
|
0
|
|
Integration of donor with host adjacent cartilage
| |
|
Both edges integrated
|
2
|
|
One edge integrated
|
1
|
|
Neither edge integrated
|
0
|
|
Total maximum
|
15
|
- aTotal smooth area of the reparative cartilage compared with the entire area of the cartilage defect. bAverage thickness of the reparative cartilage compared with that of the surrounding cartilage.
