| Feature |
Score |
| Surface |
Smooth/continuous |
3 |
| Discontinuities/irregulatrity |
0 |
| Matrix |
Hyaline |
3 |
| Mixture; hyaline/fibrocartilage |
2 |
| Fibrocartilage |
1 |
| Fibrous tissue |
0 |
| Cell distribution |
Columnar |
3 |
| Mixed/columnar clusters |
2 |
| Clusters |
1 |
| Individual cells/disorganized |
0 |
| Viabilityof cell population |
Predominantly viable |
3 |
| Partially viable |
1 |
| <10% viable |
0 |
| Subchondral bone |
Normal |
3 |
| Increased remodeling |
2 |
| Bone necrosis/granulation tissue |
1 |
| Detached/fractue/callus at base |
0 |
Cartilage mineralization
(calcified cartilage) |
Normal |
3 |
| Abnormal/inappropriate location |
0 |
| Average |
(0-3) |
