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Histological features measured for OsScore
| Feature | Score |
| Tissue morphology | Hyaline = 3 |
| Hyaline/fibrocartilage = 2 | |
| Fibrocartilage = 1 | |
| Fibrous tissue = 0 | |
| Matrix staining | Near normal = 1 |
| Abnormal = 0 | |
| Surface architecture | Near normal = 2 |
| Moderately irregular = 1 | |
| Very irregular = 0 | |
| Chondrocyte clusters | None = 1 |
| ≤ 25% cells = 0.5 | |
| >25% cells = 0 | |
| Mineral | Absent = 1 |
| Present = 0 | |
| Blood vessels | Absent = 1 |
| Present = 0 | |
| Basal integration | Good = 1 |
| Poor = 0 | |
| Maximum total possible | 10 |
