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Cartilage evaluation according to the Mankin system (Mankin et al., 1971).
| Criteria | Score | Histological finding |
|---|---|---|
| Structure | 0 | Smooth intact surface |
| 1 | Slight surface irregularities | |
| 2 | Pannus/surface fibrillation | |
| 3 | Clefts into the transitional zone | |
| 4 | Clefts into the radial zone | |
| 5 | Clefts into the calcified zone | |
| 6 | Total disorganization | |
| Cells | 0 | Uniform cell distribution |
| 1 | Diffuse cell proliferation | |
| 2 | Cell clustering | |
| 3 | Cell loss | |
| Tidemark integrity | 0 | Intact |
| 1 | Vascularity |
