Table 1.
Classifications of chondral lesions [8]
| Outerbridge |
|---|
| Grade 0: normal articular cartilage |
| Grade I: softening, blistering or swelling of the cartilage |
| Grade II: partial thickness fissures and clefts <1 cm diameter |
| Grade III: full thickness fissures, to subchondral bone >1 cm diameter |
| Grade IV: exposed subchondral bone |
| International Cartilage Repair Society (ICRS) |
|---|
| I: superficial fissure |
| II: <50% depth |
| III: 50% to full thickness loss |
| IV: osteochondral lesion extends through bone |
| V: osteochondritis dissecans lesion (OCD) |
| VI: avascular necrosis (AVN) |
| Bauer–Jackson descriptive (I–IV traumatic/V–VI degenerative) |
|---|
| I: linear |
| II: stellate |
| III: chondral flap |
| IV: chondral crater |
| V: fibrillation |
| VI: exposed subchondral bone |
| International Cartilage Repair Society (ICRS) |
|---|
| I: superficial fissure |
| II: <50% depth |
| III: 50% to full thickness loss |
| IV: osteochondral lesion extends through bone |
| V: osteochondritis dissecans lesion (OCD) |
| VI: avascular necrosis (AVN) |
| Bauer–Jackson descriptive (I–IV traumatic/V–VI degenerative) |
|---|
| I: linear |
| II: stellate |
| III: chondral flap |
| IV: chondral crater |
| V: fibrillation |
| VI: exposed subchondral bone |