Table 4 Classification of ORN by Notani et al. [[14]
From: New approach for the treatment of osteoradionecrosis with pentoxifylline and tocopherol
| Grade | Description |
|---|---|
| I | ORN confined to alveolar bone |
| II | ORN limited to the alveolar bone and/or mandible aboce the level of the inferior alveolar canal |
| III | ORN involving the mandible below the level of the inferior alveolar canal and/or skin fistula and/or pathological fracture |