IOTN Grade 2 (Little Need)
This grade indicates little need for treatment and can be classified as follows:
| 2a | Increased overjet greater than 3.5mm but less than or equal to 6mm with competent lips. |
| 2b | Reverse overjet greater than 0mm but less than or equal to 1mm. |
| 2c | Anterior or posterior crossbites with less than or equal to 1mm discrepancy between retruded contact position and intercuspal position. |
| 2d | Contact point displacements greater than 1mm but less than or equal to 2mm. |
| 2e | Anterior or posterior open bite greater than 1mm but less than or equal to 2mm. |
| 2f | Increased overbite greater than or equal to 3.5mm without gingival contact. |
| 2g | Pre-normal or post-normal occlusions with no other anomalies (includes up to half a unit discrepancy). |