Open Access
Table I
Pederson difficulty index [11].
| Variable | Classification | Value |
|---|---|---|
| Position of the molar | Mesioangular | 1 |
| Horizontal | 2 | |
| Vertical | 3 | |
| Distoangular | 4 | |
| Relative depth | Class A | 1 |
| Class B | 2 | |
| Class C | 3 | |
| Relation with ramus and available space | Class 1 | 1 |
| Class 2 | 2 | |
| Class 3 | 3 | |
| Difficulty score | Total | |
| Easy | 3–4 | |
| Moderate | 5–6 | |
| Difficult | 7–10 | |
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