Open Access
Table II
The Pernambuco index [12].
| Variable | Classification | Value |
|---|---|---|
| Level of the occlusal plane (Pell and Gregory) | A | 1 |
| B | 2 | |
| C | 3 | |
| Available retromolar space (Pell and Gregory) | I | 1 |
| II | 2 | |
| III | 3 | |
| Impaction angle (Winter) | Vertical | 1 |
| Mesioangular | 2 | |
| Horizontal | 3 | |
| Distoangular | 4 | |
| Root curvature | Non-dilacerated | 1 |
| Dilacerated | 2 | |
| Number of roots | One fused root | 1 |
| 2 or more roots | 2 | |
| Tooth germ | 3 | |
| Relationship to second molar | No contact | 1 |
| Contact with crown alone | 2 | |
| Contact with root | 3 | |
| Age (years) | ˂ 25 | 1 |
| ≥ 25 | 2 | |
| BMI (kg\m2) | 18.5–24.9 (ideal weight range) | 1 |
| 25 and more (overweight) | 2 | |
| Surgical difficulty | Index score | |
| Low | 8–12 | |
| Moderate | 12–17 | |
| High | 18–22 | |
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