Table 1.
Descriptive statistics of the study sample.
| Study Sample n (%) | |
|---|---|
| Patients | 172 (100) |
| M3M | 266 (100) |
| 3.8 | 128 (48.1) |
| 4.8 | 138 (51.9) |
| Gonial angle (°) | 122.6 ± 4.8 |
| H-GA | 126.8 ± 2.8 |
| L-GA | 118.8 ± 2.5 |
| Age (years) | 26.3 ± 4.6 |
| Sex | |
| Male | 169 (63.5) |
| Ramus length (mm) | 67.8 ± 6.2 |
| Ramus width (mm) | 31.2 ± 3.0 |
| Ramus divergency (°) | 65.5 ± 22.9 |
| Retromolar space (mm) | 11.5 ± 2.1 |
| JD classification | |
| M | |
| 0 | 148 (55.6) |
| 1 | 53 (20) |
| 2 | 50 (18.8) |
| 3 | 15 (5.6) |
| R | |
| 0 | 145 (54.5) |
| 1 | 59 (22.2) |
| 2 | 39 (14.7) |
| 3 | 23 (8.6) |
| A | |
| 0 | 132 (49.7) |
| 1 | 36 (13.5) |
| 2 | 54 (20.3) |
| 3 | 44 (16.5) |
| C | |
| 0 | 90 (33.8) |
| 1 | 108 (40.6) |
| 2 | 45 (16.9) |
| 3 | 23 (8.7) |
| B | |
| 0 | 4 (1.5) |
| 1 | 75 (28.2) |
| 2 | 105 (39.5) |
| 3 | 82 (30.8) |
| S | |
| 0 | 141 (53) |
| 1 | 86 (32.3) |
| 2 | 14 (5.3) |
| 3 | 25 (9.4) |
| JD score | |
| 0–6 | 154 (57.9) |
| 7–12 | 83 (31.2) |
| 13–18 | 29 (10.9) |
M3M = lower third molar; H-GA = High gonial angle; L-GA = Low gonial angle; JD = Juodzbalys and Daugela classification; M = second molar; R = mandibular ramus; A = alveolar crest; C = inferior alveolar nerve (IAN); B = buccal or lingual wall; S = spatial position.