Table 1 Features of lower third molar teeth related to age of patients
From: Impaction of lower third molars and their association with age: radiological perspectives
Age | Impacted lower third molar teeth | Winter’s classification Number (%) | RM space | Mesial root | Distal root | Pell-Gregory ramus Class 1 | Pell-Gregory ramus level B | Distance to occlusal line | Distance of apexes to IAC | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Number | H | MA | V | Mean ± SD | Mean ± SD | Mean ± SD | Mean ± SD | (%) | (%) | Mean ± SD | Mean ± SD | |
18 | 222 | 32 (14.4) | 165 (74.3) | 25 (11.3) | 40.0 ± 23.4 | 6.4 ± 1.2 | 2.9 ± 1.6 | 2.1 ± 1.5 | 0 | 0 | 12.5 ± 3.6 | 1.7 ± 1.1 |
19 | 205 | 42 (20.5) | 134 (65.4) | 29 (14.1) | 37.2 ± 24.8 | 6.8 ± 1.2 | 3.4 ± 1.6 | 2.6 ± 1.4 | 4.4 | 2.4 | 12.6 ± 3.3 | 2.0 ± 1.2 |
20 | 208 | 61 (29.3) | 112 (53.8) | 35 (16.8) | 37.8 ± 27.0 | 7.4 ± 1.2 | 5.0 ± 1.7 | 3.6 ± 1.4 | 8.7 | 8.7 | 11.7 ± 3.2 | 2.3 ± 1.3 |
21 | 203 | 20 (9.9) | 135 (66.5) | 48 (23.6) | 49.0 ± 27.7 | 7.8 ± 1.2 | 5.5 ± 1.6 | 4.9 ± 1.7 | 13.8 | 25.6 | 10.4 ± 3.3 | 2.4 ± 1.2 |
22 | 202 | 35 (17.3) | 122 (60.4) | 45 (22.3) | 43.8 ± 28.1 | 8.4 ± 1.3 | 6.0 ± 1.8 | 5.7 ± 1.7 | 25.7 | 31.7 | 9.9 ± 3.4 | 2.6 ± 1.3 |
23 | 217 | 22 (10.1) | 133 (61.3) | 62 (28.6) | 49.8 ± 28.0 | 8.8 ± 1.3 | 7.0 ± 1.8 | 6.9 ± 1.7 | 33.2 | 52.1 | 7.6 ± 3.4 | 2.6 ± 1.2 |
24 | 205 | 20 (9.8) | 145 (70.7) | 40 (19.5) | 45.8 ± 25.5 | 9.0 ± 1.2 | 8.1 ± 1.7 | 7.8 ± 1.5 | 38.0 | 48.8 | 7.7 ± 3.4 | 2.6 ± 1.2 |
25 | 166 | 18 (10.8) | 122 (73.5) | 26 (15.7) | 43.6 ± 24.4 | 9.6 ± 1.2 | 9.9 ± 1.4 | 9.6 ± 1.4 | 45.8 | 47.0 | 8.2 ± 3.5 | 2.7 ± 1.2 |
26 | 182 | 23 (12.6) | 128 (70.3) | 31 (17.0) | 44.2 ± 26.3 | 10.0 ± 1.3 | 9.9 ± 1.4 | 9.6 ± 1.5 | 54.9 | 54.9 | 7.2 ± 3.4 | 2.8 ± 1.2 |