Table 3 Distributions of four alveolar bone thicknesses around upper central incisors and p values from Fisher’s exact test for comparisons between Class I and III canine relationships
| Â | Class I | Class III | Total | p |
|---|---|---|---|---|
MBT | ||||
 ≥ 0 < 0.5 mm | 3 (5.6%) | 1 (1.9%) | 4 (3.7%) | 0.699 |
 ≥ 0.5 < 1.0 mm | 31 (57.4%) | 33 (56.6%) | 64 (57.0%) | |
 ≥ 1.0 < 1.5 mm | 18 (33.3%) | 18 (34.0%) | 36 (33.6%) | |
 ≥ 1.5 < 2.0 mm | 2 (3.7%) | 4 (7.5%) | 6 (5.6%) | |
 Total | 54 (100.0%) | 53 (100.0%) | 107 (100.0%) | |
MPT | ||||
 ≥ 0 < 1.5 mm | 2 (3.7%) | 8 (15.1%) | 10 (9.3%) | 0.030* |
 ≥ 1.5 < 3.0 mm | 26 (48.1%) | 31 (58.5%) | 57 (53.3%) | |
 ≥ 3.0 < 4.5 mm | 20 (37.0%) | 13 (24.5%) | 33 (30.8%) | |
 ≥ 4.5 mm | 6 (11.1%) | 1 (1.9%) | 7 (6.5%) | |
 Total | 54 (100.0%) | 53 (100.0%) | 107 (100.0%) | |
ABT | ||||
 ≥ 0 < 1.5 mm | 7 (13.0%) | 2 (3.8%) | 9 (8.4%) | 0.024* |
 ≥ 1.5 < 3.0 mm | 42 (77.8%) | 36 (67.9%) | 78 (72.9%) | |
 ≥ 3.0 < 4.5 mm | 5 (9.3%) | 13 (24.5%) | 18 (16.8%) | |
 ≥ 4.5 mm | 0 (0.0%) | 2 (3.8%) | 2 (1.9%) | |
 Total | 54 (100.0%) | 53 (100.0%) | 107 (100.0%) | |
APT | ||||
 ≥ 0 < 3.0 mm | 0 (0.0%) | 0 (0.0%) | 0 (0.0%) | 0.000* |
 ≥ 3.0 < 6.0 mm | 5 (9.3%) | 19 (35.8%) | 24 (22.4%) | |
 ≥ 6.0 < 9.0 mm | 27 (50.0%) | 30 (56.6%) | 57 (53.3%) | |
 ≥ 9.0 mm | 22 (40.7%) | 4 (7.5%) | 26 (24.3%) | |
 Total | 54 (100.0%) | 53 (100.0%) | 107 (100.0%) | |