IOM group (n = 173)a | Control group (n = 95) | p | |
Number (%) | Number (%) | ||
Mandibular overjet (HO ≤ 0 mm) | 1 (0.6) | 0 | < 0.001 |
Neutral overjet (0 < HO ≤ 5 mm) | 83 (49.1) | 76 (80.0) | |
Maxillary overjet (5 < HO < 9 mm) | 52 (30.8) | 17(17.9) | |
Extreme maxillary overjet (HO ≥ 9 mm) | 34 (20.1) | 2 (2.1) | |
Neutral overbite (0 ≤ VO ≤ 4) | 139 (83.7) | 85 (89.5) | 0.226 |
Deep bite (VO ≥ 5 mm) | 17 (10.2) | 4 (4.2) | |
Frontal open bite (VO < 0) | 10 (6.0) | 6 (6.3) | |
Molar occlusion | |||
Mesial (one or both sides) | 19 (11.0) | 0 | < 0.001 |
Distal (one or both sides) | 4 (2.3) | 4 (4.2) | 0.382 |
Cross bite (one or both sides) | 14 (8.1) | 12 (12.6) | 0.230 |
Scissor bite (one or both sides) | 5 (2.9) | 3 (3.2) | 0.902 |
Mean (SD) [95% CI] | Mean (SD) [95% CI] | p | |
Horizontal overjet (mm) | 5.9 (2.8) [5.5–6.4] | 4.1 (SD 1.9) [3.7–4.5] | < 0.001 |
Vertical overbite (mm) | 2.3 (2.4) [1.1–2.6] | 2.0 (SD 1.8) [1.6–2.3] | 0.298 |