Table 2 Prevalence of occlusal features in the 5 years old sample
From: Occlusal features of 5-year-old Greek children: a cross-sectional national study
Occlusal features | N (%) | Sex | ||
|---|---|---|---|---|
Male | Female | |||
Right primary second molar relationship n = 1222 | Flush terminal plane | 628 (51.4) | 297 (47.3) | 331 (52.7) |
Distal step | 298 (24.4) | 144 (48.3) | 154 (51.7) | |
Mesial step | 285 (23.3) | 149 (52.3) | 136 (47.7) | |
Unspecified | 11 (0.9) | 5 (45.5) | 6 (54.5) | |
Left primary second molar relationship n = 1220 | Flush terminal plane | 664 (54,4) | 320 (48.1) | 344 (51.8) |
Distal step | 268 (22.0) | 122 (45.5) | 146 (54.5) | |
Mesial step | 272 (22.3) | 143 (52.6) | 129 (47.4) | |
Unspecified | 16 (1.3) | 8 (50.0) | 8 (50) | |
Right primary canine relationship n = 1220 | Class I | 732 (60.0) | 358 (48.9) | 374 (51.1 |
Class II | 429 (35.2) | 207 (48.3 | 222 (51.7 | |
Class III | 49 (4.0) | 26 (53.0) | 23 (47.0) | |
Unspecified | 10 (0.8) | 3 (30.0) | 7 (70.0) | |
Left primary canine relationship n = 1219 | Class I | 771 (63.2) | 368 (47.7) | 403 (52.3) |
Class II | 396 (32.5) | 196 (49.5) | 200 (50.5) | |
Class III | 43 (3.5) | 26 (60.4) | 17 (39.6) | |
Unspecified | 9 (0.7) | 3 (33.3) | 6 (66.7) | |
Overjet n = 1221 | Reverse | 20 (1.6) | 10 (50.0) | 10 (50.0) |
Normal (0–2 mm) | 566 (46.4) | 274 (48.4) | 292 (51.6) | |
Increased (> 2 mm) | 461 (37.8) | 237 (51.4) | 292 (63.3) | |
Zero | 12 (1.0) | 3 (25.0) | 9 (75.0) | |
Unspecified | 162 (13.3) | 70 (43.2) | 92 (56.8) | |
Overbite n = 1220 | Open bite | 58 (4.75) | 26 (44.8) | 32 (55.2) |
Normal (0–2 mm) | 490 (40.2) | 233 (47.6) | 257 (52.4) | |
Increased (> 2 mm) | 489 (40.1) | 254 (51.9) | 235 (48.1) | |
Zero | 23 (1.9) | 10 (43.5) | 13 (56.5) | |
Unspecified | 160 (13.1) | 71 (44.4) | 89 (55.6) | |
Anterior crossbite n = 1220 | Yes | 59 (4.8) | 31 (52.5) | 28 (47.5) |
No | 1161 (95.2) | 563 (48.5) | 598 (51.5) | |
Posterior crossbite n = 1221 | Unilaterally | 107 (8.8) | 51 (47.7) | 56 (52.3) |
On both sides | 15 (1.2) | 8 (53.3) | 7 (46.7) | |
No | 1099 (90.0) | 536 (48.8) | 563 (51.2) | |
Maxillary spacing n = 1219 | No | 352 (28.9) | 168 (47.7) | 184 (52.3) |
Yes | 867 (71.1) | 427 (49.3) | 440 (50.7) | |
Mandibular spacing n = 1219 | No | 531 (43.6) | 259 (48.8) | 272 (51.2) |
Yes | 688 (56.4) | 336 (48.8) | 352 (51.2) | |