Table 2. Distribution of sample according to type of malocclusion, treatment need, and dentition status (n = 480) in schoolchildren from 8 to 10 years from Mexico.
| n | % | |
|---|---|---|
| Missing anterior teeth | ||
| Maxillary dental arch | 134 | 27.9 |
| Mandibular dental arch | 85 | 17.7 |
| Anterior crowding | ||
| None | 125 | 26.0 |
| One or two segments | 355 | 74.0 |
| Incisal segment spacing | ||
| None | 308 | 64.2 |
| One or two segments | 172 | 35.8 |
| Diastema | ||
| <2mm | 291 | 60.6 |
| ≥ 2 mm | 189 | 39.4 |
| Largest anterior irregularity in the maxilla | ||
| <2mm | 278 | 57.9 |
| ≥ 2 mm | 202 | 42.1 |
| Largest anterior irregularity in the mandible | ||
| <2mm | 348 | 72.5 |
| ≥ 2 mm | 132 | 27.5 |
| Anterior maxillary overjet | ||
| <4 mm | 229 | 47.7 |
| ≥4 mm | 251 | 52.3 |
| Anterior mandibular overjet | ||
| <4 mm | 362 | 75.4 |
| ≥4 mm | 118 | 24.6 |
| Anterior open bite | ||
| <2mm | 459 | 95.6 |
| ≥ 2 mm | 21 | 4.4 |
| Anterior crossbite | ||
| Absent | 261 | 54.4 |
| Present | 219 | 45.6 |
| Orthodontic treatment need | ||
| None | 99 | 20.6 |
| Elective | 150 | 31.3 |
| Highly desirable | 123 | 25.6 |
| Fundamental | 108 | 22.5 |