Table 4.
Evaluation of the prevalence of crowding presenting with orthodontic treatment (T1) and the initial Pell and Gregory classification (T0)
| Dental crowding | |||||||
|---|---|---|---|---|---|---|---|
| Variable | Present | Absent | Total | p value | |||
| n | % | N | % | n | % | ||
| • Orthodontic treatment—T1 | |||||||
| In implementation | – | – | 6 | 100.0 | 6 | 100.0 | p a = 0.039* |
| Completed without lingual retainer | 5 | 55.6 | 4 | 44.4 | 9 | 100.0 | |
| Completed with contention | 1 | 12.5 | 7 | 87.5 | 8 | 100.0 | |
| Not completed | 1 | 50.0 | 1 | 50.0 | 2 | 100.0 | |
| Not taken | 1 | 100.0 | – | – | 1 | 100.0 | |
| • Pell and Gregory—T0 | |||||||
| IIB | 3 | 21.4 | 11 | 78.6 | 14 | 100.0 | p a = 0.039* |
| IIIB | 4 | 66.7 | 2 | 33.3 | 6 | 100.0 | |
| IC | – | – | 6 | 100.0 | 6 | 100.0 | |
| IIC | 7 | 50.0 | 7 | 50.0 | 14 | 100.0 | |
Obs.: Relative risk was not determined due to the occurrence of zero or very low frequencies
n Number of teeth
*Significant difference at 5 %
aFisher’s exact test