Figure 1
The prediction equations for calculation of the ICON score via acquired DAI score, separately for mixed and permanent dentition.
Table 1
Distribution of the ICON degrees with cut-off point of 43 between dentition types within the DAI categories (0=Normal, 1=Definite, 2=Severe, 3=Handicapping).
| DAI categories | Dentition type | ICON cut-off point of 43 | Total | p* | OR (95% CI) | τ-b | ||
|---|---|---|---|---|---|---|---|---|
| No treatment need | Treatment needed | |||||||
| 0 | Mixed | N | 179 | 48 | 227 | |||
| % | 78.9 | 21.1 | 100.0 | |||||
| Permanent | N | 1265 | 115 | 1380 | ||||
| % | 91.7 | 8.3 | 100.0 | <0.001 | 2.54(1.87-3.45) | -0.148 | ||
| Total | N | 1444 | 163 | 1607 | ||||
| % | 89.9 | 10.1 | 100.0 | |||||
| 1 | Mixed | N | 79 | 36 | 115 | |||
| % | 68.7 | 31.3 | 100.0 | |||||
| Permanent | N | 277 | 94 | 371 | 0.228 | 1.24(0.90-1.71) | -0.057 | |
| % | 74.7 | 25.3 | 100.0 | |||||
| Total | N | 356 | 130 | 486 | ||||
| % | 73.3 | 26.7 | 100.0 | |||||
| 2 | Mixed | N | 29 | 38 | 67 | |||
| % | 43.3 | 56.7 | 100.0 | |||||
| Permanent | N | 110 | 68 | 178 | ||||
| % | 61.8 | 38.2 | 100.0 | 0.014 | 1.49(1.12-1.97) | -0.167 | ||
| Total | N | 139 | 106 | 245 | ||||
| % | 56.7 | 43.3 | 100.0 | |||||
| 3 | Mixed | N | 24 | 44 | 68 | |||
| % | 35.3 | 64.7 | 100.0 | |||||
| Permanent | N | 92 | 99 | 191 | ||||
| % | 48.2 | 51.8 | 100.0 | 0.088 | 1.25(0.99-1.56) | -0.114 | ||
| Total | N | 116 | 143 | 259 | ||||
| % | 44.8 | 55.2 | 100.0 | |||||
Table 2
Distribution of orthodontic treatment need in schoolchildren who were not undergoing orthodontic treatment at the time of the study, with respect to dentition type and previous orthodontic treatment, with the ICON cut-off point of 43.
| Dentition type | Previous treatment | ICON cut-off point of 43 | Total | p | ||
|---|---|---|---|---|---|---|
| No treatment need Treatment needed | ||||||
| Mixed | No | N | 264 | 136 | 400 | |
| % | 66.0 | 34.0 | 100.0 | |||
| Yes | N | 17 | 11 | 28 | 0.545 | |
| % | 60.7 | 39.3 | 100.0 | |||
| Total | N | 281 | 147 | 428 | ||
| % | 65.7 | 34.3 | 100.0 | |||
| Permanent | No | N | 1115 | 236 | 1351 | |
| % | 82.5 | 17.5 | 100.0 | |||
| Yes | N | 326 | 79 | 405 | 0.376 | |
| % | 80.5 | 19.5 | 100.0 | |||
| Total | N | 1441 | 315 | 1756 | ||
| % | 82.1 | 17.9 | 100.0 | |||
* Fischer exact test
Table 3
Distribution of the ICON categories (0=Easy, 1=Mild, 2=Moderate, 3=Difficult, 4=Very Difficult) in schoolchildren who were not undergoing orthodontic treatment at the time of the study, with respect to dentition type and previous orthodontic treatment.
| Dentition type | Previous treatment | ICON complexity | Total | p* | |||||
|---|---|---|---|---|---|---|---|---|---|
| 0 | 1 | 2 | 3 | 4 | |||||
| Mixed | No | N | 143 | 166 | 47 | 23 | 21 | 400 | |
| % | 35.8 | 41.5 | 11.8 | 5.8 | 5.3 | 100.0 | |||
| Yes | N | 10 | 10 | 5 | 2 | 1 | 28 | ||
| % | 35.7 | 35.7 | 17.9 | 7.1 | 3.6 | 100.0 | 0.870 | ||
| Total | N | 153 | 176 | 52 | 25 | 22 | 428 | ||
| % | 35.7 | 41.1 | 12.1 | 5.8 | 5.1 | 100.0 | |||
| Permanent | No | N | 737 | 469 | 72 | 45 | 28 | 1351 | |
| % | 54.6 | 34.7 | 5.3 | 3.3 | 2.1 | 100.0 | |||
| Yes | N | 221 | 129 | 27 | 17 | 11 | 405 | 0.561 | |
| % | 54.6 | 31.9 | 6.7 | 4.2 | 2.7 | 100.0 | |||
| Total | N | 958 | 598 | 99 | 62 | 39 | 1756 | ||
| % | 54.6 | 34.1 | 5.6 | 3.5 | 2.2 | 100.0 | |||
Table 4
Distribution of the DAI categories (0=Normal, 1=Definite, 2=Severe, 3=Handicapping) in schoolchildren who were not undergoing orthodontic treatment at the time of the study, with respect to previous orthodontic treatment.
| Dentition type | Previous treatment | ICON complexity | Total | p1 | ||||
|---|---|---|---|---|---|---|---|---|
| 0 | 1 | 2 | 3 | |||||
| Mixed | No | N | 191 | 104 | 54 | 60 | 409 | |
| % | 46.7 | 25.4 | 13.2 | 14.7 | 100.0 | |||
| Yes | N | 18 | 5 | 2 | 3 | 28 | ||
| % | 64.3 | 17.9 | 7.1 | 10.7 | 100.0 | 0.343 | ||
| Total | N | 209 | 109 | 56 | 63 | 437 | ||
| % | 47.8 | 24.9 | 12.8 | 14.4 | 100.0 | |||
| Permanent | No | N | 925 | 243 | 109 | 97 | 1374 | |
| % | 67.3 | 17.7 | 7.9 | 7.1 | 100.0 | |||
| Yes | N | 265 | 70 | 31 | 48 | 414 | ||
| % | 64.0 | 16.9 | 7.5 | 11.6 | 100.0 | 0.032 | ||
| Total | N | 1190 | 313 | 140 | 145 | 1788 | ||
| % | 66.6 | 17.5 | 7.8 | 8.1 | 100.0 | |||
Figure 2
Distribution of gingivitis and caries in the population, separately for schoolchildren in mixed and permanent dentition.