Table 2.
Stages in root development of maxillary canine and lateral incisor and dental age vs. overlapping of canines with the lateral incisor root in the natural eruption of maxillary canines
| Grade 0c | Grade 1c | Grade 2c | Total | P valued | ||||
|---|---|---|---|---|---|---|---|---|
| n | (%) | n | (%) | n | (%) | n | ||
| Canine root developmenta | ||||||||
| Stage 1 | 52 | (55.9) | 37 | (39.8) | 4 | (4.3) | 93 | |
| Stage 2 | 436 | (52.3) | 379 | (45.5) | 18 | (2.2) | 833 | |
| Stage 3 | 234 | (62.1) | 138 | (36.6) | 5 | (1.3) | 377 | |
| Stage 4 | 76 | (65.5) | 39 | (33.6) | 1 | (0.9) | 116 | |
| Total | 798 | (56.2) | 593 | (41.8) | 28 | (2.0) | 1419 | 0.007 |
| Lateral incisor developmenta | ||||||||
| Incomplete | 607 | (54.4) | 484 | (43.4) | 25 | (2.2) | 1116 | |
| Complete | 180 | (64.1) | 98 | (34.9) | 3 | (1.1) | 281 | |
| Total | 787 | (56.3) | 582 | (41.7) | 28 | (2.0) | 1397 | 0.01 |
| Dental ageb | ||||||||
| Normal | 720 | (56.2) | 536 | (41.8) | 25 | (2.0) | 1281 | |
| Delayed | 32 | (47.1) | 33 | (48.5) | 3 | (4.4) | 68 | |
| Total | 752 | (55.7) | 569 | (42.2) | 28 | (2.1) | 1349 | 0.171 |
aDivision is based on developmental stages of Nolla’s method (1960)
bDental age is assessed for children by Demirjian’s method (Demirjian et al. 1973; Demirjian and Goldstein 1976) and it was same for both maxillary canines
cGrade 0 (no overlapping), Grade 1 (≤ ½ overlapping) and Grade 2 (> ½ overlapping)
dPearson’s Chi-square test