Table 3.
Stages in root development of maxillary canine and lateral incisor and dental age vs. inclination (°) in the natural eruption of maxillary canines
| < 15 | 15–19.9 | 20–24.9 | ≥ 25 | Total | P valuec | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| n | (%) | n | (%) | n | (%) | n | (%) | n | ||
| Canine root developmenta | ||||||||||
| Stage 1 | 55 | (59.1) | 19 | (20.4) | 13 | (14.0) | 6 | (6.5) | 93 | |
| Stage 2 | 492 | (58.6) | 189 | (22.5) | 96 | (11.4) | 63 | (7.5) | 840 | |
| Stage 3 | 301 | (80.1) | 53 | (14.1) | 15 | (4.0) | 7 | (1.9) | 376 | |
| Stage 4 | 90 | (79.6) | 12 | (10.6) | 9 | (8.0) | 2 | (1.8) | 113 | |
| Total | 938 | (66.0) | 273 | (19.2) | 133 | (9.4) | 78 | (5.5) | 1422 | < 0.001 |
| Lateral incisor developmenta | ||||||||||
| Incomplete | 692 | (61.8) | 240 | (21.4) | 118 | (10.5) | 69 | (6.2) | 1119 | |
| Complete | 232 | (83.2) | 26 | (9.3) | 15 | (5.4) | 6 | (2.2) | 279 | |
| Total | 924 | (66.1) | 266 | (19.0) | 133 | (9.5) | 75 | (5.4) | 1398 | < 0.001 |
| Dental ageb | ||||||||||
| Normal | 860 | (67.0) | 241 | (18.8) | 116 | (9.0) | 67 | (5.2) | 1284 | |
| Delayed | 33 | (48.5) | 20 | (29.4) | 10 | (14.7) | 5 | (7.4) | 68 | |
| Total | 893 | (66.1) | 261 | (19.3) | 126 | (9.3) | 72 | (5.3) | 1352 | 0.019 |