Table 2.
Prevalence and distribution of anomalies according to teeth number, shape, and location among children (N = 1897).
| (1) Prevalence of anomalies according to number of teeth, n (%) | |
| Supernumerary teeth: prevalence | 9 (0.5) |
| Location | |
| Anterior | 7 (77.8) |
| Posterior | 1 (11.1) |
| Both | 1 (11.1) |
|
| |
| Number of supernumeraries per patient | |
| One | 8 (88.9) |
| ≥2 | 1 (11.1) |
|
| |
| Congenitally missing permanent teeth: prevalence | 103 (5.4) |
| Location | |
| Anterior | 34 (33.0) |
| Posterior | 64 (62.1) |
| Both | 5 (4.9) |
|
| |
| Number of congenitally missing permanent teeth per patient | |
| One | 42 (40.8) |
| ≥2 | 61 (59.2) |
|
| |
| (2) Prevalence of anomalies according to shape of teeth, n (%) | |
| Gemination: prevalence | 5 (0.3) |
| Number of geminated teeth per patient | |
| One | 5 (100) |
| ≥2 | 0 |
|
| |
| Fusion: prevalence | 1 (0.1) |
| Number of fused teeth per patient | |
| One | 1 (100) |
| ≥2 | 0 |
|
| |
| Peg lateral: prevalence | 20 (1.1) |
| Number of peg laterals per patient | |
| One | 16 (80) |
| ≥2 | 4 (40) |
|
| |
| (3) Prevalence of anomalies according to position of teeth, n (%) | |
| Rotation: prevalence | 464 (24.5) |
| Location | |
| Anterior | 405 (87.3) |
| Posterior | 38 (8.2) |
| Both | (4.5) |
|
| |
| Number of rotated teeth per patient | |
| One | 262 (56.5) |
| ≥2 | 202 (43.5) |
|
| |
| Ectopic eruption: prevalence | 113 (6) |
| Number of ectopic-erupted teeth per patient | |
| One | 86 (76.1) |
| ≥2 | 27 (23.9) |