Table 2.
The numbers and percentages of tooth agenesis for each tooth type in the maxillary and mandibular arches
| Tooth type | Maxillary arch | Mandibular arch | Total, | Chi-square value | P value |
|---|---|---|---|---|---|
| n (% of maxillary teeth) | n (% of mandibular teeth) | n (% of total) | |||
| Central incisor | 2 (2.4) | 12 (8.8) | 14 (6.4) | 3.617 | 0.057a |
| Lateral incisor | 35 (41.7) | 51 (37.5) | 86 (39.1) | 0.379 | 0.538a |
| Canine | 4 (4.7) | 3 (2.2) | 7 (3.2) | – | 0.432b |
| First premolar | 20 (23.8) | 15 (11) | 35 (15.9) | 6.34 | 0.012a |
| Second premolar | 22 (26.2) | 55 (40.5) | 77 (35) | 4.635 | 0.031a |
| First molar | 1 (1.2) | 0 (0) | 1 (0.4) | – | 0.382b |
| Second molar | 0 (0) | 0 (0) | 0 (0) | – | – |
| Total n (% of total) | 84 (38.2) | 136 (61.8) | 220 (100) |
aChi-square test
bFisher exact test. A significant difference (P < 0.05) indicates in bold italics