Table 2. Frequency tables that show single tooth agenesis and the prevalence of right sided, left sided or bilateral agenesis in the whole sample (n = 606).
| Maxilla | |||||
|---|---|---|---|---|---|
| Tooth number* | Present bilaterally (%) | Missing right side (q1) (%) | Missing left side (q2) (%) | Missing unilaterally (%) | Missing bilaterally (%) |
| Agenesis group | |||||
| 1 | 300 (99.0) | 1 (0.3) | 0 (0.0) | 1 (0.3) | 2 (0.7) |
| 2 | 194 (64.0) | 26 (8.6) | 24 (7.9) | 50 (16.5) | 59 (19.5) |
| 3 | 286 (94.4) | 4 (1.5) | 3 (1.0) | 7 (2.5) | 10 (3.3) |
| 4 | 277 (91.4) | 5 (1.7) | 6 (2.0) | 11 (3.7) | 15 (5.0) |
| 5 | 234 (77.2) | 17 (5.6) | 9 (3.0) | 26 (8.6) | 43 (14.2) |
| 6 | 297 (98.0) | 2 (0.7) | 1 (0.3) | 3 (1.0) | 3 (1.0) |
| 7 | 287 (94.7) | 2 (0.7) | 3 (1.0) | 5 (1.7) | 11 (3.6) |
| 8 | 185 (61.1) | 13 (4.3) | 17 (5.6) | 30 (9.9) | 88 (29.0) |
| Control group | |||||
| 8 | 260 (85.8) | 11 (3.6) | 6 (2.0) | 17 (5.6) | 26 (8.6) |
Note:
*
Tooth number 1 stands for all central incisors (11, 21, 31, 41) and so on. For example, Upper right 1 is tooth 11 in the FDI system.