Table 1.
Distribution of third molar agenesis according to sex, jaw and right-left side. (MZ - monozygotic twins, DZ - dizygotic twins, statistically significant results according to Fisher’s exact test: (p = 0.001)**.
| Variables | Agenesis of third molar | ||||||
|---|---|---|---|---|---|---|---|
| DZ | MZ | All twins | |||||
| Mean (%) | p | Mean (%) | p | Mean (%) | p | ||
| Sex | Males | 5.90 | 0.651 | 7.30 | 0.569 | 7.70 | 0.689 |
| Females | 9.60 | 12.30 | 9.80 | ||||
| Jaw | Maxilla | 9.30 | 0.000** | 12.30 | 0.000** | 10.8 | 0.000** |
| Mandible | 6.20 | 7.30 | 6.70 | ||||
| Laterality | Right | 7.30 | 0.091 | 11.2 | 0.067 | 9.3 | 0.061 |
| Left | 8.20 | 8.4 | 8.2 | ||||