Table 1 Classification of maxillary and mandibular third molars according to root number and morphology.
No. of roots | Maxillary molars | Mandibular molars | ||||
|---|---|---|---|---|---|---|
No. of teeth and (%) | Root shape and number (%) | No. of teeth and (%) | Root shape and number (%) | |||
1 root | 64 (10.8%) | - Conical | 54, (9.1%) | 16 (2.5%) | - Conical | 4, (0.63%) |
- C-shaped | 10, (1.7%) | - C-shaped | 12, (1.87%) | |||
2roots | 58 (9.8%) | - Separate | 27, (4.6%) | 573 (89.7%) | - Separate | 510, (79.8%) |
- Fused | 31, (5.2%) | - Fused | 63, (9.9%) | |||
3 roots | 414 (69.9%) | - Separate | 243, (41.0%) | 47 (7.4%) | - Separate | 18, (2.81%) |
- B roots fused | 23, (3.9%) | - M & DL fused | 18, (2.81% | |||
- MB & P fused | 23, (3.9%) | - D & DL fused | ||||
- All fused | 125, (21.1%) | - All fused | 2, (0.31%) | |||
9, (1.41%) | ||||||
4 roots | 54 (9.1%) | - All fused | 26, (4.4%) | 3 (0.47%) | – | 3, (0.47%) |
- All separate | 6, (1.0%) | |||||
- MB & MP fused | 10, (1.7%) | |||||
- Palatal roots fused | 1, (0.17%) | |||||
- DB & Ps fused | 1, (0.17%) | |||||
- Bs fused & Ps roots fused | 1, (0.17%) | |||||
- Bs roots fused | Â | |||||
- MB & DB & MP fused | 2, (0.34%) | |||||
| Â | 7, (1.2%) | |||||
5 roots | 2 (0.34%) | – | 2, (0.34%) | – | ||
