Table 1 Number and percentage of roots and canals in 356 mandibular premolars according to location
| Â | No. of roots | No. of canals | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
One-rooted | Two-rooted | 1 | 2 | 3 | c-shaped | |||||||
left | right | left | right | left | right | left | right | left | right | left | right | |
First premolar | 78 | 96 | 1 | 3 | 68 | 87 | 9 | 11 | 0 | 1 | 1 | 1 |
Total | 174 (98%) | 4 (2%) | 155 (87.1%) | 20 (11.2%) | 1 (0.6%) | 2 (1.1%) | ||||||
Second premolar | 79 | 99 | 0 | 0 | 76 | 94 | 3 | 4 | 0 | 0 | 0 | 1 |
Total | 178 (100%) | 0 (0%) | 173 (97.2%) | 4 (2.2%) | 0 (0%) | Â | 1 (0.6%) | |||||