Table 1.
Number and percentage of roots and canals in 356 mandibular premolars according to location
|
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%) | 1 (0.6%) | ||||||