Table 2 C-shaped mandibular second premolars according to Fan et al. classification, and canals bifurcation
C-shape classification | Canals bifurcation | ||||
|---|---|---|---|---|---|
Total (%) | Cervical third | Middle third | Apical Third | Without bifurcation | |
Total | 22 (100%) | 3 (13.63%) | 13 (59.09%) | 1 (4.54%) | 5 (22.72%) |
C1 | 3 (13.63) | 0 | 3 (13.63%) | 0 | 0 |
C2 | 4 (18.18) | 1 (4.54%) | 3 (13.63%) | 0 | 0 |
C3 | 3 (13.63) | 1 (4.54%) | 2 (9.09%) | 0 | 0 |
C4a | 6 (27.27) | 0 | 2 (9.09%) | 1 (4.54%) | 3 (13.63%) |
C4b | 2 (9.09) | 0 | 0 | 0 | 2 (9.09%) |
Could not be classified | 4 (18.18) | 1 (4.54%) | 3 (13.63%) | 0 | 0 |