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C-shaped root canal system in mandibular premolars according to Fan et al. classifications, and gender
| C-shaped mandibular premolars | Male (%) | Female (%) |
|---|---|---|
| C1 | 6 (4.54%) | 1 (0.75%) |
| C2 | 5 (3.78%) | 9 (6.81%) |
| C3 | 30 (22.72%) | 40 (30.03%) |
| C4a | 15 (11.36%) | 13 (9.84%) |
| C4b | 1 (0.75%) | 3 (2.27%) |
| Out of classification | 6 (4.54%) | 3 (2.27%) |
| Total (%) | 63 (47.72%) | 69 (52.27%) |
