Table 3.
Canal configuration frequencies of mandibular first premolars by sex and root canal configurations by unilateral or bilateral status
| Mandibular first premolar | Sex | Bilateral | Unilateral | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Left | Right | Contralateral | Subtotal | |||||||||
| Female | Male | P value | n | P value | n | n | P value | Single | Complicated | C-shaped | n | |
| Single (n = 751) | 419 (84.8) | 332 (72.2) | <.001* | 700 (93.2) | <.001* | 29 (50) | 22 (37.9) | .095 | – | 45 (88.2) | 6 (11.8) | 51 (6.8) |
| Complicated (n = 168) | 65 (13.2) | 103 (22.4) | 116 (69) | 26 (44.8) | 26 (44.8) | 45 (86.5) | – | 7 (13.5) | 52 (31) | |||
| C-shaped (n = 35) | 10 (2) | 25 (5.4) | 22 (62.9) | 3 (5.2) | 10 (17.2) | 6 (46.2) | 7 (53.8) | – | 13 (37.1) | |||
| Total (n = 954) | 494 (51.8) | 460 (48.2) | 838 (87.8) | 58 (6.1) | 58 (6.1) | 51 (6.8) | 52 (31) | 13 (37.1) | 116 (12.2) | |||