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Distribution of C-shaped canal configuration in mandibular first premolars according to the unilateral or bilateral presence of distolingual roots in mandibular first molars
| Mandibular first molar | |||||
|---|---|---|---|---|---|
| With DLR | |||||
| Bi-DLR | Uni-DLR | Non-DLR | Total | P value | |
| C-shape canals in PM1 s | |||||
| Yes | 12 (6.5) | 2 (4.4) | 18 (2.7) | 32 (3.5) | .042* |
| No | 172 (93.5) | 43 (95.6) | 655 (97.3) | 870 (92.5) | |
| Total | 184 (100) | 45 (100) | 673 (100) | 902 (100) | |
*The significance level is P = .05
