Table 5 Root canal morphology of mandibular first molars according to gender and tooth side
|  | Mandibular First Molar (n = 370) | |||||||
|---|---|---|---|---|---|---|---|---|
Middle mesial canal | Second distal canal | Two roots | Three roots | |||||
Present | Absent | Present | Absent | Radix entomolaris | Radix paramolaris | Mesial root bifurcation | ||
Left | 2 (1.1%) | 184 (98.9%) | 39 (21.0%) | 147 (79.0%) | 149 (80.1%) | 36 (19.4%) | – | 1 (0.5%) |
Male | 0 (0.0%) | 77 (41.4%) | 19 (10.2%) | 58 (31.2%) | 62 (33.3%) | 14 (7.5%) | – | 1 (0.5%) |
Female | 2 (1.1%) | 107 (57.5%) | 20 (10.8%) | 89 (47.8%) | 87 (46.8%) | 22 (11.8%) | – | – |
Right | 5 (2.7%) | 179 (97.3%) | 33 (17.9%) | 151 (82.1%) | 141 (76.6%) | 43 (23.4%) | – | – |
Male | 1 (0.5%) | 76 (41.3%) | 15 (8.2%) | 62 (33.7%) | 59 (32.1%) | 18 (9.8%) | – | – |
Female | 4 (2.2%) | 103 (56.0%) | 18 (9.8%) | 89 (48.4%) | 82 (44.6%) | 25 (13.6%) | – | – |
Total | 7 (1.9%) | 363 (98.1%) | 72 (19.5%) | 298 (80.5%) | 290 (78.4%) | 79 (21.4%) | – | 1 (0.3%) |