Table 3 Frequency distribution of root canal configurations in mesial root for 733 two-rooted mandibular second molars
Canal configuration N (%) | Gender | Age | Total of all | |||||
|---|---|---|---|---|---|---|---|---|
Female (n = 321) | Male (n = 412) | 15–24 (n = 232) | 25–34 (n = 146) | 35–44 (n = 116) | 45–54 (n = 152) | ≥ 55 (n = 87) | 733 | |
Type I, oval canal | 7 (2.18) | 4 (0.97) | – | – | 2 (1.72) | 8 (5.26) | 1 (1.14) | 11 (1.5) |
Type I, flat canal | 50 (15.5) | 59 (14.3) | 42 (18.1) | 25 (17.1) | 13 (11.2) | 16 (10.5) | 13 (14.9) | 109 (14.8) |
Type I, expand canal | 19 (5.9) | 26 (6.3) | 21 (9.0) | 12 (8.2) | 4 (3.44) | 6 (3.94) | 2 (2.29) | 45 (6.13) |
Type I, Total | 76 (23.6) | 89 (21.6) | 63 (27.1) | 37 (25.3) | 19 (16.3) | 30 (19.7) | 16 (18.3) | 165 (22.5) |
Type II, 2-1 canal | 106 (33.0)* | 106 (25.7)* | 64 (27.5)§ | 48 (32.8)§ | 38 (32.7)§ | 40 (26.3)§ | 22 (25.2)§ | 212 (28.9) |
Type III, 1-2-1 canal | 45 (14.0) | 62 (15.0) | 31 (13.3) | 21 (14.3) | 23 (19.8) | 20 (13.1) | 12 (13.7) | 107 (14.6) |
Type IV, 2-2 canal | 62 (19.3)** | 117 (28.4)** | 53 (22.8)§§ | 28 (19.1)§§ | 30 (25.8)§§ | 41 (26.9)§§ | 27 (31)§§ | 179 (24.4) |
Type V, 1-2 canal | 24 (7.47) | 34 (8.2) | 19 (8.2) | 8 (5.4) | 6 (5.17) | 19 (12.5) | 6 (6.89) | 58 (7.9) |
Type VI, 2-1-2 canal | 4 (1.24) | – | – | 1 (0.68) | – | 1 (0.65) | 2 (2.29) | 4 (0.54) |
Type VII, 1-2-1-2 canal | 2 (0.62) | 4 (0.97) | 1 (0.43) | 2 (1.36) | – | 1 (0.65) | 2 (2.29) | 6 (0.8) |
Type VIII, 3 canal | – | – | – | – | – | – | – | |
Other 1-3-1 canal | 1 (0.31) | – | 1 (0.43) | – | – | – | – | 1 (0.13) |
Other 3-1 canal | 1 (0.31) | – | – | 1 (0.68) | – | – | – | 1 (0.13) |