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. 2018 Nov 3;31(1):137–142. doi: 10.1016/j.sdentj.2018.10.005

Table 1.

The frequency and percentage of the number of roots and canal configuration in mandibular first premolar teeth.

Number of Roots
One Root Two Roots Three Roots Total
Frequency (%) Female 200 (97.5%) 3 (1.5%) 2 (1%) 205 (100%)
Male 177 (95.2%) 9 (4.8%) 0 (0%) 186 (100%)
Total 377 (96.4%) 12 (3.1%) 2 (0.5%) 391 (100%)
Canal Configuration
Type I (1) Type II (2-1) Type III (1-2-1) Type IV (2) Type V (1-2) Type VI (2-1-2) Type VII (1-2-1-2) Type VIII (3) Total
Frequency (%) Female 180 (87.8%) 7 (3.4%) 8 (3.9%) 1 (0.5%) 3 (1.5%) 0 (0%) 0 (0%) 6 (2.9%) 205 (100%)
Male 164 (88.2%) 7 (3.8%) 4 (2.2%) 7 (3.8%) 3 (1.6%) 1 (0.5%) 0 (0%) 0 (0%) 186 (100%)
Total 344 (88%) 14 (3.6%) 12 (3.1%) 8 (2%) 6 (1.5%) 1 (0.3%) 0 (0%) 6 (1.5%) 391 (100%)