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

Table 2.

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

Number of Roots
One Root Two Roots Three Roots Total
Frequency (%) Female 164 (95.3%) 6 (3.5%) 2 (1.2%) 172 (100%)
Male 164 (95.9%) 7 (4.1%) 0 (0%) 171 (100%)
Total 328 (95.6%) 13 (3.8%) 2 (0.6%) 343 (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 155 (90.1%) 6 (3.5%) 0 (0%) 3 (1.7%) 2 (1.2%) 0 (0%) 0 (0%) 6 (3.5%) 172 (100%)
Male 154 (90.1%) 9 (5.3%) 1 (0.6%) 6 (3.5%) 1 (0.6%) 0 (0%) 0 (0%) 0 (0%) 171 (100%)
Total 309 (90.1%) 15 (4.4%) 1 (0.3%) 9 (2.6%) 3 (0.9%) 0 (0%) 0 (0%) 6 (1.7%) 343 (100%)