Table 1

Number and percentage of roots and canals in 356 mandibular premolars according to location
No. of roots No. of canals
One-rooted Two-rooted 1 2 3 c-shaped
left right left right left right left right left right left right
First premolar 78 96 1 3 68 87 9 11 0 1 1 1
Total 174 (98%) 4 (2%) 155 (87.1%) 20 (11.2%) 1 (0.6%) 2 (1.1%)
Second premolar 79 99 0 0 76 94 3 4 0 0 0 1
Total 178 (100%) 0 (0%) 173 (97.2%) 4 (2.2%) 0 (0%) 1 (0.6%)

Yu et al.

Yu et al. BMC Medical Imaging 2012 12:18   doi:10.1186/1471-2342-12-18

Open Data