Three canals in the mandibular second premolar.
Mortman
R E
RE
Ahn
S
S
D000328:Adult; D001641:Bicuspid / Q000002:abnormalities*; D003786:Dental Pulp Cavity / Q000002:abnormalities*; D006801:Humans; D008297:Male; D008334:Mandible; D008875:Middle Aged; D012390:Root Canal Therapy