C-shaped root canals of mandibular second molars in a Korean population: clinical observation and in vitro analysis.
D002965:Classification; D003786:Dental Pulp Cavity / Q000033:anatomy & histology*; D006801:Humans; D007723:Korea; D008334:Mandible; D008963:Molar / Q000033:anatomy & histology*; D014092:Tooth Root / Q000033:anatomy & histology*