Prevalence of middle mesial canal and radix entomolaris of mandibular first permanent molars in a western Chinese population: an in vivo cone-beam computed tomographic study

摘要

Cases of mandibular first molars with RE or MMC in the axial section; the white circles indicate the examined tooth; the white arrows indicate REs; the black arrows indicate MMCs. CBCT images show (A-C) mandibular first molars with RE, (D-E) mandibular first molars with MMC, (F) mandibular first molars with both RE and MMC