title: Treatment considerations of the middle mesial canal of mandibular first and second molars.
mesh_terms: D000293:Adolescent; D000328:Adult; D003786:Dental Pulp Cavity / Q000002:abnormalities*; D006801:Humans; D008437:Maxilla; D008875:Middle Aged; D008963:Molar / Q000002:abnormalities*; D012390:Root Canal Therapy / Q000379:methods*