title: Second mesiobuccal canals in maxillary molars: their incidence and importance.
mesh_terms: D000328:Adult; D001047:Apicoectomy; D016009:Chi-Square Distribution; D003723:Dental Amalgam; D003786:Dental Pulp Cavity / Q000000981:diagnostic imaging / Q000473:pathology*; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008437:Maxilla; D008963:Molar / Q000000981:diagnostic imaging / Q000473:pathology*; D011859:Radiography; D019233:Retreatment; D012184:Retrograde Obturation; D018915:Root Canal Preparation / Q000295:instrumentation / Q000379:methods; D012390:Root Canal Therapy; D017211:Treatment Failure
chemical_list: D003723:Dental Amalgam