title: Failed root canals: the case for apicoectomy (periradicular surgery).
authors.affiliation: Department of Oral Surgery and Stomatology, University of Berne, Switzerland. thomas.vonarx@zmk.unibe.ch
authors.forename: Thomas
authors.initials: T
authors.lastname: von Arx
mesh_terms: D001047:Apicoectomy / Q000295:instrumentation / Q000379:methods; D001861:Bone Regeneration; D000075202:Contraindications; D019232:Dental Restoration Failure; D004724:Endoscopy; D006801:Humans; D008866:Microsurgery / Q000295:instrumentation; D019233:Retreatment; D012184:Retrograde Obturation; D012387:Root Canal Filling Materials; D012390:Root Canal Therapy; D014081:Tooth Extraction; D014092:Tooth Root / Q000601:surgery; D019553:Tooth, Nonvital / Q000628:therapy*
chemical_list: D012387:Root Canal Filling Materials