title: Open apex type III dens invaginatus: a rare case report of an endodontic retreatment with an anatomical redesign.
abstract: Dens invaginatus is a critical condition for endodontic treatment. It frequently presents a complex internal anatomy and might be associated with incomplete root and apical development. This article presents one of the few reported cases of endodontic retreatment of Type III dens invaginatus. First, the internal anatomy was modified using burs under an operating microscope. Next, conventional chemical and mechanical preparation with hand files and 2.5% sodium hypochlorite was performed. Finally, an intracanal dressing with calcium hydroxide was used for nine months, at which point the anatomical features in the root canal system could be accessed. Adequate periradicular healing was observed and regression of the lesion was noted at the two-year follow-up. This case reinforces the idea that knowledge about the biologic aspects of endodontics, combined with adherence to technical standards, is helpful in resolving complex cases.
authors.affiliation: University of Campinas(UNI-CAMP), Piracicaba, Sao Paolo, Brazil.
authors.forename: Emmanuel Joao Nogueira Leal Da
authors.initials: EJ
authors.lastname: Silva
authors.forename: Alexandre Augusto
authors.initials: AA
authors.lastname: Zaia
mesh_terms: D000293:Adolescent; D056624:Apexification / Q000379:methods; D002126:Calcium Hydroxide / Q000627:therapeutic use; D003719:Dens in Dente / Q000628:therapy*; D003786:Dental Pulp Cavity / Q000002:abnormalities*; D005260:Female; D005500:Follow-Up Studies; D006171:Gutta-Percha / Q000627:therapeutic use; D006801:Humans; D007180:Incisor / Q000002:abnormalities*; D019233:Retreatment; D012387:Root Canal Filling Materials / Q000627:therapeutic use; D012388:Root Canal Irrigants / Q000627:therapeutic use; D012389:Root Canal Obturation / Q000379:methods; D018915:Root Canal Preparation / Q000295:instrumentation / Q000379:methods; D012390:Root Canal Therapy / Q000379:methods*; D012459:Salicylates / Q000627:therapeutic use; D012973:Sodium Hypochlorite / Q000627:therapeutic use; D019227:Tooth Apex / Q000002:abnormalities*
chemical_list: D012387:Root Canal Filling Materials; D012388:Root Canal Irrigants; D012459:Salicylates; C055601:Sealapex; D006171:Gutta-Percha; D012973:Sodium Hypochlorite; D002126:Calcium Hydroxide