title: Obturation over an S1 ProTaper instrument fragment in a mandibular molar with three years of follow-up.
abstract: This case report describes root canal filling performed over a large S1 ProTaper file fragment in a second mandibular molar with irreversible pulpitis. An S1 ProTaper file was fractured during the instrumentation of the mesiobuccal canal. Approximately 10 mm of file fragment remained in the apical and middle thirds of the canal. The obturation was performed over this fragment using thermomechanically compacted gutta-percha and sealer. Radiographic findings and the absence of clinical signs and symptoms at 3-year follow up indicated successful treatment. Cone-beam computed tomography images revealed absence of periapical lesion and details of intracanal file fragment related to root fillings and apex morphology. In this case, the presence of a large intracanal fractured instrument did not have a negative impact on the endodontic prognosis during the follow up evaluation period.
authors.affiliation: Department of Dentistry, UNIMONTES - State University of Montes Claros, Montes Claros, MG, Brazil.
authors.forename: Manoel
authors.initials: M
authors.lastname: Brito-Júnior
authors.affiliation: Department of Dentistry, UNIMONTES - State University of Montes Claros, Montes Claros, MG, Brazil.
authors.forename: Yara Teresinha Correa
authors.initials: YT
authors.lastname: Silva-Sousa
authors.affiliation: Department of Dentistry, UNIMONTES - State University of Montes Claros, Montes Claros, MG, Brazil.
authors.forename: João Felipe Bonatto
authors.initials: JF
authors.lastname: Bruniera
authors.affiliation: Department of Dentistry, UNIMONTES - State University of Montes Claros, Montes Claros, MG, Brazil.
authors.forename: Carla Cristina
authors.initials: CC
authors.lastname: Camilo
authors.affiliation: Department of Dentistry, School of Dentistry, UFS - Federal University of Sergipe, Aracaju, SE, Brazil.
authors.forename: André Luis
authors.initials: AL
authors.lastname: Faria-E-Silva
authors.affiliation: Department of Dentistry, UNIMONTES - State University of Montes Claros, Montes Claros, MG, Brazil.
authors.forename: Paulo César
authors.initials: PC
authors.lastname: Saquy
mesh_terms: D054893:Cone-Beam Computed Tomography; D003762:Dental Instruments; D004868:Equipment Failure; D005260:Female; D006171:Gutta-Percha; D006801:Humans; D008334:Mandible; D008875:Middle Aged; D008963:Molar; D011671:Pulpitis / Q000601:surgery*; D012389:Root Canal Obturation / Q000295:instrumentation*
chemical_list: D006171:Gutta-Percha