title: 18-year follow-up of dens invaginatus: retrograde endodontic treatment.
abstract: BACKGROUND
  Dens invaginatus is a rare developmental anomaly that occurs during odontogenesis, with a higher prevalence in the Caucasian race and no significant sex predilection; it can be bilateral. This anomaly occurs in approximately 1.26% of the teeth, and the maxillary lateral incisor is most often affected.
  
  
  METHODS
  This case report describes a female patient with dens invaginatus in the maxillary right conoid lateral incisor. The patient presented to Araçatuba School of Dentistry, Universidade Estadual Paulista, São Paulo, Brazil, in 1995 with an acute periapical abscess in the palatal region of the tooth in question. After access preparation, the pulp in the main root canal was found to be vital and not associated with the abscess; therefore, surgical drainage of the abscess and root canal treatment of the main canal were performed. Surgical complementation was also performed to eliminate the infectious focus, which involved retrograde endodontic treatment of the dens invaginatus being obturated with Sealapex (Sybron Dental Specialties, Glendora, CA) and Ultrafil (Coltène/Whaledent AG, Altstätten, Switzerland). Radiographic assessments were completed periodically to verify healing. After 18 years, the patient returned to Araçatuba School of Dentistry, presenting crown fracture of the tooth in question.
  
  
  RESULTS
  Radiographic examination showed repair and favorable conditions for tooth maintenance, so a post and porcelain core were made.
  
  
  CONCLUSIONS
  The treatment was successful, achieving adequate repair with 18 years of follow-up.
authors.affiliation: Department of Endodontics, Araçatuba School of Dentistry, Universidade Estadual Paulista, São Paulo, Brazil.
authors.forename: Marcelo Tadahiro
authors.initials: MT
authors.lastname: Wayama
authors.affiliation: Department of Endodontics, Araçatuba School of Dentistry, Universidade Estadual Paulista, São Paulo, Brazil.
authors.forename: Diego
authors.initials: D
authors.lastname: Valentim
authors.affiliation: Department of Endodontics, Araçatuba School of Dentistry, Universidade Estadual Paulista, São Paulo, Brazil.
authors.forename: João Eduardo
authors.initials: JE
authors.lastname: Gomes-Filho
authors.affiliation: Department of Endodontics, Araçatuba School of Dentistry, Universidade Estadual Paulista, São Paulo, Brazil.
authors.forename: Luciano Tavares Angelo
authors.initials: LT
authors.lastname: Cintra
authors.affiliation: Department of Endodontics, Araçatuba School of Dentistry, Universidade Estadual Paulista, São Paulo, Brazil. Electronic address: dezan@foa.unesp.br.
authors.forename: Eloi
authors.initials: E
authors.lastname: Dezan
mesh_terms: D002126:Calcium Hydroxide / Q000627:therapeutic use; D003719:Dens in Dente / Q000628:therapy*; D005260:Female; D005500:Follow-Up Studies; D006171:Gutta-Percha / Q000627:therapeutic use; D006801:Humans; D007180:Incisor / Q000002:abnormalities* / Q000293:injuries; D008875:Middle Aged; D010482:Periapical Abscess / Q000628:therapy; D011176:Post and Core Technique; D012184:Retrograde Obturation / Q000379:methods*; D012387:Root Canal Filling Materials / Q000627:therapeutic use; D018915:Root Canal Preparation / Q000379:methods; D012459:Salicylates / Q000627:therapeutic use; D019228:Tooth Crown / Q000293:injuries; D014082:Tooth Fractures / Q000628:therapy
chemical_list: D012387:Root Canal Filling Materials; D012459:Salicylates; C055601:Sealapex; D006171:Gutta-Percha; D002126:Calcium Hydroxide
keywords: Dens in dente; dens invaginatus; follow-up; root canal therapy