title: Analysis of root canal treated primary incisor after trauma: two year outcomes.
abstract: BACKGROUND
  The low number of clinical studies of traumatized teeth submitted to root canal treatment is completely out of proportion to the seriousness that dental trauma imposes on children in early years.
  
  
  OBJECTIVE
  This study evaluates the outcomes of root canal treatment (RCT) in traumatized primary incisors and identifies the predisposing factors associated with therapy success.
  
  
  METHODS
  This is a retrospective study conducted with all dental records of 704 patients who had one or more teeth with traumatic injuries. Patients with irreversible pulp changes in primary teeth leading to RCT with a 24 month follow-up met the inclusion criteria.
  
  
  RESULTS
  Twenty-five maxillary incisors of 17 children were evaluated. The children's age at the time of therapy ranged from 24 to 72 months (mean 47.3). Pulp necrosis was the most common disorder (84.0%) and pre-operative periapical lesions were observed in 52.0%. Coronal discoloration was found in 48.0%. The roots were filled with ZOE paste (68.0%) or Guedes-Pinto paste (32.0%). Overall RCT success rate was 68.0%. The absence of pre-operative periapical lesions (p = 0.02) and pathological root resorption (p = 0.02) presented positive association with therapy success. Success was not associated to filling paste (p = 0.49), filling extent (p = 0.44), of discoloration (p = 0.39) nor the patients' age (p = 0.59).
  
  
  CONCLUSIONS
  RCT was considered successful in 68.0% of the cases at the 24 month follow-up. Failure of RCT in traumatized primary incisors was associated with pre-operatory periapical lesions and pathological root resorption. The filling paste, the filling extent and the patient's age were unrelated with therapy success.
authors: Department of Pediatric Dentistry and Orthodontics, School of Dentistry, Federal University of Rio de Janeiro (UFRJ), Brazil.
authors: P N
authors: PN
authors: Tannure
authors: T K S
authors: TK
authors: Fidalgo
authors: R
authors: R
authors: Barcelos
authors: L G
authors: LG
authors: Primo
authors: L C
authors: LC
authors: Maia
mesh_terms: D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D003790:Dental Pulp Necrosis / Q000628:therapy; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007180:Incisor / Q000293:injuries*; D008297:Male; D010483:Periapical Diseases / Q000150:complications; D011671:Pulpitis / Q000628:therapy; D012189:Retrospective Studies; D012307:Risk Factors; D012387:Root Canal Filling Materials / Q000627:therapeutic use; D012390:Root Canal Therapy; D012391:Root Resorption / Q000150:complications; D013997:Time Factors; D014084:Tooth Avulsion / Q000150:complications; D019228:Tooth Crown / Q000293:injuries; D014075:Tooth Discoloration / Q000150:complications; D014082:Tooth Fractures / Q000150:complications; D014094:Tooth, Deciduous / Q000293:injuries*; D016896:Treatment Outcome; D015035:Zinc Oxide-Eugenol Cement / Q000627:therapeutic use
chemical_list: D012387:Root Canal Filling Materials; D015035:Zinc Oxide-Eugenol Cement