title: Healing complications of traumatized permanent teeth in pediatric patients: a longitudinal study.
abstract: BACKGROUND
  Traumatic dental injuries (TDI) can affect soft and hard dental tissues and supporting structures in different ways and severity.
  
  
  OBJECTIVE
  This study describes the complications associated with health in traumatized permanent teeth (TPT) over a 12-month period and assesses the relationships between TDI, involved tissues, and root development (RD).
  
  
  METHODS
  The study enrolled 294 patients with 548 TPT. Data were collected on the TDI, RD, and the healing complication (HC) and when they were examined (03, 06, and 12 months). Frequencies are described and analyzed using the chi-squared test, relative risk (RR), and Mantel-Haenszel analysis (P≤0.05).
  
  
  RESULTS
  Healing complications were present in 201 (36.68%) teeth and were more frequently diagnosed 3 months (63.68%) after the TDI. Pulp necrosis was the most common HC (38.3%), and it was significantly associated with avulsion (P=0.023). Teeth with complete RD showed a tendency of developing HC over time, independent of TDI (P=0.05). HC in teeth with complete RD related to support tissue trauma (P=0.005) and avulsion (P<0.001) appeared more frequently after 3 months.
  
  
  CONCLUSIONS
  Healing complications are more common in teeth that have suffered trauma in supporting tissues and avulsion, especially in teeth with complete RD. The HC occur more frequently in the first 3 months, and a necrotic pulp was the most common complication.
authors.affiliation: Department of Pediatric Dentistry and Orthodontics, School of Dentistry, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.
authors.forename: Thais R C
authors.initials: TR
authors.lastname: Soares
authors.forename: Ronir R
authors.initials: RR
authors.lastname: Luiz
authors.forename: Patricia A
authors.initials: PA
authors.lastname: Risso
authors.forename: Lucianne C
authors.initials: LC
authors.lastname: Maia
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D008137:Longitudinal Studies; D008297:Male; D018677:Tooth Injuries / Q000503:physiopathology*; D014945:Wound Healing