title: Effects of traumatic dental injuries to primary teeth on permanent teeth--a clinical follow-up study.
abstract: OBJECTIVE
  This study evaluated the prevalence of developmental sequelae to permanent teeth (DSP) after traumatic dental injuries to primary teeth (TDI-1) and their association with age, gender, type of injury, recurrence of injury and post-traumatic damage to primary teeth.
  
  
  METHODS
  Dental records of 2725 children treated from February 1993 to December 2008 in a private pediatric dental clinic were examined. A total of 308 records had 412 primary teeth that sustained traumatic injuries. Age at the time of injury ranged from 4 months to 7 years. A chi-squared test and logistic regression were used for statistical analyses.
  
  
  RESULTS
  One hundred forty-eight children (241 teeth) were followed up until the eruption of the permanent successor. The prevalence of DSP was 22.4%. Discoloration and hypoplasia were the most frequent abnormalities (74.1%), followed by eruption disorders (25.9%). Age at the time of TDI-1 was the only variable significantly associated with DSP. Sequelae were most prevalent among children who suffered an injury between 1 and 3 years of age.
  
  
  CONCLUSIONS
  Children who sustain traumatic dental injuries should be followed up regularly for an early diagnosis and treatment of possible DSP.
authors.affiliation: Department of Prevention and Oral Rehabilitation, Faculty of Dentistry, University of Goiás, Goiânia, Go, Brazil. lilianguedes31@terra.com.br
authors.forename: Lilian de Fátima Guedes
authors.initials: Lde F
authors.lastname: de Amorim
authors.forename: Carlos
authors.initials: C
authors.lastname: Estrela
authors.forename: Luciane Ribeiro Resende Sucasas
authors.initials: LR
authors.lastname: da Costa
mesh_terms: D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D003481:Cuspid / Q000293:injuries; D003744:Dental Enamel Hypoplasia / Q000209:etiology; D003786:Dental Pulp Cavity / Q000002:abnormalities; D003790:Dental Pulp Necrosis / Q000209:etiology; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007180:Incisor / Q000293:injuries; D007223:Infant; D008297:Male; D008963:Molar / Q000293:injuries; D010513:Periodontal Ligament / Q000293:injuries; D012008:Recurrence; D012391:Root Resorption / Q000209:etiology; D012737:Sex Factors; D014070:Tooth / Q000254:growth & development*; D014071:Tooth Abnormalities / Q000209:etiology; D020254:Tooth Ankylosis / Q000209:etiology; D014084:Tooth Avulsion / Q000150:complications; D014075:Tooth Discoloration / Q000209:etiology; D014078:Tooth Eruption / Q000502:physiology; D014082:Tooth Fractures / Q000150:complications; D014092:Tooth Root / Q000002:abnormalities; D014094:Tooth, Deciduous / Q000293:injuries*