title: Factors associated with complications of removal of third molars: a transversal study.
abstract: OBJECTIVE
  The purpose of this study is to estimate the overall frequency of complications associated with third molars (M3) removal and to identify the risk factors associated with these complications.
  
  
  METHODS
  To the transversal analysis, a researcher confidentially reviewed the records of all M3 surgery patients. The predictor variables were demographic (i.e. age and gender), localization and position of third molar, bone removal and tooth sectioning.
  
  
  RESULTS
  210 patients had one or more third molars teeth removed, a total of 605 teeth. The sample's mean age was 21.6±9.2 years, with 1,4 woman to 1 man. Postoperative complications were recorded in 54 extractions of third molars. The most common complications were infection (42.6%), followed by radicular fractures (11.1%) and gingival alterations (11.1%). Complications were significantly affected by 3 factors: age over 25 years old (p=0.002--OR 2.21), location (p=0.006--OR 2.36), bone removal (p=0.002--OR 3.03) and tooth sectioning (p=0.00002--OR 3.59).
  
  
  CONCLUSIONS
  The results of these analyses suggest that age, location of the tooth, bone removal and tooth sectioning appear to be associated with a higher complication rate for M3 extractions.
authors.affiliation: Universidade Federal do Paraná, 510, Barão de Guaraúna St. Juvevê, Curitiba/PR, Brazil. rebelato@ufpr.br
authors.forename: Nelson-Luis
authors.initials: NL
authors.lastname: Barbosa-Rebellato
authors.forename: Ana-Carolina
authors.initials: AC
authors.lastname: Thomé
authors.forename: Cássia
authors.initials: C
authors.lastname: Costa-Maciel
authors.forename: Jaina
authors.initials: J
authors.lastname: Oliveira
authors.forename: Rafaela
authors.initials: R
authors.lastname: Scariot
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D008964:Molar, Third / Q000601:surgery*; D011183:Postoperative Complications / Q000453:epidemiology / Q000209:etiology; D012307:Risk Factors; D014081:Tooth Extraction / Q000009:adverse effects*; D055815:Young Adult