title: Incidence of oral sinus communications in 389 upper thirmolar extraction.
abstract: BACKGROUND
  The incidence of oral sinus communications (OSC) following the extraction of an upper third molar remains uncertain.
  
  
  OBJECTIVE
  The purpose of this study was to determine the incidence of OSC following the extraction of 389 consecutive upper third molars during 2003 in the Master of Oral Surgery and Orofacial Implantology (Barcelona University, Spain).
  
  
  METHODS
  Different variables were recorded, including patient age, sex, molar angulation, surgical technique and radiological sinus proximity, to determine the relation between third molar extraction and the incidence of OSC.
  
  
  RESULTS
  Only 5.1% (95% CI: 2.2-7.3%) of the upper molar surgical extractions produced OSC, the risk of which was found to be similar in all age groups and increased with the depth of third molar inclusion, the complexity of the surgical technique and the performance of an ostectomy.
authors.affiliation: Facultad de Odontología de la Universidad de Barcelona.
authors.forename: Marta
authors.initials: M
authors.lastname: del Rey-Santamaría
authors.forename: Eduard
authors.initials: E
authors.lastname: Valmaseda Castellón
authors.forename: Leonardo
authors.initials: L
authors.lastname: Berini Aytés
authors.forename: Cosme
authors.initials: C
authors.lastname: Gay Escoda
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D015994:Incidence; D008297:Male; D008964:Molar, Third / Q000601:surgery*; D009957:Oroantral Fistula / Q000453:epidemiology* / Q000209:etiology*; D014081:Tooth Extraction / Q000009:adverse effects*