title: Odontogenic maxillary sinusitis with oro-nasal fistula: a case report.
abstract: OBJECTIVE
  The odontogenic sinusitis has an incidence between 38 and 40.6%. Increased risk of maxillary sinusitis has been reported with the presence of periapical abscesses, periodontal disease, dental trauma, tooth extraction and implant placement when the sinusal membrane is perforated.
  
  
  METHODS
  A patient with odontogenic maxillary sinusitis associated with oro-nasal fistula was treated.
  
  
  RESULTS
  The follow-up at six months showed the complete resolution of maxillary sinusitis, palatal fistula got closed and pain symptoms disappeared.
  
  
  CONCLUSIONS
  This case report describes a rare complication of odontogenic maxillary sinusitis: the oro-nasal fistula.
authors: Department of Surgery and Translational Medicine, University of Milano-Bicocca, Monza, Italy.
authors: Fabrizio
authors: F
authors: Carini
authors: Department of Surgery and Translational Medicine, University of Milano-Bicocca, Monza, Italy.
authors: Salvatore
authors: S
authors: Longoni
authors: Department of Surgery and Translational Medicine, University of Milano-Bicocca, Monza, Italy.
authors: Ernesto
authors: E
authors: Amosso
authors: School of Medicine, University of Milan-Bicocca, Monza, Italy.
authors: Stefania
authors: S
authors: Carini
authors: Clinica Otorinolaringoiatrica, Department of Surgery and Translational Medicine, University of Milano-Bicocca, Monza, Italy.
authors: Werner
authors: W
authors: Garavello
authors: Department of Surgery and Translational Medicine, University of Milano-Bicocca, Monza, Italy.
authors: Gianluca
authors: G
authors: Porcaro
keywords: maxillary sinusitis; odontogenic sinusitis; oro-antral fistula; oro-nasal fistula