title: Transformation of the maxillary bone in adults with nasal polyposis: a CT morphometric study.
abstract: OBJECTIVE
  Nasal polyposis (NP) in adult population is a common problem in otorhinolaryngology outpatient practice. Computed tomography (CT) is the ideal imaging method to investigate paranasal sinus diseases. There is yet no study in the literature measuring the morphometry of maxillary bone in NP. The objectives of this study are to correlate the airway variables obtained by CT findings of both chronic nasal airway obstruction and control group in an adult population, and to investigate whether the bony structure of the airway is affected or not.
  
  
  METHODS
  Forty NP cases that were followed up for 1-5 years by an otorhinolaryngologist were included in this retrospective study. Forty subjects who had normal findings reported on paranasal CT scans were randomly selected from our CT database as the control group. Maxillary and palatine bones (PB) were evaluated: the plane angle between the maxillary alveolar processes (MAP) and PB, and depth of the maxillary arch of both groups were compared.
  
  
  RESULTS
  The mean angle between MAP and PB plane was wider in the NP group (right 128.1 +/- 8.5 degrees and left 126.2 +/- 8.5 degrees ) than control group (right 106.6 +/- 8.1 degrees and left 105.5 +/- 7.3 degrees). The mean depth of maxillary arch was significantly smaller in the NP group (1.2 +/- 0.2 cm) than in the control group (1.4 +/- 0.2 cm).
  
  
  CONCLUSIONS
  There could be a relationship between nasal polyposis in adults and maxillary shape. The flattening and shallowing of the maxillary arch detected in patients with NP may indicate that the bony structural changes continue in adulthood.
authors.affiliation: Department of Radiology, Celal Bayar University, Manisa, Turkey. serterselim@hotmail.com
authors.forename: Selim
authors.initials: S
authors.lastname: Serter
authors.forename: Kivanç
authors.initials: K
authors.lastname: Günhan
authors.forename: Fatma
authors.initials: F
authors.lastname: Can
authors.forename: Yüksel
authors.initials: Y
authors.lastname: Pabuşçu
mesh_terms: D000328:Adult; D000539:Alveolar Process / Q000000981:diagnostic imaging; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008437:Maxilla / Q000000981:diagnostic imaging*; D008875:Middle Aged; D009298:Nasal Polyps / Q000000981:diagnostic imaging*; D021362:Palate, Hard / Q000000981:diagnostic imaging; D012189:Retrospective Studies; D013997:Time Factors; D014057:Tomography, X-Ray Computed / Q000379:methods