title: Characterization of the Maxillary Sinus Using Cone Beam Computed Tomography. A Retrospective Radiographic Study.
abstract: OBJECTIVE
  To analyze the anatomical findings and alterations of the maxillary sinus in asymptomatic patients observed by cone beam computed tomography.
  
  
  METHODS
  A cross-sectional retrospective study of the anatomical variations and alterations of the maxillary sinus was made in 160 patients-71 males (44.3%) and 89 females (55.6%), with an age range of 18 to 74 years-measuring the thickness of the Schneiderian membrane and the cortical thickness of the lower margin of the maxillary sinus (in its most caudal portion), and correlations among the different study variables were assessed.
  
  
  RESULTS
  Sinus pneumatization was the most frequent anatomical finding (81.3%). A negative correlation was observed between the thickness of the Schneiderian membrane and the presence of Underwood septa (P < 0.005). Mucosal thickening of more than 2 mm was directly correlated with the presence of maxillary sinus lesions (opacification, discontinuity of the floor of the sinus, polypoid lesions, or air-liquid levels).
  
  
  CONCLUSIONS
  The presence or absence of septa seems to be related to the thickness of the Schneiderian membrane.
authors.affiliation: *Associate Professor, Periodontics Unit, Faculty of Medicine and Dentistry, University of Murcia, Murcia, Spain. †Private Practice, Murcia, Spain. ‡Full Professor, Oral Medicine Unit, Faculty of Medicine and Dentistry, University of Murcia, Murcia, Spain. §Private Practice, Murcia, Spain.
authors.forename: Arturo
authors.initials: A
authors.lastname: Sánchez-Pérez
authors.forename: Alexandra Carla
authors.initials: AC
authors.lastname: Boracchia
authors.forename: Pía
authors.initials: P
authors.lastname: López-Jornet
authors.forename: Paula
authors.initials: P
authors.lastname: Boix-García
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D054893:Cone-Beam Computed Tomography / Q000379:methods*; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D008297:Male; D008443:Maxillary Sinus / Q000033:anatomy & histology / Q000000981:diagnostic imaging*; D008875:Middle Aged; D009297:Nasal Mucosa / Q000033:anatomy & histology / Q000000981:diagnostic imaging; D011862:Radiography, Panoramic; D012189:Retrospective Studies; D055815:Young Adult