title: Relationship between preoperative cone beam computed tomography and intraoperative findings in sinus augmentation.
abstract: OBJECTIVE
  To investigate whether the presence of bony septum, thickness of sinus membrane (schneiderian membrane), and residual alveolar bone height affects membrane perforation and the duration of sinus augmentation.
  
  
  METHODS
  Preoperative cone beam computed tomography (CBCT) images obtained from patients undergoing lateral sinus augmentation were evaluated for the presence of bony septum, thickness of sinus membrane, and residual alveolar bone height. During the operation, membrane perforation and duration of surgery were noted. The Student t test was used to compare descriptive statistics (mean, standard error) and quantitative variables between groups. The Fisher exact χ(2) test was used to compare the qualitative data, and Pearson correlation test was used to evaluate the correlation between data. P < .05 was considered significant.
  
  
  RESULTS
  Data from 57 patients were evaluated. Membrane perforation occurred in 14 patients included in the study and in 8 patients with sinus septum. A significant relationship was found between the presence of septum and membrane perforation during sinus augmentation (P = .014). However, the relationship among other CBCT and intraoperative findings was not significant.
  
  
  CONCLUSIONS
  Presence of septum in the maxillary sinus increases the risk of membrane perforation, but does not extend the duration of the sinus augmentation.
authors.forename: Gokhan
authors.initials: G
authors.lastname: Gurler
authors.forename: Cagri
authors.initials: C
authors.lastname: Delilbasi
mesh_terms: D000328:Adult; D000368:Aged; D054893:Cone-Beam Computed Tomography; D005260:Female; D006801:Humans; D008297:Male; D008443:Maxillary Sinus / Q000000981:diagnostic imaging* / Q000601:surgery; D008875:Middle Aged; D009297:Nasal Mucosa / Q000000981:diagnostic imaging; D009300:Nasal Septum / Q000000981:diagnostic imaging; D061646:Operative Time; D010256:Paranasal Sinuses / Q000000981:diagnostic imaging; D036301:Qualitative Research; D059546:Sinus Floor Augmentation / Q000379:methods*