title: Dimensional changes of maxillary sinuses and pharyngeal airway in Class III patients undergoing bimaxillary orthognathic surgery.
abstract: OBJECTIVE
  To evaluate the pharyngeal airway and maxillary sinus volume changes after mandibular setback surgery combined with maxillary advancement and/or impaction surgery.
  
  
  METHODS
  Seventeen Class III skeletal patients (11 females, 6 males) who required bimaxillary orthognathic surgery were selected. Volumetric measurements were performed using cone beam computed tomography (CBCT) scans preoperatively and 3.9 ± 0.87 months postoperatively. All the CBCT scans were assessed and analyzed using MIMICS 14.0 software. Preoperative and postoperative volumes of pharyngeal airway and maxillary sinuses and the relationship between the amounts of surgical movement of the jaws and the above volumes were statistically evaluated.
  
  
  RESULTS
  The pharyngeal airway area presented no significant change except for the lower and total pharyngeal airway volumes in males, in whom a significant decrease was observed (4196.27 ± 2061.11 mm(3) and 3375.53 ± 3624.67 mm(3), respectively). No significant change was observed in the minimal cross-sectional area of the pharyngeal airway. There was a significant decrease in the volume of the maxillary sinuses after the surgery by 3448.09 ± 3315.56 mm(3). No correlation was found between the amount of skeletal movement and the change in the volume of pharyngeal airway or maxillary sinuses.
  
  
  CONCLUSIONS
  There was a significant decrease only for lower and total pharyngeal airway volumes in males and a significant decrease in the volume of the maxillary sinuses.
authors: Department of Orthodontics, School of Dentistry, University of Marmara, Istanbul, Turkey. elenapanou68@hotmail.com
authors: Eleni
authors: E
authors: Panou
authors: Melih
authors: M
authors: Motro
authors: Mustafa
authors: M
authors: Ateş
authors: Ahu
authors: A
authors: Acar
authors: Nejat
authors: N
authors: Erverdi
mesh_terms: D054893:Cone-Beam Computed Tomography; D005260:Female; D006801:Humans; D008297:Male; D008313:Malocclusion, Angle Class III / Q000000981:diagnostic imaging / Q000601:surgery*; D008334:Mandible / Q000000981:diagnostic imaging / Q000601:surgery*; D008437:Maxilla / Q000000981:diagnostic imaging / Q000601:surgery*; D008443:Maxillary Sinus / Q000033:anatomy & histology* / Q000000981:diagnostic imaging; D009929:Organ Size; D057909:Orthognathic Surgery / Q000379:methods*; D010614:Pharynx / Q000033:anatomy & histology* / Q000000981:diagnostic imaging; D010865:Pilot Projects; D018709:Statistics, Nonparametric; D016896:Treatment Outcome; D055815:Young Adult