title: Pharyngeal airway space and frontal and sphenoid sinus changes after maxillomandibular advancement with counterclockwise rotation for Class II anterior open bite malocclusions.
abstract: OBJECTIVE
  The purpose of this study was to cephalometrically evaluate the pharyngeal airway space and frontal and sphenoid sinus changes after maxillomandibular advancement counterclockwise rotation for class II anterior open bite malocclusion.
  
  
  METHODS
  The study included 49 patients (98 lateral teleradiographs; 36 females and 13 males) who were analysed in the pre-operative (1 week before surgery) and post-operative (6 months after surgery) periods. In each lateral teleradiography, the dimensions of the inferior and superior pharyngeal airway space, TB-PhW1 [the point between the posterior aspect of the tongue to the dorsal pharyngeal wall (oropharynx) (TB) and the point on the dorsal pharyngeal wall closest to TB (PhW1)] and UP-PhW2 [and the point between the posterior aspect of the soft palate to the dorsal pharyngeal wall (nasopharynx) (UP) (PhW2)] measurements were evaluated, as well as the dimensions of the frontal and sphenoid sinuses. The differences between the two operative times were evaluated by Student's t-test.
  
  
  RESULTS
  All measurements showed excellent reproducibility for the intraclass correlation coefficient (ICC > 0.9; p < 0.0001). There was an increase in the measurements TB-PhW1 and UP-PhW2 and a decrease in the dimensions of the frontal and sphenoid sinuses after orthognathic surgery.
  
  
  CONCLUSIONS
  The morphology of the superior and inferior pharyngeal airway space and frontal and sphenoid sinuses changes after 6 months of maxillomandibular advancement counterclockwise rotation for class II anterior open bite malocclusion.
authors: Department of Morphology, State University of Campinas-UNICAMP, Piracicaba, SP, Brazil. felippeprado@hotmail.com
authors: F B
authors: FB
authors: Prado
authors: A C
authors: AC
authors: Rossi
authors: A R
authors: AR
authors: Freire
authors: F C
authors: FC
authors: Groppo
authors: M
authors: M
authors: De Moraes
authors: P H F
authors: PH
authors: Caria
mesh_terms: D000328:Adult; D002508:Cephalometry; D005260:Female; D005626:Frontal Sinus / Q000033:anatomy & histology*; D006801:Humans; D008297:Male; D019186:Mandibular Advancement; D008437:Maxilla / Q000601:surgery; D015508:Nasal Obstruction / Q000601:surgery; D009666:Nose / Q000033:anatomy & histology; D024343:Open Bite / Q000601:surgery*; D010614:Pharynx / Q000033:anatomy & histology*; D012123:Pulmonary Ventilation; D013101:Sphenoid Sinus / Q000033:anatomy & histology*; D055815:Young Adult