Home Subscription Services
 
   

 
The International Journal of Adult Orthodontics & Orthogathic Surgery
AOOS Home Page
About the Editor
Reprints / Articles
Permissions
MEDLINE Search
 
 
 
 
 
FacebookTwitter
Quintessence Publishing: Journals: AOOS

 

The International Journal of Adult Orthodontics & Orthognathic Surgery
(Published from 1986-2002)

Edited by Robert L. Vanarsdall, DDS and Raymond P. White, Jr, DDS, PhD

Continued by World Journal of Orthodontics.

ISSN 0742-1931

Publication:
The International Adult Orthodontics & Orthognathic Surgery
Fall
Volume 17, Issue 3

Back

Cephalometric study of the upper airway in surgically corrected Class III skeletal deformity

Nabil Samman,FRCS, FDSRCS, Shu Sum Tang, BDS,MDS, MFGDP(UK), James Xia, DDS, PhD,

Changes in the upper airway after surgical correction of Class III skeletal dentofacial deformity were investigated by measurement of the cephalometric radiographs of 70 Class III subjects before surgery and 6 months after surgery. Comparison of the results with those of a normal group of 74 subjects without deformity or surgery was also carried out. Gender dimorphism in measurements and type of surgery performed were taken into account. Results showed that postoperatively the soft palate and hyoid bone were posteriorly displaced. In men, the oropharyngeal, hypopharyngeal, and minimal airway depth were reduced, but in women, the minimal depth was not reduced. In the mandibular setback group, men showed posterior movement of the tongue base, with decrease in minimal airway depth. In the maxillary advancement group, nasopharyngeal depth increased in both genders. In the bimaxillary surgery group, the soft palate moved posteriorly and the tongue occupied a larger proportion of the airway in both genders. The hyoid was displaced backwards in women, while men showed a decrease in both oropharyngeal and minimal airway depth. In comparison with normal subjects, postoperative measurements indicated that the soft palate was reduced in length, thickness, and area, and the base of the tongue was more posterior. Minimal pharyngeal depth was reduced in both genders. After mandibular setback, the tongue base was more posterior and the hypopharyngeal depth was reduced. The bimaxillary surgery group also demonstrated a more posterior tongue base but without reduction of the hypopharyngeal depth. The mandibular setback group should be most at risk of obstructive sleep apnea, but compensatory changes in soft palate morphology may explain the low occurrence in practice.

Full Text PDF File | Order Article

  © 2014 Quintessence Publishing Co Inc
 

Home | Subscription Services | Books | Journals | Multimedia | Events | Blog
Terms of Use | Privacy Policy | About Us | Contact Us | Advertising | Help | Sitemap | Catalog