Use of body plethysmography to measure effect of bimaxillary orthognathic surgery on airway resistance and lung volumes.
Bimaxillary orthognathic surgery can cause changes to respiration and the airways. We used body plethysmography to evaluate its effect on airway resistance and lung volumes in 20 patients with class III malocclusions (8 men and 12 women, aged 17 - 32 years). Lung volumes (forced vital capacity; forced inspiratory volume/one second; forced expiratory volume/one second: forced vital capacity; peak expiratory flow; maximum expiratory flow 25-75; maximum inspiratory flow; total lung capacity; residual volume; residual volume:total lung capacity), and airway resistance were evaluated one week before, and six months after, operation. Bimaxillary operations to correct class III malocclusions significantly increased airway resistance, residual volume, total lung capacity, and residual volume:total lung capacity. Other variables also changed after operation but not significantly so. Orthognathic operations should be done with caution in patients who have pre-existing respiratory diseases.
COPD Research Center, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran. Electronic address: rezaitalabf@mums.ac.ir.
Fariba
F
Rezaeetalab
School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran. Electronic address: Kazemianmz@mums.ac.ir.
Mozhgan
M
Kazemian
School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran. Electronic address: Vaezit@mums.ac.ir.
Touraj
T
Vaezi
School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran. Electronic address: shabanb@mums.ac.ir.
Barratollah
B
Shaban
D000293:Adolescent; D000328:Adult; D000403:Airway Resistance; D005260:Female; D006801:Humans; D008168:Lung; D008297:Male; D008437:Maxilla / Q000601:surgery*; D057909:Orthognathic Surgery; D010993:Plethysmography, Whole Body; D014797:Vital Capacity; D055815:Young Adult
Airway resistance; Bimaxillary orthognathic surgery; Lung volumes; Skeletal class III malocclusion