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Obstructive sleep apnea patients with the oral appliance experience pharyngeal size and shape changes in three dimensions

Authors
 Seung Hyun Kyung  ;  Young-Chel Park  ;  Eung-Kwon Pae 
Citation
 ANGLE ORTHODONTIST, Vol.75(1) : 15-22, 2005 
Journal Title
ANGLE ORTHODONTIST
ISSN
 0003-3219 
Issue Date
2005
MeSH
Cephalometry ; Cineradiography ; Continuous Positive Airway Pressure ; Female ; Humans ; Male ; Mandibular Advancement/instrumentation* ; Middle Aged ; Occlusal Splints* ; Pharynx/anatomy & histology* ; Pharynx/diagnostic imaging ; Polysomnography ; Sleep Apnea, Obstructive/therapy* ; Tomography, X-Ray Computed/methods
Keywords
OSA ; Cine-CT
Abstract
Pharyngeal size and shape differences between pre- and posttrials of a mandible-protruding oral appliance were investigated using cine computerized tomography (CT). Fourteen patients diagnosed with obstructive sleep apnea whose apnea-hypopnea index was higher than 5 and arousal index higher than 20 underwent a second overnight sleep study to evaluate the effectiveness of the oral appliance. Three-dimensional changes in pharyngeal shape measured on cross-sectional CT images during two respiratory cycles after oral appliance delivery were estimated by three variables: (1) lateral dimension, (2) anterior-posterior dimension, and (3) cross-sectional area at five vertical levels. Apnea indices improved significantly when the appliance was used. During apnea, measurements at retropalatal and retroglossal levels decreased most. However, the cross-sectional area of these levels appeared to increase significantly (P < .05) with the appliance in place during wakefulness. The oral appliance appears to enlarge the pharynx to a greater degree in the lateral than in the sagittal plane at the retropalatal and retroglossal levels of the pharynx, suggesting a mechanism for the effectiveness of oral appliances that protrude the mandible.
Files in This Item:
T200501494.pdf Download
DOI
10.1043/0003-3219(2005)075<0015:OSAPWT>2.0.CO;2
Appears in Collections:
2. College of Dentistry (치과대학) > Dept. of Orthodontics (교정과학교실) > 1. Journal Papers
Yonsei Authors
Park, Young Chel(박영철)
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/151489
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