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Posterior Airway Space (posterior + airway_space)

Distribution by Scientific Domains

Medical Sciences	100%

Selected Abstracts

Effects of a mandibular advancement device on the upper airway morphology: a cephalometric analysis

JOURNAL OF ORAL REHABILITATION, Issue 5 2009
M. H. J. DOFF
Summary, The aims of this study were to assess changes in the upper airway morphology associated with an oral appliance in situ in patients suffering from the obstructive sleep apnoea,hypopnoea syndrome and to relate these changes to treatment response. Changes in upper airway morphology as a result of an oral appliance were assessed in 52 patients with obstructive sleep apnoea,hypopnoea syndrome by means of cephalometric analysis. Lateral cephalograms were taken at baseline and after 2,3 months of treatment. Baseline and follow-up cephalograms were traced twice and cephalometric variables were compared. The predictive value of changes in upper airway morphology for the treatment response was evaluated in univariate and multivariate regression analyses. Oral appliance therapy resulted in an increased posterior airway space at the level of the second vertebra, the uvular tip and the base of the tongue. The increase of the posterior airway space at the level of the second vertebra and the uvular tip were the best predictors for relative improvement of the apnoea,hypopnoea index. However, the predictive value for treatment response of these cephalometric upper airway changes should be interpreted with caution. [source]

Obstructive Sleep Apnea Syndrome: A Comparison Between Far-East Asian and White Men

THE LARYNGOSCOPE, Issue 10 2000
Kasey K. Li MD
Abstract Objectives To investigate the possible differences between Far-East Asian men and white men in obstructive sleep apnea syndrome (OSAS). Study Design Prospective nonrandomized controlled study. Methods This study compared consecutive Far-East Asian men with OSAS (n = 50) with two selected groups of White men with OSAS (n = 50 in each group). One group of white men was controlled for age, respiratory disturbance index (RDI), and minimum oxygenation saturation (LSAT). Another group was controlled for age and body mass index (BMI). Cephalometric analysis was performed on all subjects. Results The majority of the Far-East Asian men were found to be nonobese (mean BMI, 26.7 ± 3.8) but had severe OSAS (mean RDI, 55.1 ± 35.1). When controlled for age, RDI, and LSAT, the white men were substantially more obese (mean BMI, 29.7 ± 5.8, P = .0055). When controlled for age and BMI, the white men had less severe illness (RDI, 34.1 ± 17.9, P = .0001). Although the posterior airway space and the distance from the mandibular plane to hyoid bone were less abnormal in the Far-East Asian men, the cranial base dimensions were significantly decreased. Conclusions The majority of the Far-East Asian men in this study were found to be nonobese, despite the presence of severe OSAS. When compared with white men, Far-East Asian men were less obese but had greater severity of OSAS. There may be differences in obesity and craniofacial anatomy as risk factors in these two groups. [source]

Maxillary, mandibular and chin advancement surgery for the treatment of obstructive sleep apnoea

AUSTRALIAN DENTAL JOURNAL, Issue 3 2010
R Jones
Abstract The aim of this retrospective study was to determine the effectiveness of maxillary, mandibular and chin advancement (MMCA) surgery as a treatment for obstructive sleep apnoea and to determine the cephalometric parameters of this surgery. Twenty consecutive adult patients with obstructive sleep apnoea for whom other treatments (constant positive airway pressure, mandibular advancement splint and soft tissue surgery) had failed underwent MMCA surgery. Pre- and post-surgical polysomnography studies measuring the Respiratory Disturbance Index (RDI), minimum blood oxygen saturation (MinSaO2) and Epworth Sleepiness Scale (ESS) were compared. Lateral cephalometric radiographs measuring the pre- and post-surgical posterior airway space (PAS) were also analysed. Regression analysis indicated that the change in PAS at the level of B point largely accounted for the change in the RDI, although it was not significantly related with the postoperative oxygen saturation. MMCA surgery was found to be effective as a treatment for obstructive sleep apnoea, and improved all postoperative measures in this study. There was a significant relationship between B point, the PAS and a reduction in RDI. [source]