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Changes of the Pharyngeal Space by Various Oral Appliances for Snoring  

Jo, Chul-Bae (Dept. of Oral Medicine, Dankook University School of Dentistry)
Kim, Mee-Eun (Dept. of Oral Medicine, Dankook University School of Dentistry)
Kim, Ki-Suk (Dept. of Oral Medicine, Dankook University School of Dentistry)
Publication Information
Journal of Oral Medicine and Pain / v.34, no.3, 2009 , pp. 247-256 More about this Journal
Abstract
The purpose of this study was to investigate the changes of the pharyngeal space when the following appliances were inserted: the mandibular advancement appliance (MAA), tongue retaining appliance (TRA), and mandibular advancement-tongue retaining appliance (MATRA). Nine male dental students exhibiting Class I occlusion, normal body mass index (BMI), and no signs and symptoms of snoring were selected for this study. The three kinds of snoring appliances (MAA, TRA and MATRA) were fabricated for each subject. The mandibular advancement of the MAA and MATRA was set at a distance of 5 mm, and the TRA and MATRA were made to hold the tongue in front of the maxillary incisors by 10 to 20 mm. Lateral cephalometric radiographs of the following four states - with no appliance, MAA, TRA, and MATRA - were taken to examine any anatomical changes resulting from the application of the appliances. All four radiographs were traced and analyzed for twenty selected variables related to the pharyngeal space, cranio-cervical posture, and position of the soft palate and hyoid bone. According to the results of this study, there were significant increases in both the upper and lower oropharyngeal spaces when the mandible and tongue were protruded simultaneously, although there was a significant increase only in upper oropharyngeal space when the mandible or tongue was advanced separately. In conclusion, it is suggested that the MATRA may result in more positive effect on the control of snoring and OSA compared to a single use of the MAA or TRA, especially for the patients whose upper airway obstruction occurs in the lower oropharynx.
Keywords
Snoring; Appliance; Tongue retaining; Oropharynx;
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