Cephalometric analysis of the difference of the soft palate and pharyngeal morphology between obstructive sleep apnea patients and non-apneic individuals in the Japanese population

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  • SEKI Michio
    Department of Oral and Maxillofacial Radiology, Faculty of Dental Science, Kyushu University Department of Oral and Maxillofacial Surgery, Faculty of Medicine, Oita University
  • NAKAYAMA Eiji
    Department of Oral and Maxillofacial Radiology, Faculty of Dental Science, Kyushu University
  • OKAMURA Kazutoshi
    Department of Oral and Maxillofacial Radiology, Faculty of Dental Science, Kyushu University
  • YAMAMOTO Yoshitake
    Department of Orthodontics, Faculty of Dental Science, Kyushu University
  • YANAGISAWA Shigetaka
    Department of Oral and Maxillofacial Surgery, Faculty of Medicine, Oita University
  • SHIMAHARA Masashi
    Department of Dentistry and Oral Surgery, Osaka Medical College
  • NAKASIMA Akihiko
    Department of Orthodontics, Faculty of Dental Science, Kyushu University
  • YOSHIURA Kazunori
    Department of Oral and Maxillofacial Radiology, Faculty of Dental Science, Kyushu University

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Other Title
  • 日本人における閉塞型睡眠時無呼吸症候群患者と健常者における軟口蓋と咽頭軟組織の形態差についての頭部Ｘ線規格写真による分析
  • ニホンジン ニ オケル ヘイソクガタ スイミンジ ムコキュウ ショウコウグン カンジャ ト ケンジョウシャ ニ オケル ナンコウガイ ト イントウ ナンソシキ ノ ケイタイサ ニ ツイテ ノ トウブ Xセン キカク シャシン ニ ヨル ブンセキ

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Abstract

The purpose of this study was to clarify the differences of soft palate and pharyngeal morphology between patients with obstructive sleep apnea syndrome (OSAS) and non-apneic individuals (control group) in the Japanese population based on cephalometric analysis. All subjects were males under the age of 65 years. The control group was assigned so that the body mass index (BMI) was not significantly different between the control group and the OSAS patients group. The cephalometric radiographs of 40 OSAS patients and 50 non-apneic individuals were traced and digitized using a scanner. Then, the length, thickness, and area of the soft palate, and the length and area of the pharyngeal space in each subject were measured on the digitized images using a computer. The difference of each parameter between the OSAS patient group and the control group was statistically analyzed using the unpaired t test.<BR>As a result, in the OSAS patient group, the length of the soft palate and the length of the pharyngeal space were significantly larger, and the area of the soft palate was significantly wider than those in the control group.<BR>In conclusion, we consider that the soft palate and pharyngeal morphology may be associated with the pathogenesis of OSAS in the Japanese population.

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