- 作者：George Umemoto ; Chikara Yoshimura ; Naoko Aoyagi ; Hideo Toyoshima ; Takemasa Matsumoto ; Kentaro Watanabe ; Hideaki Maki ; Toshihiro Kikuta
- 关键词：Obstructive sleep apnea ; Cephalometry ; Two-part semi-rigid oral appliance
- 刊名：Oral Science International
- 出版年：2012
- 出版时间：November, 2012
- 年：2012
- 卷：9
- 期：2
- 页码：49-54
- 全文大小：614 K
Aim
The aim of this study was to assess the effectiveness of the two-part semi-rigid oral appliance, Silensor? (Erkodent, Tuttlingen, Germany) which prevents the mandible from retracting during mouth opening.Materials and methods
Ten patients with mild or moderate obstructive sleep apnea (2 males and 8 females; mean age = 62.5 ¡À 10.0 years) were recruited and lateral cephalometric radiographs were taken. The patients underwent polysomnography before and after 3 months of receiving treatment with the Silensor?. The relationship between the improvement in the polysomnographic variables after the therapy and the cephalometric features was analyzed.
Results
A significant difference was observed in the apnea-hypopnea index after 3 months of Silensor? therapy (1st (baseline), 17.1 ¡À 5.5; 2nd (therapy of Silensor?), 11.0 ¡À 7.2, p = 0.011). Furthermore there was a significant positive correlation between the improvement in the degree of slow wave sleep ( % ) and the mandibular plane angle (R = 0.662, p = 0.037), as well as between the improvement in degree of slow wave sleep ( % ) and the lower face height (R = 0.845, p = 0.002). A significant negative correlation was observed between the improvement in degree of sleep efficiency ( % ) and the soft palate area (R = ?0.809, p = 0.005).
Conclusion
These results suggested that keeping the nasopharyngeal airway space during mouth opening improves apnea-hypopnea index of some patients with mild or moderate obstructive sleep apnea and quality of sleep in obstructive sleep apnea patients with a long lower face height and a small soft palate.