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**120**

**123**

**Chapter 9**

*Morio Tonogi*

also improve sleep quality.

respiratory disturbance

**1. Introduction**

**Abstract**

The Effects of Maxillomandibular

Maxillomandibular advancement (MMA) using a standardized surgical procedure consisting of a LeFort I osteotomy and bilateral sagittal split ramus osteotomy and genioglossus advancement (GA) using a genioplasty improve airway volume, oxygen desaturation, and the AHI in patients with OSA. However, there are few reports on changes in sleep quality following MMA and GA. We assessed the effects of MMA and GA on sleep quality by comparing oxygen desaturation, AHI, and sleep architecture before and after surgery. Methods: Eight patients underwent polysomnography (PSG) and CT scan before and after surgery. Conclusions: Our study finds that %TST and %REM were both increased, while %S1 and NA both decreased. Based on these results, it appears that both the quality and quantity of sleep were improved. MMA and GA improve sleep respiratory disturbance and can

**Keywords:** maxillomandibular advancement, sleep quality, genioplasty,

maxillary retrusion can all cause upper airway obstruction [1–8].

Obstructive sleep apnea (OSA) is a disorder characterized by intermittent and recurrent episodes of partial or complete upper airway obstruction during sleep. Obesity, a narrow nasopharynx and oropharynx, large soft palate, large tonsils, large tongue, tongue retroposition, micrognathia, mandibular retrognathia, and

Maxillomandibular advancement (MMA) and genioglossus advancement (GA)

improve airway volume, oxygen desaturation, and the apnea-hypopnea index (AHI) in patients with OSA. However, there are few reports on changes in sleep quality and architecture following MMA and GA [9]. Therefore, we assessed the

Advancement and Genioglossus

Advancement on Sleep Quality

*Takako Sato, Ryota Nakamura, Akio Himejima,* 

*Hiroaki Azaki, Junya Aoki, Keiichi Yanagawa,* 

*Akemi Kusano, Serim Kang, Saori Ohtani,* 

*Kentarou Yamada, Kanako Yamagata,* 

*Keiji Shinozuka, Takeya Yamada and* 

**Chapter 9**
