Abstract
Obstructive sleep apnea （OSA） is a disorder of breathing during sleep that disturbs sleep, resulting in daytime sleepiness and work errors. It is also known as a disease that develops various complications including cardiovascular disease if left untreated for a long period of time. What kind of characters are likely to develop OSA？ Why does moving the jawbone forward improve OSA？ I have done a lot of research on this question: risk of airway reduction due to differences in maxillofacial structure; pattern of airway expansion according to maxillo-mandibular advancement （MMA）; appropriate movement direction and distance of MMA; prediction of hydrodynamic airflow improvement before and after MMA surgery; and improvement of post-treatment sleep quality and changes in airway resistance using the cuff leak test. In this article, I summarize these studies in the hope that it may help researchers involved in sleep medicine in the future.
