Sleep Apnea: Oral appliance could help you (and your partner) sleep better -- ScienceDaily
The Department of Orthodontics at Hiroshima University Hospital developed an oral appliance to help patients with mild to moderate sleep apnea. This appliance brings the jawbone forward to enlarge the air passageways at the back of their mouth. Each appliance is custom made for each patient and allows jaw movement, so it doesn't affect patient's teeth or change the shape of their face.
"This is like when you have to use glasses, you have to wear them every time you want to see properly so [patients] have to wear this appliance every time [they] want to sleep better." according to Dr. Ueda.