 Lateral positions (sleeping on a side), as opposed to supine positions (sleeping on the back), are also recommended as a treatment for sleep apnea, largely because the gravitational component is smaller in the lateral position.Some people benefit from various kinds of oral appliances such as the Mandibular advancement splint to keep the airway open during sleep.Continuous positive airway pressure (CPAP) is the most effective treatment for severe obstructive sleep apnea, but oral appliances are considered a first-line approach equal to CPAP for mild to moderate sleep apnea, according to the AASM parameters of care.