Oral Appliance in Obstructive Sleep Apnea. A Randomized Controlled Blinded Multicenter Study Comparing Two Devices

Inclusion Criteria: * The diagnosis of obstructive sleep apnea with AHI \> 15 * Odontological status that allows retention of oral devices and with at least one molar in each quadrant * Maximal protrusion \>6 mm * Subject giving his/her informed concent * Understands and can communicate in Swedish * Subject understands the instruction on how to put on the polygraphy equipment at home * Valid AHI data at baseline respiratory analysis Exclusion Criteria: * age\< 18 år * BMI \>35 * Jaw complaints requiring treatment the past year * Pain or locking of the jaw at the enrollment visit * At the discretion of the investigator judged not being able to attach to the study directives * Hypersensitive to the material of the devices * Ongoing Continuous Positive Airway Pressure (CPAP) treatment or oral device treatment or such treatment terminated within a month from enrollment