Obstructive Sleep Apnea Syndrome (OSAS) - The most common form of sleep apnea. OSAS occurs when the personís airway collapses or is blocked, which causes shallow breathing (or pauses in breathing) and disrupts sleep.
Occlusal appliances - Devices, such as soft mouth guards or stabilization splints, that are designed to protect the mouth and prevent Sleep-Related Bruxismís negative outcomes.
Opioids - A class of drugs used for pain management, such as codeine, oxycodone, and morphine.
Oral Appliances - Devices used to treat obstructive sleep apnea that move the tongue or lower jaw forward to increase the size of the upper airway, and facilitate breathing.
Oxygen Desaturation Index (ODI) - Used to assess severity of sleep apnea, the index measures the number of times per hour the personís oxygen saturation falls by 3 or 4 percent, or the time spent with saturations below 90 percent.