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Obstructive sleep apnea is the most common sleep-related breathing disorder. People with obstructive sleep apnea repeatedly stop and start breathing while they sleep.There are several types of sleep apnea. Obstructive sleep apnea occurs when the throat muscles relax and block the airway. This happens off and on many times during sleep. A sign of obstructive sleep apnea is snoring.Treatments for obstructive sleep apnea are available. One treatment is a device that uses positive pressure to keep the airway open during sleep. Another option is a mouthpiece to thrust the lower jaw forward during...

The term distalizaiton means, the displacement of a structure to a position farther posterior than that which is accepted at the onset of treatment. Appliance systems that are designed to produce distal movement of first molars and buccal segments have been available from a century. Traditionally extra oral appliances of one type or another have been used for many years. Extraoral traction may be applied to the upper arch in association with fixed or removable appliances, but the objective in all cases is to move the upper molars distally to provide space for alignment of incisors or overjet...