An oral appliance is a device that a patient will wear for a certain period of time to treat various orofacial disorders. Such appliances are commonly used to treat sleep apnea

Sleep apnea

Sleep apnea is a sleep disorder characterized by abnormal pauses in breathing or instances of abnormally low breathing, during sleep. Each pause in breathing, called an apnea, can last from a few seconds to minutes, and may occur 5 to 30 times or more an hour. Similarly, each abnormally low...

 and TMJ disorders.

MORA

A device used to reposition the lower jaw is known as the MORA (Mandibular Orthopedic Repositioning Appliance) or Gelb Appliance. It uses clear acrylic

Acrylic

Acrylic may refer to:Chemicals and materials:* Chemical compounds that contain the acryl group derived from acrylic acid* Acrylic fiber, a synthetic polymer fiber that contains at least 85% acrylonitrile...

 bite pads that cover the molar

Molar

Molar may refer to:*Molar , the fourth kind of tooth in mammals*Molar , another name for the Spanish wine grape Listan Negro*Molar concentration, a unit of concentration, or molarity, of solutions equal to 1 mole per litre*Molar volume...

s and bicuspids.