Devices for treating obstructive sleep apnea include appliances for securing to one or more teeth of a patient and connected to a lingual bridge configured to change shape and apply pressure to a patient's tongue, preventing backward movement of the tongue and blockage of the patient's airway. The lingual bridge is composed of a shape memory alloy to allow the bridge to change shape once deployed in a patient's oral cavity and exposed to increased temperature in the patient's mouth. Pulse generators and electrodes are included to electrically stimulate the nerves and muscles of the tongue to assist in keeping the tongue from moving backward in the mouth during sleep.
