A dental appliance and method of treatment are disclosed. The dental appliance attaches to predetermined teeth of an upper jaw of a patient and includes a constraint mechanism positioned above a patient s tongue wherein the constraint mechanism is shaped to limit movement of a posterior zone of the patient s tongue. The constraint mechanism allows at least an anterior zone and lateral edges of the patient s tongue to perform movements necessary for speech and swallowing. The method of treatment includes use of the dental appliance to reduce the volume of a patient s tongue and enlarge the airways and can be combined with use of another dental appliance to correct another aspect of the patient s tongue.
