The invention is generally a dental appliance that, in exemplary embodiments, includes a mandibular advancement mouthpiece equipped with a tongue-securing mechanism. The dental appliance helps to keep a users airway unobstructed by moving the mandible forward with respect to the maxilla, and securing a tip portion of the tongue slightly anterior to the mandible, so that the tongue is held from falling back into the throat. This invention helps alleviate problems including severe snoring and sleep apnea, which are typically caused by the tongue obstructing the airway at the throat, impeding respiration during sleep or when unconscious. In an exemplary embodiment, the dental appliance comprises of maxillary and mandibular components that make up a mouthpiece, which is configured to circumscribe a tongue retaining mechanism, or tongue sleeve that secures a users tongue in place.
