Patent ID: 8215312

Claim:
A therapeutic mouthpiece comprising: an upper tray adapted to receive a wearer's maxillary teeth; a lower tray adapted to receive said wearer's mandibular teeth; a first upper ridge carried on a maxillary occlusal surface of said upper tray; a second upper ridge carried on said maxillary occlusal surface of said upper tray posterior to and spaced from said first upper ridge; a lower ridge carried on a mandibular occlusal surface of said lower tray received between said first upper ridge and said second upper ridge in an unsecured arrangement so that said lower ridge slides freely forward and back between said first upper ridge and said second upper ridge while continuously in contact with said maxillary occlusal surface of said upper tray; and, whereby said lower tray is movable to a forward position in which said lower ridge slides forward and abuts said first upper ridge to limit forward movement of said lower tray in relation to said upper tray during use without disengaging said lower ridge from said maxillary occlusal surface of said upper tray, and said lower tray is movable to a rearward position in which said lower ridge slides rearward and abuts said second upper ridge to limit rearward movement of said lower tray in relation to said upper tray during use without disengaging said lower ridge from said maxillary occlusal surface of said upper tray.