In an embodiment a device adapted to limit relative positioning of a mandible and a maxilla of a user includes a housing and a telescoping member movable within the housing to change a length of the device. An attachment structure extending from the housing pivotably connects the housing to one of the mandible and the maxilla. An attachment structure extending from the telescoping member pivotably connects the telescoping member to the other of the mandible and the maxilla. A stop adjustably positionable in the housing selectively limits movement of the telescoping member within the housing.
