Abstract: A device for advancing the lower jaw to an upper jaw in a mouth includes an upper member arranged to be retained on the upper jaw of a user in use. A lower member is arranged to be retained on a lower jaw of a user in use and a connection mechanism is configured to connect the upper member to the lower member such that, in use, the lower jaw is advanced to and retained at a minimum distance relative to the upper jaw. The connection mechanism is provided by at least one connecting member, each end of the connecting member being pivotably connected to one of the upper member and lower member. At least one of the pivotable connections is formed by a stud retained on the upper or lower member, the stud having a flange at the end which remains unconnected to the upper or lower member.

Abstract: A device for advancing a lower jaw relative to an upper jaw in a mouth, the device comprising an upper member arranged to be positioned behind the upper front teeth in the upper jaw and configured to extend back towards the upper molars on either side of the upper jaw, the upper member having retaining means for retaining the upper member within the upper jaw by engagement with one or more of the upper molars; a lower member, arranged to be positioned forward of the lower front teeth in the lower jaw and configured to extend backwards to cover at least part of the occlusal surfaces of one or more of the lower molars on either side of the lower jaw, the lower member having retaining means for retaining it within the lower jaw by engagement with one or more of the lower molars; and connection means configured to removably connect the upper member to the lower member such that the lower jaw is advanced to and retained at a predetermined minimum distance relative to the upper jaw.