| CPC A61F 5/566 (2013.01) | 15 Claims |
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1. A mandibular advancement device comprising:
an upper tray assembly comprising a rigid upper chassis and a maxillary tray; and
a lower tray assembly comprising a rigid lower chassis and a mandibular tray;
wherein the rigid upper and rigid lower chassis define an interlocking arrangement configured to releasably lock the upper and lower tray assemblies into a selected one of a plurality of predefined positions, each of the predefined positions defining a different offset between the upper and lower tray assemblies to enable adjustment of a degree of mandibular advancement relative to a posterior-anterior axis when used; and
wherein the interlocking arrangement includes locking channels and guide members on respective sides of an anterior portion of the mandibular advancement device, the locking channels and guide members each formed by the rigid lower chassis and the rigid upper chassis, respectively, the locking channels each extending along a length parallel to the posterior-anterior axis of the mandibular advancement device, the locking channels each being uniform in cross section normal to the posterior- anterior axis along the length, and the locking channels each including a laterally extending retaining flange, and the guide members of the rigid upper chassis configured to be received in the locking channels and retained by the laterally extending retaining flanges of the rigid lower chassis to prevent separation of the rigid upper and rigid lower chassis in a vertical direction, wherein the locking channels and guide members each extend from a labial edge to a lingual edge of the rigid lower chassis and the rigid upper chassis, respectively, and
wherein the interlocking arrangement further includes a locking member and an at least partly corresponding locking recess or aperture in each posterior end of the mandibular advancement device to prevent relative movement in a transverse direction, wherein the locking members and the at least partly corresponding locking recesses or apertures are entirely posterior to the locking channels and guide members.
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