“…(Figures 9a and 9b) Modifications of their design have been described by several other authors and are thought to yield consistently good results when appropriately selected (2,3,4,9,11,12,13,20,26) . The orthosis consists of a palatal shape which fits into the mouth (similar to an orthodontic retainer), and static acrylic posts which protrude extraorally at the commissures.…”