An orthodontic appliance (1) that is particularly useful for correcting aclass occlusion is disclosed. The appliance (1)includes a mounting arrangement (3) for mounting over an upper arch of a userhaving a front region and two arm regions extendingrearward from the front region. The mounting arrangement (3) includes an outerwall (7) and an inner wall (9) and a web (11)extending there between. The outer wall (7), the web (11), and the inner wall(9) collectively define an upper channel (21) withinwhich the upper arch and teeth of a user are received to mount the appliance(1). They also define a lower channel (23) for receivingthe lower arch and teeth. The outer wall (7) has an upper portion (17) spacedforward of the upper arch teeth and gums forming anouter spacing formation (4) for holding the buccal mucosa away therefrom. Theappliance (1) also includes a tongue elevator (51)on a lower portion of the inner wall (19) for raising the position of a user'stongue. The appliance is made of a resiliently flexiblematerial that when deformed out of a resting position corresponding to an archform will tend to return to the desired arch form.Further the resilient flexibility assists fitting of the appliance.
