Orthodontic Appliance

FIG. 1 is a perspective view of an orthodontic appliance, showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left-side view thereof;

FIG. 5 is a right-side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is another perspective view thereof in an environment of use.

The broken lines in the FIG. 8 depict environmental subject matter that forms no part of the claimed design.