FIG. 1 is a bottom, front, left side perspective view of an orthodontic appliance showing our new design;
FIG. 2 is a top, rear, left side perspective view thereof;
FIG. 3 is a left side elevational view thereof;
FIG. 4 is a right side elevational view thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a bottom view thereof;
FIG. 7 is a front elevational view thereof;
FIG. 8 is a rear elevational view thereof;
FIG. 9 is a bottom, front, left side perspective view of an orthodontic appliance illustrating another embodiment of our new design;
FIG. 10 is a top, rear, left side perspective view thereof;
FIG. 11 is a left side elevational view thereof;
FIG. 12 is a right side elevational view thereof;
FIG. 13 is a top plan view thereof;
FIG. 14 is a bottom view thereof;
FIG. 15 is a front elevational view thereof; and,
FIG. 16 is a rear elevational view thereof.
The broken line drawing of an archwire slot liner is for illustrative purposes only and forms no part of the claimed design.