The ornamental design for a orthokey, as shown and described.
FIG. 1 is top perspective view of an orthokey showing my new design;
FIG. 2 is a bottom perspective view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a right view thereof;
FIG. 5 is a rear view thereof;
FIG. 6 is a left view thereof;
FIG. 7 is a top view thereof; and,
FIG. 8 is a bottom view thereof.
My orthodontic aligner removal tool design is characterized by a circular loop, angled neck, multi surface hook end and the written expression “O-KEY.”