FIG. 1 is a perspective view of a dental rotary instrument showing our new design;

FIG. 2 is a front view thereof, the rear view being identical to the front view;

FIG. 3 is a right-side view thereof, the left-side view being identical to the right-side view;

FIG. 4 is an enlarged top view thereof;

FIG. 5 is an enlarged bottom view thereof; and,

FIG. 6 is an enlarged cross-sectional view thereof taken along the line 6—6 of FIG. 2.