FIG. 1 is a top, front, left perspective view of the orthodontic tube according to a first embodiment;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left view thereof;
FIG. 5 is a right view thereof;
FIG. 6 is a top view thereof;
FIG. 7 is a bottom view thereof;
FIG. 8 is a bottom, rear, right perspective view thereof;
FIG. 9 is a top, front, right perspective view of the orthodontic tube according to a second embodiment;
FIG. 10 is a front view thereof;
FIG. 11 is a rear view thereof;
FIG. 12 is a left view thereof;
FIG. 13 is a right view thereof;
FIG. 14 is a top view thereof;
FIG. 15 is a bottom view thereof;
FIG. 16 is a bottom, rear, left perspective view thereof;
FIG. 17 is a top, front, left perspective view of the orthodontic tube according to a third embodiment;
FIG. 18 is a front view thereof;
FIG. 19 is a rear view thereof;
FIG. 20 is a left view thereof;
FIG. 21 is a right view thereof;
FIG. 22 is a top view thereof;
FIG. 23 is a bottom view thereof;
FIG. 24 is a bottom, front, left perspective view thereof;
FIG. 25 is a bottom, rear, right perspective view thereof;
FIG. 26 is a top, front, right perspective view of the orthodontic tube according to a fourth embodiment;
FIG. 27 is a front view thereof;
FIG. 28 is a rear view thereof;
FIG. 29 is a left view thereof;
FIG. 30 is a right view thereof;
FIG. 31 is a top view thereof;
FIG. 32 is a bottom view thereof;
FIG. 33 is a bottom, front, right perspective view thereof;
FIG. 34 is a bottom, rear, left perspective view thereof;
FIG. 35 is a top, front, left perspective view of the orthodontic tube according to a fifth embodiment wherein the oblique lines indicate a white or translucent white ceramic material;
FIG. 36 is a front view thereof;
FIG. 37 is a rear view thereof;
FIG. 38 is a left view thereof;
FIG. 39 is a right view thereof;
FIG. 40 is a top view thereof;
FIG. 41 is a bottom view thereof;
FIG. 42 is a bottom, rear, right perspective view thereof;
FIG. 43 is a top, front, right perspective view of the orthodontic tube according to a sixth embodiment wherein the oblique lines indicate a white or translucent white ceramic material;
FIG. 44 is a front view thereof;
FIG. 45 is a rear view thereof;
FIG. 46 is a left view thereof;
FIG. 47 is a right view thereof;
FIG. 48 is a top view thereof;
FIG. 49 is a bottom view thereof; and,
FIG. 50 is a bottom, rear, left perspective view thereof.
The evenly spaced broken lines and adjacent unshaded surfaces show portions of the orthodontic tube that form no part of the claimed design. The dash-dot-dash broken lines define the boundaries of the claim and form no part of the claimed design.