The ornamental design for a dentalteethdevice, as shown and described.
FIG. 1 is a top view of a dental teeth device of the claimed design;
FIG. 2 is a front view thereof;
FIG. 3 is bottom view thereof;
FIG. 4 is a side view thereof;
FIG. 5 is a side view thereof; and,
FIG. 6 is a rear view thereof.
The ornamental design which is claimed is shown in solid lines in the drawings. The broken line drawings of a dental teeth device are for illustrative purposes only and form no part of the particular claimed design.