The ornamental design for an extender for dentalapplicatordevice, as shown and described.
FIG. 1 is a perspective view showing the new design for an extender for dental applicator device.
FIG. 2 is a front view thereof;
FIG. 3 is a back view thereof;
FIG. 4 is a left-side view thereof, the right-side view being a mirror image of the left-side view;
FIG. 5 is a plane view thereof; and,
FIG. 6 is a bottom view thereof.
The broken lines shown in the figures are included for the purpose of illustrating portions of the extender for dental applicator device and form no part of the claimed design.