The ornamental design for a dentalscrew, as shown and described.
FIG. 1 is a top perspective view of a dental screw according to the design, shown at an enlarged scale;
FIG. 2 is a perspective view thereof;
FIG. 3 is a side view thereof; the opposite side being a mirror image,
FIG. 4 is a side perspective view thereof;
FIG. 5 is a top view thereof, shown at an enlarged scale; and,
FIG. 6 is a bottom view thereof, shown at an enlarged scale.
The dash-dot-dash broken lines immediately adjacent the shaded areas represent the bounds of the claimed design while the dash-dash-dash broken lines are directed to environment and are for illustrative purposes only; the broken lines form no part of the claimed design.