US D577122 S1
The ornamental design for a dental implant, as shown and described.
FIG. 1 is a perspective view of a dental implant showing my new design;
FIG. 2 is an elevation view thereof, the opposite side 180° therefrom being the same;
FIG. 3 is a top plan view thereof; and,
FIG. 4 is a bottom plan view thereof.