The ornamental design for an k-tec implant design, as shown and described.
FIG. 1 is a front perspective view of an k-tec implant design;
FIG. 2 is a bottom perspective view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a back view thereof;
FIG. 5 is a side view thereof;
FIG. 6 is a bottom view thereof; and,
FIG. 7 is a top view thereof.
The broken lines in the drawings are provided for environment and depict unclaimed portions of the single piece implant for the dental implant, and form no part of the claimed design.