The ornamental design for a dental implant fixture, as shown and described.
FIG. 1 is a front perspective view showing our new design for a dental implant fixture;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom view thereof;
FIG. 8 is a bottom perspective view thereof;
FIG. 9 is a cross-sectional view taken along line A-A in FIG. 6 thereof; and,
FIG. 10 is a perspective view of FIG. 9 illustrating our new design for a dental implant fixture.
The portions shown in broken lines are solely for the purpose of illustrating context and environmental structures only and form no part of the claimed design.