The ornamental design for a dentalcapsule, as shown and described.
FIG. 1 is a perspective view of a dental capsule, showing my new design.
FIG. 2 is a side view thereof;
FIG. 3 is a bottom view thereof;
FIG. 4 is a top view thereof;
FIG. 5 is a back view thereof wherein the broken lines in the circular detail define the boundary thereof, and the broken lines are for illustrating environment and form no part of the claimed design; and,