The ornamental design for a dentalimpressionuppertray, as shown and described.
FIG. 1 is a top elevational view of a dental impression upper tray showing the design;
FIG. 2 is a bottom elevational view thereof;
FIG. 3 is a side elevational view thereof, the opposite side elevational view being a mirror image thereof;
FIG. 4 is a front elevational view thereof;
FIG. 5 is a rear elevational view thereof;
FIG. 6 is a top perspective view thereof; and,
FIG. 7 is a bottom perspective view thereof.
The ornamental design which is claimed is shown in solid lines in the drawings. The broken lines shown in the figures represent portions of the dental impression upper tray that form no part of the claimed design.