The ornamental design for a dental flossdispenser, as shown and described.
FIG. 1 is a front elevational view of the dental floss dispenser showing my new design;
FIG. 2 is a top plan view of the dental floss dispenser;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a bottom plan view thereof;
FIG. 5 is a right side elevational view thereof;
FIG. 6 is a left side elevational view thereof;
FIG. 7 is a left, front perspective view thereof;
FIG. 8 is a left, front exploded perspective view showing the respective components of the dental floss dispenser, a representative spool of dental floss being shown in phantom and not being a part of the design; and,
FIG. 9 is a vertical cross-sectional view of the dental floss dispenser taken through the center of the dental floss dispenser and looking toward the left side of the dental floss dispenser housing, the representative spool of dental floss being shown in phantom and not being a part of the design.