The ornamental design for a dentalscaler with mirror, as shown and described.
FIG. 1 is an isometric view of a dental scaler with mirror;
FIG. 2 is a front view of the dental scaler of FIG. 1;
FIG. 3 is a rear view of the dental scaler of FIG. 1;
FIG. 4 is a first side view of the dental scaler of FIG. 1;
FIG. 5 is a second side view of the dental scaler of FIG. 1;
FIG. 6 is a top view of the dental scaler of FIG. 1; and,
FIG. 7 is a bottom view of the dental scaler of FIG. 1.
Any surface(s) or portion(s) of the dental scaler with mirror not shown in the figures or otherwise described in the specification form(s) no part of the claimed design.