Dental appliance

FIG. 1 is a perspective view of a dental appliance showing our new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a side elevation view thereof;

FIG. 5 is a side elevation view of the opposite side of the design as that shown in FIG. 4 ;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines shown in the drawings illustrate portions of a dental appliance that form no part of the claimed design.