US D277504 S
FIG. 1 is a front elevation of a matrix band retainer showing my new design;
FIG. 2 is a rear elevation thereof;
FIG. 3 is a side elevation as seen from the right;
FIG. 4 is an elevation as seen from the side opposite FIG. 3;
FIG. 5 is a top plan view; and
FIG. 6 is a bottom plan view.