The ornamental design for a lingualdebondingplierhead, as shown and described.
FIG. 1 is a front view of the lingual debonding plier head;
FIG. 2 is a back perspective view of the lingual debonding plier head of FIG. 1;
FIG. 3 is a plan view of the lingual debonding plier head of FIG. 1; and,
FIG. 4 is a bottom view of the lingual debonding plier head of FIG. 1.
The broken line shown in the figures is included for the purpose of illustrating portions of the lingual debonding plier head and forms no part of the claimed design.