When deep gingival extension of proximal box is anticipated, which  of the following is used?: (A) Round toothpick wedge, (B) Triangular wedge, (C) Elliot’s separator, (D) Kesling separator
Answer is B. To protect the gingiva and the rubber dam when extending the gingival wall apically, a wooden wedge should already be in place in the gingival embrasure to depress soft tissue and the rubber dam. A round toothpick wedge is preferred unless a deep gingival extension is anticipated. A triangular (i.e., anatomic) wedge is more appropriate for deep gingival extensions because the greatest cross-sectional dimension of the wedge is at its base; as the gingival wall is cut, the bur’s end corner may shave the wedge slightly.