<prompt> When deep gingival extension of proximal box is anticipated, which of the following is used?Round toothpick wedgeTriangular wedgeElliots separatorKesling separator  <response>: 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 burs end corner may shave the wedge slightly. 