Fig. 4From: Clinical efficacy of intraoral ultrasonography versus transgingival probing for measurement of gingival thickness in different gingival biotypes: a clinical trialMarking a point at 2 mm distance from the free gingival margin at the mid-buccal of right central incisor by a periodontal probe and insertion of an endodontic spreader into the gingival tissue at this point for measurement of gingival thicknessBack to article page