Fig. 3From: Clinical efficacy of intraoral ultrasonography versus transgingival probing for measurement of gingival thickness in different gingival biotypes: a clinical trialMeasuring the gingival thickness (GT) at 4 mm distance from the free gingival margin. Points A and B indicate the gingival margin, and 4 mm distance from the free gingival margin, respectively. As shown, the GT at point B was 0.8 mmBack to article page