Figure 1

Measurements were taken in the median sagittal plane of teeth with a simple CBCT: distance from the bone crest to the CEJ (BC-CEJ); gingival thickness (GT2, GT4, and GT6) at 2, 4, and 6 mm apical to the CEJ; labial bone thickness (BT2, BT4, and BT6) at 2, 4, and 6 mm apical to the CEJ.