Table 2 Gingival thickness (GT) and bone thickness (BT) at 2, 4, and 6 mm apical to the CEJ by M1.

At 2 mm below the CEJ

GT (mm)

1.27 ± 0.31

1.02 ± 0.29

1.13 ± 0.34

BT (mm)

0.54 ± 0.33

0.44 ± 0.29

0.42 ± 0.38

r

− 0.823**

− 0.747**

− 0.655**

At 4 mm below the CEJ

GT (mm)

1.05 ± 0.20

0.89 ± 0.29

0.85 ± 0.35

BT (mm)

0.93 ± 0.17

0.78 ± 0.27

0.92 ± 0.35

r

− 0.017

− 0.261

− 0.377*

At 6 mm below the CEJ

GT (mm)

1.16 ± 0.37

1.14 ± 0.26

0.92 ± 0.30

BT (mm)

0.77 ± 0.21

0.40 ± 0.35

0.73 ± 0.35

r

0.201

0.101

− 0.061