Table 2 Intra-group comparison of buccal alveolar bone thickness (BABT) measurements before expansion (T0) and after 7-week Alt-RAMEC (T1) with the paired t test (p < 0.05)

1.56 ± 0.09

1.31 ± 0.06

− 0.25 ± 0.14(0.000*)

1.50 ± 0.11

1.36 ± 0.12

− 0.14 ± 0.12(0.000*)

1.56 ± 0.09

1.54 ± 0.09

−0.01 ± 0.02(0.686)

1.56 ± 0.09

1.55 ± 0.09

−0.00 ± 0.02(0.954)

2.56 ± 0.16

2.28 ± 0.16

−0.28 ± 0.04(0.000*)

2.53 ± 0.19

2.14 ± 0.10

−0.34 ± 0.04(0.000*)

2.54 ± 0.19

2.54 ± 0.19

−0.05 ± 0.10(0.896)

2.60 ± 0.19

2.54 ± 0.19

−0.06 ± 0.05(0.731)

1.28 ± 0.06

1.14 ± 0.11

−0.14 ± 0.09(0.000*)

1.29 ± 0.05

1.08 ± 0.10

−0.20 ± 0.09(0.000*)

1.29 ± 0.05

1.08 ± 0.10

−0.21 ± 0.10(0.000*)

1.29 ± 0.05

0.93 ± 0.06

−0.36 ± 0.06(0.000*)

0.81 ± 0.10

0.26 ± 0.05

−0.54 ± 0.11(0.000*)

0.81 ± 0.10

0.25 ± 0.04

−0.56 ± 0.11(0.000*)

0.93 ± 0.06

0.23 ± 0.06

−0.70 ± 0.09(0.000*)

0.83 ± 0.11

0.25 ± 0.05

−0.57 ± 0.11(0.000*)