Table 2 Bone anchors (n = 12) – cephalometric measurements: angles [°] and distances [mm]. t₀: pretreatment visit; t₁: posttreatment visit, M Mean, SD standard deviation, ^aPaired samples T-test within group between t₀-t₁

SNA

80.13 ± 3.93

82.43 ± 3.93

2.30 ± 1.18

< 0.001

SNB

81.63 ± 4.05

82.34 ± 4.38

0.71 ± 1.28

0.081

ANB

− 1.51 ± 1.40

0.08 ± 1.56

1.58 ± 1.32

0.002

NL-SN

6.58 ± 2.97

7.48 ± 2.37

0.90 ± 2.24

0.192

ML-SN

32.02 ± 4.26

31.01 ± 5.67

–1.01 ± 2.84

0.244

ML-NL

25.46 ± 3.13

23.36 ± 4.83

–2.10 ± 3.73

0.077

MeGoAr

125.08 ± 4.46

125.49 ± 6.36

0.41 ± 4.00

0.73

U1-NL

112.12 ± 6.91

113.81 ± 8.98

1.69 ± 5.62

0.32

L1-ML

85.29 ± 6.85

87.89 ± 7.95

2.03 ± 4.81

0.171

Nasolabial

99.25 ± 15.24

104.17 ± 10.18

4.92 ± 17.59

0.354

OP-ML

16.00 ± 4.00

17.00 ± 4.02

1.00 ± 3.05

0.14

Wits

− 5.43 ± 1.70

–3.43 ± 2.31

2.01 ± 2.65

0.032

ULE

− 4.25 ± 2.67

–4.83 ± 2.95

− 0.58 ± 2.07

0.349

LLE

− 1.75 ± 2.34

–3.17 ± 2.98

–1.42 ± 2.02

0.033