Table 3 Surgical displacements directly after surgery, one year after surgery and the relapse between one week and one year after surgery in the maxilla for both the maxilla-first group and the mandible first group. Translations are given in millimeter, rotations are given in degrees.

From: One-year postoperative skeletal stability of 3D planned bimaxillary osteotomies: maxilla-first versus mandible-first surgery

 

Maxilla first

Mandible first

n

CBCT 1 wk Mean ± SD

CBCT 1 yr Mean ± SD

Relapse Mean ± SD

p-value*

n

CBCT 1 wk Mean ± SD

CBCT 1 yr Mean ± SD

Relapse Mean ± SD

p-value*

p-value**

Translation

X

Left

29

1.7 ± 1.1

1.5 ± 1.3

0.2 ± 1.0

0.36

22

1.2 ± 0.9

1.01 ± 1.0

0.2 ± 0.8

0.36

0.94

Right

24

1.3 ± 1.3

1.1 ± 1.3

0.3 ± 0.9

0.13

31

1.2 ± 1.1

1.07 ± 1.2

0.1 ± 0.7

0.49

0.37

Y

Anterior

49

3.8 ± 2.2

3.6 ± 2.2

0.1 ± 1.3

0.45

48

2.8 ± 1.8

2.55 ± 1.8

0.2 ± 1.3

0.28

0.80

Posterior

4

0.4 ± 0.3

0.2 ± 1.8

0.2 ± 1.7

0.85

5

0.9 ± 0.6

0.66 ± 0.4

0.3 ± 0.7

0.40

0.91

Z

Caudal

29

3.1 ± 2.0

2.6 ± 1.8

0.5 ± 1.1

0.02

29

2.4 ± 2.0

1.45 ± 2.0

1.0 ± 1.6

0.00

0.17

Cranial

24

3.3 ± 2.4

2.8 ± 2.7

0.5 ± 1.2

0.05

24

2.6 ± 2.1

1.66 ± 1.8

0.9 ± 0.9

0.00

0.19

Rotation

Pitch

CCW

25

2.5 ± 2.6

1.9 ± 3.2

0.6 ± 1.2

0.02

33

3.2 ± 2.9

2.05 ± 2.3

1.2 ± 1.2

0.00

0.09

CW

28

3.6 ± 2.7

3.0 ± 2.8

0.6 ± 1.4

0.04

20

3.4 ± 2.1

1.94 ± 1.9

1.4 ± 1.8

0.00

0.08

Roll

CCW

29

1.7 ± 1.8

1.3 ± 1.8

0.4 ± 0.6

0.00

23

1.3 ± 1.1

0.92 ± 1.0

0.4 ± 0.8

0.02

0.83

CW

24

1.2 ± 0.9

0.9 ± 1.1

0.3 ± 1.0

0.14

30

1.1 ± 0.8

0.81 ± 0.9

0.3 ± 0.6

0.01

1.00

Yaw

CCW

24

1.3 ± 1.1

1.0 ± 1.1

0.3 ± 0.4

0.00

29

1.2 ± 1.0

0.94 ± 1.1

0.3 ± 0.7

0.06

0.97

CW

29

1.1 ± 1.0

0.9 ± 1.4

0.2 ± 0.9

0.23

24

1.2 ± 1.2

0.96 ± 1.1

0.3 ± 0.6

0.03

0.76

  1. SD: Standard deviation, CBCT: Cone-Beam Computed Tomography, 1wk: one week, 1 yr: one year, CW: Clockwise, CCW: Counterclockwise. *p-value between surgical displacements 1 week after surgery and 1 year after surgery, **p-value of the differences in relapse between the mandible-first and maxilla-first group.
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