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Table 2 Comparison of differences in the sagittal bone thickness (in mm) between T1 and T0

From: Influence of Invisalign treatment with interproximal enamel reduction (IER) on bone volume for adult crowding: a retrospective three-dimensional cone beam computed tomography study

 

Position

Level

 

n

Min.

Max.

Mean

SD

Wilcoxon test T1–T0

Maxilla

Buccal

Apex

T1–T0

120

−2.36

4,01

0,04

1,04

Z

−0.063 a

 

A. significance (two-sided)

P = 0.950

 

HSPulpa (HEJ)

T1–T0

120

−1.19

1,36

0,02

0,41

Z

−0.965 b

 

A. significance (two-sided)

P = 0.334

 

Oral

Apex

T1–T0

120

−3.87

2,66

−0.17

1,2

Z

−0.980 a

 

A. significance (two-sided)

P = 0.327

 

HSPulpa (HEJ)

T1–T0

120

−1.94

1,34

−0.11

0,58

Z

−2.069 a

 

A. significance (two-sided)

P = 0.039

Mandible

Buccal

Apex

T1–T0

120

−2.59

3,6

−0.42

0,86

Z

−5.853 a

 

A. significance (two-sided)

P <0.001

 

HSPulpa (HEJ)

T1–T0

120

−1.43

0,47

−0.17

0,25

Z

−6.646 a

 

A. significance (two-sided)

P <0.001

 

Oral

Apex

T1–T0

120

−3.56

2,31

0,48

0,84

Z

−6.630 b

 

A. significance (two-sided)

P <0.001

 

HSPulpa (HEJ)

T1–T0

120

−0.81

1,97

0,39

0,46

Z

−7.377 b

 

A. significance (two-sided)

P <0.001

  1. Wilcoxon test* for statistical analysis
  2. * Wilcoxon signed rank test
  3. a Based on positive ranks
  4. b Based on negative ranks