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Table 3 Comparison of differences in bone height (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

 

n

Min.

Max.

Mean

SD

Wilcoxon test T1–T0

Maxilla

Buccal

T1–T0

111

−7.85

3,53

−0.24

1,15

Z

−3.058 a

 

A. significance (two-sided)

P <0.01

 

Oral

T1–T0

119

−9.80

3,64

−0.57

1,86

Z

−3.287 a

 

A. significance (two-sided)

P =0.001

Mandible

Buccal

T1–T0

120

−9.99

6,4

−2.42

3,37

Z

−6.864 a

 

A. significance (two-sided)

P <0.001

 

Oral

T1–T0

120

−6.74

4,65

−0.05

1,63

Z

−0.944 b

 

A. significance (two-sided)

P =0.345

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