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Table 2 Comparison of cephalometric changes before (T1) and after treatment (T2)

From: Maxillary protraction using a hybrid hyrax-facemask combination

 

T1

T2

T2-T1

P value

 

Mean

SD

Mean

SD

Mean

SD

 

Angular measurements (deg)

SNA

79.8

4.8

81.8

5.0

2.0

2.0

<0.001a

SNB

80.7

4.2

79.5

4.7

-1.2

2.3

<0.05a

ANB

-0.9

2.3

2.3

3.2

3.2

1.9

<0.001a

ML-NL

27.3

5.3

28.0

7.1

0.7

3.3

0.440a

U1-NL

107.5

10.6

107.3

7.8

-0.2

7.9

0.911a

Linear measurements (mm)

WITS

-4.8

2.1

-0.7

2.2

4.1

2.1

<0.001a

Overbite

0.3

2.6

0.1

1.4

-0.2

2.2

0.783a

Overjet

-0.2

2.2

2.5

1.5

2.7

2.5

<0.001a

U6-A point

24.4

2.6

24.0

2.7

-0.4

1.0

0.134b

  1. aPaired t test; bWilcoxon test.