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Progress in Orthodontics

Table 1 Sample size analysis for 80% power, with 0.05 alpha value

From: Changes in the midpalatal and pterygopalatine sutures induced by micro-implant-supported skeletal expander, analyzed with a novel 3D method based on CBCT imaging

Parameter

Number

Treatment change

n for 80% power

Mean

sd

Rt ANS to maxillary sagittal plane

15

2.59

1.70

6

Lt ANS to maxillary sagittal plane

15

2.16

1.27

5

Rt PNS to maxillary sagittal plane

15

2.34

1.32

5

Lt PNS to maxillary sagittal plane

15

1.99

0.90

4

Width of opening in Rt pterygoid process

15

1.35

1.79

15

Width of opening in Lt pterygoid process

15

2.17

2.45

13

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