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Table 3 Descriptive statistics of inclination of occlusal plane and other skeletal/dental variables pre- and post- treatment

From: Changes of occlusal plane inclination after orthodontic treatment in different dentoskeletal frames

Measurements

Skeletal class I (n= 30)

Skeletal class II (n= 30)

Skeletal class III (n= 30)

Mean ± SD

Mean ± SD

Mean ± SD

Pre-

Post-

Differences

Pre-

Post-

Differences

Pre-

Post-

Differences

Skeletal frame

         

 SNA°a

81.99 ± 2.85

81.54 ± 3.72

−0.46 ± 1.57

81.33 ± 2.88

81.30 ± 2.85

−0.76 ± 1.15

78.33 ± 3.67

78.74 ± 3.46

0.42 ± 1.21

 SNB°

79.32 ± 2.95

79.36 ± 3.81

0.04 ± 1.35

76.60 ± 3.06

77.16 ± 2.67

0.56 ± 1.40

79.45 ± 3.38

79.66 ± 3.92

0.22 ± 1.38

 ANB°

2.68 ± 0.64

2.18 ± 0.87

−0.49 ± 0.99

5.44 ± 0.88

4.15 ± 1.24

−1.29 ± 1.11

−1.11 ± 0.96

−0.93 ± 1.10

0.18 ± 1.22

 MP-SN°

31.52 ± 4.04

32.09 ± 4.78

0.57 ± 1.55

34.59 ± 4.71

34.75 ± 4.59

0.16 ± 1.88

32.04 ± 6.00

32.07 ± 6.20

0.03 ± 1.48

Occlusal plane

         

 BOP-SN°

14.57 ± 3.82

15.29 ± 4.29

0.72 ± 2.59

17.34 ± 4.43

18.85 ± 4.12

1.51 ± 3.11

14.41 ± 4.29

14.67 ± 4.72

0.26 ± 2.32

 FOP-SN°

14.70 ± 4.10

14.00 ± 4.68

−0.69 ± 3.61

17.36 ± 4.58

17.96 ± 4.44

0.60 ± 2.96

14.65 ± 4.47

14.16 ± 4.78

−0.49 ± 2.98

 MxOP-MnOP°

8.10 ± 2.44

3.50 ± 1.43

−4.60 ± 2.82

8.77 ± 3.30

3.70 ± 1.08

−5.07 ± 3.01

5.69 ± 3.22

3.83 ± 1.38

−1.86 ± 3.29

Dental

         

 Overbite (mm)

3.79 ± 1.31

1.63 ± 0.70

−2.16 ± 1.46

4.30 ± 1.70

1.73 ± 0.63

−2.57 ± 1.51

2.34 ± 1.66

1.67 ± 0.68

−0.67 ± 1.71

 Overjet (mm)

4.01 ± 1.28

2.76 ± 0.58

−1.25 ± 1.30

4.81 ± 1.86

2.63 ± 0.57

−2.18 ± 1.96

2.54 ± 1.37

2.53 ± 0.66

0.24 ± 1.39

Maxillary dentoalveolar

         

 U1-SN°

103.02 ± 6.41

108.36 ± 5.91

5.33 ± 7.72

99.53 ± 6.19

105.68 ± 4.74

6.16 ± 7.88

105.23 ± 5.07

109.73 ± 5.98

4.50 ± 5.65

 U1-PP (mm)

26.29 ± 2.59

26.70 ± 2.58

0.41 ± 1.54

26.66 ± 3.11

27.31 ± 3.40

0.65 ± 1.21

25.49 ± 3.05

26.42 ± 3.42

0.93 ± 1.51

 U6-PP (mm)

19.98 ± 2.22

21.30 ± 2.39

1.32 ± 1.49

19.56 ± 2.64

20.83 ± 2.55

1.28 ± 1.20

20.17 ± 2.55

21.67 ± 2.65

1.50 ± 1.33

Mandibular dentoalveolar

         

 L1-SN°

54.79 ± 6.33

51.20 ± 5.83

−3.60 ± 6.26

49.38 ± 6.96

44.65 ± 5.26

−4.73 ± 4.56

59.94 ± 6.69

59.10 ± 6.62

−0.84 ± 5.09

 L1-MP°

93.68 ± 6.82

96.71 ± 5.31

3.03 ± 6.77

96.04 ± 6.37

100.43 ± 6.06

4.40 ± 4.31

88.02 ± 5.88

88.89 ± 5.79

0.87 ± 5.21

 L1-MP (mm)

37.30 ± 3.08

38.78 ± 3.27

1.48 ± 2.28

38.21 ± 2.79

39.38 ± 3.70

1.16 ± 2.47

36.23 ± 3.13

37.70 ± 3.38

1.47 ± 1.09

 L6-MP (mm)

27.52 ± 2.30

29.91 ± 2.47

2.39 ± 1.81

27.86 ± 2.58

30.69 ± 2.61

2.82 ± 1.75

26.81 ± 2.46

28.79 ± 2.40

1.98 ± 1.01

  1. a “°” represents the unit of angle measurement “degree”.