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Table 5 Comparison of mandibular morphology in males

From: Comparison of mandibular cross-sectional morphology between Class I and Class II subjects with different vertical patterns: based on CBCT images and statistical shape analysis

Index (Mean ± SD (mm))

Mandibular height

Upper third of mandibular width

Lower third of mandibular width

11H

23H

45H

67H

Comparison among regions

11 W-U1/3

23 W-U1/3

45 W-U1/3

67 W-U1/3

Comparison among regions

11 W-L1/3

23 W-L1/3

45 W-L1/3

67 W-L1/3

Comparison among regions

Class I normodivergent

35.19 ± 3.10

34.55 ± 3.10

33.57 ± 2.79

29.85 ± 2.41

11 = 23 = 45, 45 > 67***

8.33 ± 1.49

9.25 ± 1.66

12.13 ± 1.67

15.53 ± 2.00

11 = 23, 23 < 45***, 45 < 67***

14.66 ± 1.92

11.46 ± 1.75

11.55 ± 1.68

13.47 ± 1.92

11 > 23***, 23 = 45, 45 < 67*, 11 = 67

Class I hyperdivergent

36.58 ± 3.25

36.11 ± 3.18

34.84 ± 2.98

29.37 ± 2.60

11 = 23 = 45, 45 > 67***

7.65 ± 1.11

8.48 ± 1.11

11.54 ± 1.52

14.72 ± 1.46

11 = 23, 23 < 45***, 45 < 67***

13.86 ± 1.42

10.54 ± 1.23

10.88 ± 1.41

13.01 ± 1.29

11 > 23***, 23 = 45, 45 < 67*, 11 = 67

Class I hypodivergent

33.28 ± 2.86

32.81 ± 2.44

31.55 ± 2.09

29.62 ± 2.15

11 = 23 = 45, 45 > 67*

8.93 ± 1.33

9.62 ± 1.31

12.32 ± 1.72

15.35 ± 1.95

11 = 23, 23 < 45***, 45 < 67***

14.55 ± 2.11

11.90 ± 1.97

11.08 ± 1.92

12.93 ± 1.57

11 > 23***, 23 = 45 = 67

Class II normodivergent

35.44 ± 2.63

34.89 ± 2.08

33.45 ± 2.04

30.34 ± 2.26

11 = 23 = 45, 45 > 67***

8.41 ± 1.35

9.28 ± 1.53

12.02 ± 1.57

15.36 ± 1.90

11 = 23, 23 < 45***, 45 < 67***

13.61 ± 1.82

11.07 ± 1.65

10.94 ± 1.65

12.54 ± 1.82

11 > 23***, 23 = 45 = 67

Class II hyperdivergent

37.59 ± 2.50

36.39 ± 2.53

34.59 ± 2.19

29.98 ± 1.54

11 = 23 = 45, 45 > 67***

7.55 ± 1.16

8.54 ± 1.61

11.49 ± 1.61

14.86 ± 1.79

11 = 23, 23 < 45***, 45 < 67***

12.57 ± 1.75

10.09 ± 1.94

10.12 ± 2.27

11.98 ± 1.69

11 > 23***, 23 = 45, 45 < 67*, 11 = 67

Class II hypodivergent

34.74 ± 2.52

32.95 ± 3.28

31.88 ± 2.56

30.83 ± 1.57

11 = 23 = 45 = 67

9.51 ± 1.53

9.95 ± 1.50

12.08 ± 1.77

15.92 ± 1.75

11 = 23 = 45, 45 < 67***

14.25 ± 1.64

11.31 ± 1.17

10.23 ± 1.55

13.11 ± 1.35

11 > 23**, 23 = 45, 45 < 67**, 11 = 67

Comparison among different vertical groups

1L < 1A*, 1L < 1H***,

2L < 2H**, 2A < 2H**

1L < 1A*, 1L < 1H***, 1A < 1H*,

2L < 2A*, 2L < 2H***

1L < 1A**, 1L < 1H***,

2L < 2H**

NS

 

1L > 1H**,

2L > 2A*, 2L > 2H***, 2A > 2H*

1L > 1H*,

2L > 2H**

NS

NS

 

2L > 2H**, 2A > 2H*,

1L > 1H**,

2L > 2H*, 2A > 2H*

NS

2L > 2H*

 

Comparison between different sagittal groups

1A = 2A

1L = 2L

1H = 2H

1A = 2A

1L = 2L

1H = 2H

1A = 2A

1L = 2L

1H = 2H

1A = 2A

1L = 2L

1H = 2H

 

1A = 2A

1L = 2L

1H = 2H

1A = 2A

1L = 2L

1H = 2H

1A = 2A

1L = 2L

1H = 2H

1A = 2A

1L = 2L

1H = 2H

 

1A > 2A*

1L = 2L

1H > 2H*

1A = 2A

1L = 2L

1H = 2H

1A = 2A

1L = 2L

1H = 2H

1A > 2A*,

1L = 2L

1H > 2H*

 
  1. 1A: Class I normodivergent group; 1L: Class I hypodivergent group; 1H: Class I hyperdivergent group;
  2. 2A: Class II normodivergent group; 2L: Class II hypodivergent group; 2H: Class II hyperdivergent group
  3. *P < 0.05, **P < 0.01, ***P < 0.001; NS: Not significant