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Table 6 Comparison of ratio between mandibular height and width in different groups

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

Gender

Ratio

Class I normo-divergent

Class I hyper-divergent

Class I hypo-divergent

Class II normo-divergent

Class II hyper-divergent

Class II hypo-divergent

Comparison

Male

11H/11 W-U1/3

4.37 ± 0.93

4.91 ± 1.01

3.80 ± 0.60

4.32 ± 0.73

5.11 ± 0.96

3.80 ± 0.98

2L < 2H***, 1L < 1H**

11H/11 W-L1/3

2.43 ± 0.31

2.67 ± 0.37

2.33 ± 0.37

2.63 ± 0.27

3.06 ± 0.55

2.49 ± 0.51

2L < 2H**, 1H < 2H**, 2A < 2H**

23H/23 W-U1/3

3.86 ± 0.79

4.35 ± 0.82

3.46 ± 0.45

3.86 ± 0.69

4.42 ± 0.95

3.44 ± 0.90

2L < 2H*, 1L < 1H**

23H/23 W-L1/3

3.08 ± 0.50

3.48 ± 0.59

2.82 ± 0.44

3.21 ± 0.47

3.75 ± 0.84

2.97 ± 0.62

2L < 2H**, 1L < 1H**, 2A < 2H*

45H/45 W-U1/3

2.82 ± 0.46

3.06 ± 0.42

2.60 ± 0.35

2.83 ± 0.43

3.07 ± 0.51

2.71 ± 0.53

1L < 1H*

45H/45 W-L1/3

2.96 ± 0.44

3.27 ± 0.62

2.92 ± 0.46

3.12 ± 0.47

3.62 ± 1.00

3.20 ± 0.63

2A < 2H*

67H/67 W-U1/3

1.95 ± 0.28

2.01 ± 0.27

1.95 ± 0.23

2.00 ± 0.25

2.04 ± 0.26

1.96 ± 0.27

NS

67H/67 W-L1/3

2.25 ± 0.33

2.28 ± 0.34

2.32 ± 0.28

2.46 ± 0.35

2.55 ± 0.38

2.38 ± 0.29

NS

Female

11H/11 W-U1/3

4.08 ± 0.71

4.94 ± 1.01

3.43 ± 0.74

4.29 ± 0.89

5.42 ± 1.11

3.24 ± 0.47

2L < 2A*, 2L < 2H***, 1L < 1A**, 1L < 1H***, 1A < 1H**, 2A < 2H***

11H/11 W-L1/3

2.38 ± 0.33

2.64 ± 0.35

2.16 ± 0.32

2.59 ± 0.43

2.97 ± 0.43

2.15 ± 0.29

2L < 2A*, 2L < 2H***,1L < 1H***, 1H < 2H*, 2A < 2H**

23H/23 W-U1/3

3.83 ± 0.61

4.57 ± 0.93

3.32 ± 0.59

3.79 ± 0.66

4.93 ± 1.07

2.99 ± 4.14

2L < 2H***, 1L < 1H***, 1A < 1H**, 2A < 2H***

23H/23 W-L1/3

3.00 ± 0.41

3.43 ± 0.40

2.75 ± 0.47

3.02 ± 0.38

3.60 ± 0.62

2.61 ± 0.40

2L < 2H***, 1L < 1H***, 1A < 1H*, 2A < 2H**

45H/45 W-U1/3

2.86 ± 0.37

3.20 ± 0.43

2.54 ± 0.36

2.86 ± 0.93

3.23 ± 0.56

2.39 ± 0.32

2L < 2A*, 2L < 2H***, 1L < 1H***, 2A < 2H*

45H/45 W-L1/3

2.88 ± 0.39

3.08 ± 0.45

2.82 ± 0.46

2.93 ± 0.41

3.06 ± 0.42

2.70 ± 0.43

NS

67H/67 W-U1/3

1.82 ± 0.21

1.95 ± 0.23

1.80 ± 0.20

1.88 ± 0.19

1.92 ± 0.36

1.76 ± 0.16

NS

67H/67 W-L1/3

2.13 ± 0.23

2.19 ± 0.28

2.15 ± 0.27

2.21 ± 0.20

2.26 ± 0.28

2.12 ± 0.20

NS

  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