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Table 2 Descriptive statistics for variables in each age group

From: The relation between incisal guidance angle and the growth and development of temporomandibular joint: a multi-cross-sectional retrospective study

 

1

2

3

6–12

13–16

17–25

26–33

6–12

13–16

17–25

26–33

6–12

13–16

17–25

26–33

Incisal guidance angle(IGA)

37.47 ± 6.73

34.47 ± 6.34

35.81 ± 7.00

37.34 ± 6.09

50.62 ± 3.90

49.66 ± 3.14

51.06 ± 4.62

48.16 ± 3.17

69.11 ± 6.95

68.15 ± 5.37

69.31 ± 7.84

72.07 ± 7.10

Occlusal plane angle (OPA)

6.96 ± 4.50

3.70 ± 5.27

2.93 ± 4.47

2.88 ± 3.56

12.68 ± 4.56

8.10 ± 3.01

7.81 ± 3.21

5.60 ± 2.73

11.01 ± 4.02

8.06 ± 4.84

4.63 ± 4.58

5.78 ± 4.02

Medial space (MS)

2.47 ± 0.67

2.30 ± 0.60

2.70 ± 1.20

2.56 ± 0.62

1.83 ± 0.60

1.95 ± 0.60

2.22 ± 0.69

2.46 ± 0.71

2.09 ± 0.53

2.21 ± 0.68

2.32 ± 0.61

2.29 ± 0.62

Lateral space (LS)

2.17 ± 0.43

1.95 ± 0.40

1.92 ± 0.60

2.16 ± 0.61

1.87 ± 0.59

1.56 ± 0.44

2.04 ± 0.66

1.88 ± 0.50

1.91 ± 0.50

1.92 ± 0.44

1.96 ± 0.43

1.93 ± 0.52

Medial inclination of the condyle (MIC)

14.83 ± 3.29

14.96 ± 3.42

16.48 ± 6.35

17.05 ± 3.77

15.97 ± 4.86

17.67 ± 2.92

16.10 ± 3.58

15.30 ± 4.01

14.26 ± 2.67

15.59 ± 4.07

15.12 ± 4.61

14.79 ± 4.14

Lateral inclination of the condyle (LIC)

18.94 ± 4.86

18.12 ± 4.29

18.62 ± 4.89

19.01 ± 4.42

16.80 ± 4.28

18.13 ± 3.05

17.78 ± 4.83

18.96 ± 5.15

16.09 ± 5.20

18.32 ± 3.89

14.84 ± 4.11

17.72 ± 5.05

Superior space (SS)

2.83 ± 0.65

2.80 ± 0.46

2.87 ± 0.80

3.16 ± 0.63

2.59 ± 0.65

2.38 ± 0.60

2.95 ± 0.75

2.94 ± 0.59

2.48 ± 0.40

2.76 ± 0.42

2.91 ± 0.62

2.97 ± 0.65

Anterior space (AS)

1.84 ± 0.43

1.65 ± 0.41

1.88 ± 0.56

1.95 ± 0.55

1.51 ± 0.48

1.61 ± 0.47

1.81 ± 0.39

1.81 ± 0.55

1.47 ± 0.39

1.83 ± 0.65

1.95 ± 0.79

2.02 ± 0.76

Posterior space (PS)

2.05 ± 0.54

1.70 ± 0.44

1.74 ± 0.52

1.81 ± 0.47

1.73 ± 0.60

1.36 ± 0.26

1.64 ± 0.42

1.64 ± 0.34

1.69 ± 0.40

1.73 ± 0.38

1.66 ± 0.41

1.73 ± 0.44

Anterior inclination of the condyle (AIC)

25.17 ± 6.71

28.41 ± 6.51

29.39 ± 6.15

31.12 ± 5.09

23.58 ± 5.07

28.04 ± 5.34

29.26 ± 4.08

29.13 ± 4.04

25.78 ± 4.80

28.62 ± 6.17

30.81 ± 6.41

32.68 ± 5.50

Posterior inclination of the condyle(PIC)

25.64 ± 7.02

24.00 ± 4.57

25.59 ± 5.35

25.91 ± 4.94

25.17 ± 5.50

26.47 ± 3.11

25.52 ± 4.15

28.10 ± 4.43

25.18 ± 4.78

25.85 ± 4.59

25.14 ± 4.15

25.86 ± 4.87

Height of the fossa (HF)

6.40 ± 0.91

6.64 ± 1.36

6.10 ± 1.12

6.17 ± 0.80

5.83 ± 0.84

6.60 ± 0.67

6.96 ± 0.96

6.33 ± 0.82

6.21 ± 1.02

6.74 ± 0.97

6.63 ± 1.00

6.54 ± 0.77

Width of the fossa (WF)

16.57 ± 1.46

16.76 ± 1.85

16.88 ± 1.97

16.69 ± 1.15

16.51 ± 1.40

17.19 ± 1.46

16.94 ± 1.49

16.25 ± 1.46

16.49 ± 1.98

17.46 ± 1.51

17.04 ± 1.49

16.72 ± 1.64

Articular eminence inclination (AEI)

35.01 ± 5.58

32.57 ± 5.16

31.64 ± 6.70

31.70 ± 4.68

31.35 ± 4.09

33.85 ± 4.55

35.94 ± 7.14

33.14 ± 4.89

32.74 ± 5.16

33.46 ± 5.48

34.74 ± 6.70

35.48 ± 4.78

Long axis of the condyle (LAC)

16.43 ± 1.46

17.97 ± 2.17

18.33 ± 2.30

18.88 ± 1.63

16.34 ± 2.46

18.56 ± 1.81

19.78 ± 1.94

19.32 ± 1.93

16.91 ± 1.92

18.18 ± 1.70

19.56 ± 2.78

19.23 ± 1.91

Minor axis of the condyle (MAC)

8.35 ± 0.77

8.83 ± 0.87

9.15 ± 0.76

9.32 ± 0.84

9.45 ± 1.12

9.02 ± 0.63

9.45 ± 0.63

9.18 ± 0.76

8.64 ± 0.81

8.83 ± 0.87

8.96 ± 0.79

9.06 ± 0.87

  1. 1: IGA < 45°; 2: 45° ≤ IGA ≤ 60°; 3: IGA > 60°