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Table 6 Comparison of RS under different classifications of the third molars in WP groupsa

From: Three-dimensional analysis of the relationship between mandibular retromolar space and positional traits of third molars in non-hyperdivergent adults

Classification criterion

Classification

The RS of Level 1–5(mm)

 

L1

L2

L3

L4

L5

Depth

 

PG-A

12.55 ± 1.86

10.74 ± 1.68

8.51 ± 1.67

6.94 ± 1.72

5.01 ± 1.77

PG-B

10.95 ± 1.87

11.04 ± 1.68

7.87 ± 1.63

6.11 ± 1.92

4.19 ± 2.07

PG-C

9.25 ± 1.83

10.03 ± 1.99

6.86 ± 1.96

6.19 ± 1.79

3.7 ± 1.81

 

P Value

0.000

0.006

0.009

0.000

0.000

Ramus Relationship

 

PG-I

12.51 ± 1.87

10.88 ± 1.91

8.61 ± 1.61

7.26 ± 1.73

5.22 ± 1.87

PG-II

10.83 ± 2.05

10.60 ± 1.70

7.66 ± 1.92

6.32 ± 1.81

4.28 ± 1.75

PG-III

9.44 ± 1.94

10.24 ± 1.78

6.94 ± 1.73

5.56 ± 1.57

3.33 ± 1.80

 

P Value

0.000

0.144

0.000

0.000

0.000

Mesiodistal angle

 

A1

9.38 ± 1.86

9.95 ± 1.68

7.51 ± 2.02

6.52 ± 1.99

4.15 ± 1.98

A2

11.03 ± 1.94

10.6 ± 1.88

7.51 ± 1.76

6.06 ± 1.79

4.09 ± 1.99

A3

12.89 ± 1.57

11.15 ± 1.65

8.49 ± 1.67

6.85 ± 1.65

4.93 ± 1.79

 

P Value

0.000

0.000

0.002

0.037

0.018

Labiolingual angle

 

B1

10.81 ± 2.38

10.68 ± 1.89

8.17 ± 1.71

6.95 ± 1.78

4.51 ± 2.06

B2

11.28 ± 2.39

10.61 ± 1.67

7.79 ± 1.91

6.33 ± 2.00

4.34 ± 2.15

 

B3

11.24 ± 2.11

10.54 ± 1.90

7.52 ± 1.87

6.12 ± 1.60

4.30 ± 1.58

 

P Value

0.406

0.911

0.127

0.051

0.804

  1. aANOVA of RS in each three groups under different classification criteria
  2. The significance level P < 0.05 was labeled bold