Skip to main content

Table 6 Distribution of right mandibular 1st and 2nd premolars with respect to age

From: Evaluation of root and canal morphology of mandibular premolar amongst Saudi subpopulation using the new system of classification: a CBCT study

Classification

Right 1st PM

Right 2nd PM

AGE

p-value

AGE

p-value

10–20

21–30

31–40

41–50

51–60

60+

 

10–20

21–30

31–40

41–50

51–60

60+

 

1 PM 1

16

67

80

42

33

26

0.001*

24

84

85

39

27

24

0.001*

1 PM 1–2−1

2

5

6

2

0

1

 

0

0

1

1

0

0

 

1 PM 1–2

4

5

4

1

0

2

 

1

1

0

0

0

1

 

1 PM 1–2−1–2

0

0

1

0

0

1

        

2 PM 1 B 1 L 1

1

8

5

5

1

1

 

0

0

1

0

0

0

 

2 PM B 1 L 1

1

2

0

0

0

0

        

3 PMMB 1 DB 1 L 1

       

0

2

1

0

0

0

 

 C-Shaped canals

        

1

1

    

Total

24

87

96

50

34

31

 

25

88

89

40

27

25

 
  1. PM- premolar, *significant value < 0.05; Chi-square test