Tooth

Root

Author/year

Number of teeth

Number teeth with Isthmus

% Total

%

Central incisor

Uma, et al. [16]

50

5

10%

10%

First Molar

M

Vinegas, et al. [13]

59

13

22%

31%

Von Arx [14]

52

30

58%

Mannocci, et al. [11]

20

10

50%

Peiris, et al. [17]

100

42

42%

Peiris, et al. [18]

177

84

47%

Al-Qudah & Awawdeh [19]

330

43

13%

Manisha & Kiran [9]

40

15

38%

D

Von Arx [14]

28

8

29%

5%

Peiris, et al. [17]

100

5

5%

Peiris, et al. [18]

177

9

5%

Al-Qudah & Awawdeh [19]

330

7

2%

Second Molar

M

Peiris, et al. [17]

100

7

7%

11%

Peiris, et al. [18]

165

27

16%

Al-Qudah [19]

300

29

10%

D

Peiris, et al. [17]

100

0

0%

1%

Peiris, et al. [18]

165

0

0%

Al-Qudah & Awawdeh [19]

300

4

1%