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Table 2 Reference values for dental age estimation among 520 young Ugandans using Demirjian’s classification

From: Accuracy of the lower third molar radiographic imaging to estimate age among Ugandan young people

Demirjian stage

Tooth 48 (n = 510)

Tooth 38 (n = 501)

No.

Median

LQ, UQ

Mean (SD)

No.

Median

LQ, UQ

Mean (SD)

A

2

10

10, 10

10 (0.0)

1

10

10 (0.0)

B

16

10

10, 11.5

10.9 (1.4)

13

10

10, 11.5

10.8 (1.2)

C

83

11

11, 12

11.7 (1.5)

85

11

11, 12

11.7 (1.5)

D

61

12

11, 14

12.6 (1.6)

62

13

11, 14

12.6 (1.5)

E

68

14

13, 15

13.9 (1.5)

62

14

13, 15

13.9 (1.6)

F

59

15

14, 16

15.4 (1.6)

63

15

14, 17

15.4 (1.7)

G

96

18.5

17, 20

18.4 (1.6)

93

19

17, 20

18.5 (1.6)

H

125

21

19, 22

20.1 (1.8)

122

21

19, 22

20.3 (1.7)

  1. LQ and UQ represent lower quartile and upper quartile respectively. A–H are the eight stages of Demirjian’s classification. The difference between the sample number, 520 and number of teeth on each side (Right—510 and left—501) is accounted for by missing teeth or those that had not yet commenced mineralisation