Nolla Stages

UR

UL

LR

LL

 

 

For age group 16-22 years

 

 

N

Mean
(95%CI)

SD

N

Mean
(95%CI)

SD

N

Mean
(95%CI)

SD

N

Mean
(95%CI)

SD

0

31

19.12
(18.53-19.71)

1.60

22

19.04
(18.35-19.72)

1.55

13

18.69
(17.72-19.66)

1.60

13

18.76
(17.77-19.76)

1.64

1

--

--

--

--

--

--

--

--

--

--

--

--

2

--

--

--

--

--

--

--

--

--

--

--

--

3

1

17.00
(-)

--

2

18.00
(15.29-21.70)

1.41

1

16.00
(-)

--

1

16.00
(-)

--

4

6

18.83
(16.79-20.87)

1.94

4

18.50
(14.71-22.28)

2.38

4

17.75
(14.22-21.27)

2.21

4

17.75
(14.22-21.27)

2.21

5

3

17.00
(17-17)

0.00

4

18.80
(15.45-22.14)

2.10

1

17.00
(16.26-20.39)

--

1

17.00
(-)

--

6

12

17.80
(16.16-19.43)

2.43

11

17.78
(16.15-19.40)

2.41

6

18.33
(17.59-18.79)

1.96

7

18.57
(16.81-20.33)

1.90

7

27

18.29
(17.64-18.94)

1.57

33

18.58
(18.02-19.14)

1.58

38

18.19
(17.56-18.94)

1.83

38

18.24
(17.64-18.85)

1.84

8

13

17.52
(16.69-18.34)

1.36

14

17.27
(16.63-17.91)

1.10

20

18.25
(19.54-20.60)

1.47

19

17.94
(17.30-18.58)

1.32

9

15

20.10
(19.45-20.74)

1.21

16

19.97
(19.32-20.62)

1.21

22

20.07
(19.79-20.35)

1.19

24

19.93
(19.41-20.45)

1.23

10

74

20.01
(19.72-20.30)

1.25

74

20.08
(19.79-20.37)

1.24

75

20.07
(19.48-20.66)

1.22

72

20.16
(19.89-20.44)

1.17

N = Number of third molars, UR-upper right third molar, UL- upper left third molar , LR- lower right third molar, LL- lower left third molar, SD – standard deviation
Table 3B: Number of third molars and mean ages at which each Nolla stage is reached in study groups of 16-22 years.