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Table 3 Esthetic grade (mean ± standard deviation) and rank on the canine shape by the orthodontists and laypersons. The P values were based on the chi-square and Fisher’s exact tests between the orthodontists’ and laypersons’ grades

From: Canine edge width and height affect dental esthetics in maxillary canine substitution treatment

Canine shape

Orthodontist

Layperson

 

Edge width (%)

Edge height (mm)

Grade

Rank

Grade

Rank

P values

0

− 0.5

1.67 ± 0.64

27

2.13 ± 1.22

27

0.04

0

0

2.93 ± 0.65

18

2.63 ± 0.87

22

0.59

0

0.5

3.63 ± 0.71

11

3.30 ± 1.16

9

0.02

0

1.0

3.07 ± 0.68

15

3.35 ± 1.05

8

0.55

12.5

− 0.5

2.50 ± 0.60

22

2.35 ± 0.80

26

0.65

12.5

0

3.13 ± 0.58

14

2.70 ± 0.99

20

0.64

12.5

0.5

3.53 ± 0.53

12

3.23 ± 1.07

11

0.42

12.5

1.0

3.40 ± 0.80

13

3.08 ± 1.27

15

0.79

25

−0.5

2.87 ± 0.53

19

2.45 ± 1.08

25

0.06

25

0

3.83 ± 0.60

8

3.45 ± 1.13

5

< 0.01

25

0.5

3.63 ± 0.71

10

2.90 ± 1.17

17

< 0.01

25

1.0

2.53 ± 0.59

21

2.90 ± 1.15

18

< 0.01

37.5

− 0.5

2.97 ± 0.76

17

3.10 ± 1.15

14

0.67

37.5

0

4.23 ± 0.64

5

3.28 ± 1.13

10

< 0.01

37.5

0.5

3.87 ± 0.52

7

2.90 ± 1.08

19

< 0.01

37.5

1.0

2.20 ± 0.49

23

2.68 ± 1.07

21

0.19

50

− 0.5

4.60 ± 0.55

3

3.55 ± 0.99

4

< 0.01

50

0

4.70 ± 0.49

2

3.63 ± 0.87

2

< 0.01

50

0.5

3.03 ± 0.60

16

3.40 ± 0.90

7

0.94

50

1.0

2.00 ± 0.67

25

2.95 ± 1.06

16

< 0.01

62.5

− 0.5

4.80 ± 0.39

1

3.95 ± 0.75

1

< 0.01

62.5

0

4.23 ± 0.58

6

3.57 ± 1.13

3

< 0.01

62.5

0.5

2.70 ± 0.73

20

3.15 ± 1.17

12

0.25

62.5

1.0

1.77 ± 0.42

26

2.45 ± 1.22

24

0.02

75

− 0.5

4.37 ± 0.89

4

3.43 ± 1.13

6

0.16

75

0

3.77 ± 0.82

9

3.13 ± 0.85

13

< 0.01

75

0.5

2.13 ± 0.48

24

2.53 ± 1.15

23

< 0.01

75

1.0

1.00 ± 0.01

28

1.85 ± 1.12

28

0.32