Table 1 Descriptive statistics and 95% CIs for the beauty scores of each of the 27 perceptometric images according to laypersons, dentists, and orthodontists. In each image, the first number shows the extent of gingival display and the second number shows the buccal corridor width. Note: The perceptometric images are sorted in this table after data collection (for a better visualization); during the survey, the perceptometric images were randomized

Long 2mm 25%

Female

26

1.19

0.40

1.03

1.35

1

2

24

1.04

0.20

0.96

1.13

1

2

14

1.14

0.36

0.93

1.35

1

2

Male

10

2.50

1.65

1.32

3.68

1

5

12

1.17

0.58

0.80

1.53

1

3

22

1.45

0.67

1.16

1.75

1

3

Both

36

1.56

1.08

1.19

1.92

1

5

36

1.08

0.37

0.96

1.21

1

3

36

1.33

0.59

1.14

1.53

1

3

Short 2mm 25%

Female

26

1.35

0.56

1.12

1.57

1

3

24

1.04

0.20

0.96

1.13

1

2

14

1.29

0.61

0.93

1.64

1

3

Male

10

2.10

1.10

1.31

2.89

1

4

12

1.17

0.58

0.80

1.53

1

3

22

1.73

0.70

1.42

2.04

1

3

Both

36

1.56

0.81

1.28

1.83

1

4

36

1.08

0.37

0.96

1.21

1

3

36

1.56

0.69

1.32

1.79

1

3

Short 2mm 20%

Female

26

1.35

0.69

1.07

1.62

1

3

24

1.21

0.51

0.99

1.42

1

3

14

1.64

1.08

1.02

2.27

1

4

Male

10

2.10

0.88

1.47

2.73

1

3

12

1.25

0.62

0.86

1.64

1

3

22

1.82

0.85

1.44

2.20

1

3

Both

36

1.56

0.81

1.28

1.83

1

3

36

1.22

0.54

1.04

1.41

1

3

36

1.75

0.94

1.43

2.07

1

4

Long 2mm 20%

Female

26

1.54

0.86

1.19

1.89

1

4

24

1.33

0.64

1.06

1.60

1

3

14

1.43

0.85

0.94

1.92

1

4

Male

10

2.30

1.42

1.29

3.31

1

5

12

1.75

0.87

1.20

2.30

1

4

22

1.91

0.75

1.58

2.24

1

4

Both

36

1.75

1.08

1.38

2.12

1

5

36

1.47

0.74

1.22

1.72

1

4

36

1.72

0.81

1.45

2.00

1

4

Normal 2mm 25%

Female

26

1.62

0.85

1.27

1.96

1

4

24

1.58

1.10

1.12

2.05

1

4

14

1.36

0.74

0.93

1.79

1

3

Male

10

2.50

0.97

1.80

3.20

1

4

12

1.67

0.98

1.04

2.29

1

4

22

1.73

0.88

1.34

2.12

1

4

Both

36

1.86

0.96

1.54

2.19

1

4

36

1.61

1.05

1.26

1.97

1

4

36

1.58

0.84

1.30

1.87

1

4

Short 6mm 15%

Female

26

1.62

0.70

1.33

1.90

1

3

24

1.54

0.59

1.29

1.79

1

3

14

1.79

1.05

1.18

2.39

1

4

Male

10

2.40

1.07

1.63

3.17

1

4

12

1.67

0.78

1.17

2.16

1

3

22

1.59

0.67

1.30

1.89

1

3

Both

36

1.83

0.88

1.54

2.13

1

4

36

1.58

0.65

1.36

1.80

1

3

36

1.67

0.83

1.39

1.95

1

4

Long 2mm 15%

Female

26

1.85

0.97

1.46

2.24

1

4

24

1.46

0.72

1.15

1.76

1

3

14

2.29

0.99

1.71

2.86

1

4

Male

10

2.70

0.95

2.02

3.38

1

4

12

1.67

0.65

1.25

2.08

1

3

22

2.36

0.79

2.01

2.71

1

4

Both

36

2.08

1.02

1.74

2.43

1

4

36

1.53

0.70

1.29

1.76

1

3

36

2.33

0.86

2.04

2.62

1

4

Short 2mm 2%

Female

26

1.77

0.95

1.39

2.15

1

4

24

1.75

1.11

1.28

2.22

1

5

14

2.07

1.14

1.41

2.73

1

5

Male

10

2.70

1.34

1.74

3.66

1

5

12

2.50

0.80

1.99

3.01

1

4

22

1.91

1.02

1.46

2.36

1

4

Both

36

2.03

1.13

1.64

2.41

1

5

36

2.00

1.07

1.64

2.36

1

5

36

1.97

1.06

1.62

2.33

1

5

Normal 2mm 20%

Female

26

2.27

1.08

1.83

2.71

1

5

24

1.63

0.97

1.22

2.03

1

4

14

2.07

1.00

1.50

2.65

1

4

Male

10

2.40

0.84

1.80

3.00

1

4

12

1.75

0.97

1.14

2.36

1

4

22

2.14

0.89

1.74

2.53

1

4

Both

36

2.31

1.01

1.96

2.65

1

5

36

1.67

0.96

1.34

1.99

1

4

36

2.11

0.92

1.80

2.42

1

4

Long 6mm 15%

Female

26

2.31

1.19

1.83

2.79

1

5

24

1.88

0.68

1.59

2.16

1

3

14

1.93

1.07

1.31

2.55

1

4

Male

10

2.20

0.92

1.54

2.86

1

4

12

1.92

0.79

1.41

2.42

1

3

22

2.14

0.77

1.79

2.48

1

3

Both

36

2.28

1.11

1.90

2.65

1

5

36

1.89

0.71

1.65

2.13

1

3

36

2.06

0.89

1.75

2.36

1

4

Normal 6mm 15%

Female

26

2.35

1.26

1.84

2.86

1

5

24

2.00

0.83

1.65

2.35

1

3

14

1.86

0.86

1.36

2.36

1

3

Male

10

2.50

0.85

1.89

3.11

1

4

12

2.08

1.08

1.39

2.77

1

4

22

2.00

0.62

1.73

2.27

1

3

Both

36

2.39

1.15

2.00

2.78

1

5

36

2.03

0.91

1.72

2.34

1

4

36

1.94

0.71

1.70

2.19

1

3

Long 2mm 2%

Female

26

1.85

0.78

1.53

2.16

1

3

24

1.88

0.99

1.46

2.29

1

4

14

2.57

1.28

1.83

3.31

1

5

Male

10

2.20

1.40

1.20

3.20

1

4

12

2.33

1.44

1.42

3.25

1

5

22

2.36

1.14

1.86

2.87

1

4

Both

36

1.94

0.98

1.61

2.28

1

4

36

2.03

1.16

1.64

2.42

1

5

36

2.44

1.18

2.04

2.84

1

5

Short 2mm 15%

Female

26

1.85

0.88

1.49

2.20

1

4

24

2.00

0.83

1.65

2.35

1

4

14

2.71

1.07

2.10

3.33

1

5

Male

10

2.60

1.07

1.83

3.37

1

4

12

1.92

0.67

1.49

2.34

1

3

22

2.41

1.10

1.92

2.90

1

4

Both

36

2.06

0.98

1.72

2.39

1

4

36

1.97

0.77

1.71

2.23

1

4

36

2.53

1.08

2.16

2.89

1

5

Short 2mm 10%

Female

26

1.69

0.84

1.35

2.03

1

3

24

1.88

0.90

1.50

2.25

1

4

14

2.29

0.99

1.71

2.86

1

4

Male

10

3.10

0.88

2.47

3.73

2

4

12

2.92

1.16

2.18

3.66

1

5

22

2.45

1.30

1.88

3.03

1

5

Both

36

2.08

1.05

1.73

2.44

1

4

36

2.22

1.10

1.85

2.59

1

5

36

2.39

1.18

1.99

2.79

1

5

Long 2mm 10%

Female

26

2.08

1.13

1.62

2.53

1

5

24

2.17

1.01

1.74

2.59

1

4

14

2.79

1.05

2.18

3.39

1

4

Male

10

2.30

0.95

1.62

2.98

1

4

12

2.75

1.06

2.08

3.42

1

4

22

2.73

0.88

2.34

3.12

1

5

Both

36

2.14

1.07

1.78

2.50

1

5

36

2.36

1.05

2.01

2.72

1

4

36

2.75

0.94

2.43

3.07

1

5

Short 4mm 15%

Female

26

2.15

0.78

1.84

2.47

1

5

24

2.46

0.83

2.11

2.81

1

4

14

2.57

1.34

1.80

3.35

1

5

Male

10

2.80

1.32

1.86

3.74

1

5

12

2.50

1.09

1.81

3.19

1

4

22

2.82

0.66

2.52

3.11

2

4

Both

36

2.33

0.99

2.00

2.67

1

5

36

2.47

0.91

2.16

2.78

1

4

36

2.72

0.97

2.39

3.05

1

5

Normal 2mm 15%

Female

26

2.31

1.16

1.84

2.78

1

5

24

2.33

1.09

1.87

2.79

1

4

14

2.93

1.14

2.27

3.59

1

5

Male

10

3.10

1.10

2.31

3.89

1

5

12

2.08

0.90

1.51

2.66

1

4

22

2.68

0.99

2.24

3.12

1

5

Both

36

2.53

1.18

2.13

2.93

1

5

36

2.25

1.02

1.90

2.60

1

4

36

2.78

1.05

2.42

3.13

1

5

Normal 2mm 2%

Female

26

2.35

1.16

1.88

2.82

1

5

24

2.08

1.35

1.51

2.65

1

5

14

3.00

1.41

2.18

3.82

1

5

Male

10

3.40

0.97

2.71

4.09

2

5

12

2.67

0.98

2.04

3.29

1

4

22

2.55

1.26

1.99

3.11

1

5

Both

36

2.64

1.20

2.23

3.04

1

5

36

2.28

1.26

1.85

2.70

1

5

36

2.72

1.32

2.27

3.17

1

5

Normal 2mm 10%

Female

26

2.38

1.10

1.94

2.83

1

5

24

2.54

1.06

2.09

2.99

1

5

14

3.14

1.29

2.40

3.89

1

5

Male

10

3.00

0.82

2.42

3.58

1

4

12

2.42

0.79

1.91

2.92

1

4

22

2.77

1.11

2.28

3.26

1

5

Both

36

2.56

1.05

2.20

2.91

1

5

36

2.50

0.97

2.17

2.83

1

5

36

2.92

1.18

2.52

3.32

1

5

Short 0mm 15%

Female

26

2.27

1.15

1.80

2.73

1

5

24

3.04

0.91

2.66

3.43

2

5

14

2.79

1.37

2.00

3.58

1

5

Male

10

3.00

1.33

2.05

3.95

1

5

12

2.67

1.37

1.80

3.54

1

4

22

2.77

1.07

2.30

3.25

1

5

Both

36

2.47

1.23

2.06

2.89

1

5

36

2.92

1.08

2.55

3.28

1

5

36

2.78

1.17

2.38

3.17

1

5

Normal 4mm 15%

Female

26

2.85

1.19

2.37

3.33

1

5

24

2.42

1.02

1.99

2.85

1

5

14

2.50

1.02

1.91

3.09

1

5

Male

10

3.10

0.57

2.69

3.51

2

4

12

3.08

0.51

2.76

3.41

2

4

22

2.77

0.75

2.44

3.11

2

4

Both

36

2.92

1.05

2.56

3.27

1

5

36

2.64

0.93

2.32

2.95

1

5

36

2.67

0.86

2.38

2.96

1

5

Long 4mm 15%

Female

26

2.69

1.26

2.18

3.20

1

5

24

2.67

0.96

2.26

3.07

1

5

14

2.57

1.09

1.94

3.20

1

5

Male

10

3.50

0.71

2.99

4.01

3

5

12

2.58

0.79

2.08

3.09

1

4

22

3.00

0.82

2.64

3.36

2

4

Both

36

2.92

1.18

2.52

3.32

1

5

36

2.64

0.90

2.33

2.94

1

5

36

2.83

0.94

2.51

3.15

1

5

Short 2mm 15%

Female

26

2.54

1.14

2.08

3.00

1

4

24

2.75

0.99

2.33

3.17

1

5

14

3.36

1.28

2.62

4.09

1

5

Male

10

3.10

0.88

2.47

3.73

2

4

12

2.25

1.06

1.58

2.92

1

4

22

3.09

0.81

2.73

3.45

1

4

Both

36

2.69

1.09

2.33

3.06

1

4

36

2.58

1.02

2.24

2.93

1

5

36

3.19

1.01

2.85

3.54

1

5

Normal 0mm 15%

Female

26

3.12

1.31

2.59

3.64

1

5

24

2.92

1.02

2.49

3.35

1

5

14

3.14

1.29

2.40

3.89

1

5

Male

10

2.90

0.74

2.37

3.43

2

4

12

2.67

1.30

1.84

3.49

1

4

22

3.27

0.83

2.91

3.64

2

5

Both

36

3.06

1.17

2.66

3.45

1

5

36

2.83

1.11

2.46

3.21

1

5

36

3.22

1.02

2.88

3.57

1

5

Long 2mm 15%

Female

26

3.12

1.28

2.60

3.63

1

5

24

2.67

0.92

2.28

3.05

1

4

14

3.50

1.09

2.87

4.13

2

5

Male

10

3.30

0.48

2.95

3.65

3

4

12

2.50

0.67

2.07

2.93

2

4

22

3.41

0.80

3.06

3.76

2

5

Both

36

3.17

1.11

2.79

3.54

1

5

36

2.61

0.84

2.33

2.89

1

4

36

3.44

0.91

3.14

3.75

2

5

Normal 2mm 15%

Female

26

3.23

1.07

2.80

3.66

1

5

24

3.17

0.92

2.78

3.55

2

5

14

3.36

1.08

2.73

3.98

1

5

Male

10

3.10

0.99

2.39

3.81

2

5

12

3.00

0.60

2.62

3.38

2

4

22

3.50

0.67

3.20

3.80

2

5

Both

36

3.19

1.04

2.84

3.55

1

5

36

3.11

0.82

2.83

3.39

2

5

36

3.44

0.84

3.16

3.73

1

5

Long 0mm 15%

Female

26

3.50

0.99

3.10

3.90

2

5

24

3.42

1.06

2.97

3.86

2

5

14

3.64

1.08

3.02

4.27

2

5

Male

10

3.10

0.74

2.57

3.63

2

4

12

3.25

0.87

2.70

3.80

2

4

22

3.45

0.74

3.13

3.78

2

5

Both

36

3.39

0.93

3.07

3.71

2

5

36

3.36

0.99

3.03

3.70

2

5

36

3.53

0.88

3.23

3.82

2

5