Table 1 Descriptive statistics (x = mean values, SD = standard deviations) of assessments on the scale 1–10 (1-least acceptable; 10-the most pleasing esthetically) of Preclinical and Clinical students, Female and Male students, and students who had experience in assisting or had a dentist in the immediate family

Photograph

x (SD)

x (SD)

x (SD)

x (SD)

x (SD)

x (SD)

T

O

O

H

S

H

A

D

E

Reference photograph

(5500 K)

8.31 (1.41)

8.06 (1.30)

8.22 (1.39)

8.06 (1.22)

8.03 (1.50)

8.36 (1.19)

lighter

Right maxillary incisor at 5100 K

7.16 (1.71)

5.97 (1.75)

6.54 (1.85)

6.91 (1.65)

6.30 (1.73)

6.90 (1.97)

Right maxillary incisor at 4700 K

5.28 (2.35)

3.83 (1.62)

4.49 (2.12)

5.18 (2.30)

4.20 (1.93)

4.99 (2.31)

Right maxillary incisor at 4300 K

4.05 (2.31)

2.57 (1.80)

3.22 (2.13)

4.06 (2.47)

2.91 (1.92)

3.97 (2.39)

darker

Right maxillary incisor at 5900 K

7.41 (1.37)

6.72 (1.84)

7.07 (1.62)

7.18 (1.79)

7.03 (1.79)

7.14 (1.40)

Right maxillary incisor at 6300 K

6.01 (1.79)

5.02 (1.87)

5.49 (1.87)

5.85 (2.00)

5.49 (1.83)

5.60 (1.96)

Right maxillary incisor at 6700 K

4.36 (2.07)

3.38 (1.80)

3.82 (1.98)

4.30 (2.07)

3.63 (1.85)

4.16 (2.11)

lighter

Both maxillary incisors at 5100 K

6.32 (2.04)

5.55 (1.95)

5.88 (2.03)

6.33 (2.03)

5.79 (2.12)

6.13 (1.93)

Both maxillary incisors at 4700 K

4.14 (2.18)

3.06 (1.62)

3.52 (1.96)

4.33 (2.27)

3.37 (1.84)

3.93 (2.17)

Both maxillary incisors at 4300 K

3.35 (2.18)

2.07 (1.37)

2.61 (1.82)

3.64 (2.46)

2.43 (1.74)

3.11 (2.12)

darker

Both maxillary incisors at 5900 K

7.55 (1.75)

7.49 (1.49)

7.50 (1.74)

7.61 (1.22)

7.63 (1.68)

7.41 (1.65)

Both maxillary incisors at 6300 K

5.90 (1.94)

5.62 (1.93)

5.74 (1.88)

5.94 (2.16)

5.72 (2.00)

5,83 (1.86)

Both maxillary incisors at 6700 K

5.56 (2.07)

5.32 (2.01)

5.43 (2.10)

5.52 (2.05)

5.39 (2.07)

5.50 (2.12)

darker

Both maxillary canines at 5900 K

7.54 (1.71)

7.51 (1.58)

7.54 (1.69)

7.42 (1.41)

7.50 (1.71)

7.55 (1.58)

Both maxillary canines at 6300 K

6.53 (1.99)

6.51 (1.90)

6.58 (1.97)

6.48 (1.75)

6.65 (1.97)

6.48 (1.99)

Both maxillary canines at 6700 K

5.09 (2.23)

4.89 (2.13)

4.99 (2.25)

5.00 (2.14)

4.97 (2.17)

5.02 (2.29)

Lighter gingiva (4300 K)

5.66 (2.73)

5.47 (2.71)

5.77 (2,67)

4.55 (2.76)

5.69 (2.73)

5.45 (2.71)

L

E

N

G

T

H

Shortened both maxillary central incisors

5.07 (2.17)

4.74 (2.11)

4.94 (2.09)

4.79 (2.45)

4.71 (2.16)

5.07 (2.14)

Elongated both maxillary lateral incisors to the length of central incisors

7.01 (2.18)

5.84 (2.02)

6.49 (2.12)

6.39 (2.44)

6.17 (2.12)

6.78 (2.18)

Elongated incisal edges of both maxillary lateral incisors to the length of canines

5.96 (2.40)

5.25 (2.10)

5.63 (2.29)

5.7 (2.62)

5.38 (2.40)

5.89 (2.25)

Beveled both maxillary lateral incisors distal edge

5.97 (2.46)

4.55 (2.45)

5.27 (2.46)

5.45 (3.01)

4.84 (2.41)

5.77 (2.61)

Elongated canines

5.58 (2.69)

4.62 (2.52)

5.15 (2.61)

5.09 (2.92)

4.89 (2.68)

5.39 (2.62)

P

O

S

I

T

I

O

N

Central diastema

4.60 (2.41)

4.15 (2.10)

4.45 (2.32)

4.12 (2.12)

4.25 (2.31)

4.54 (2.28)

Multiple diastemas

5.02 (0.30)

4.98 (0.20)

5.00 (0.29)

5.03 (0.25)

4.98 (0.34)

5.02 (0.17)

Typical rotation of the right lateral maxillary incisor

+ 10⁰

6.58 (2.20)

5.67 (1.98)

6.23 (2.22)

5.82 (2.11)

5.91 (2.13)

6.42 (2.25)

+ 20⁰

4.23 (2.39)

3.52 (1.79)

3.96 (2.13)

3.61 (2.30)

3.65 (1.90)

4.15 (2.37)

+ 30⁰

3.13 (2.05)

2.56 (1.54)

2.92 (1.83)

2.61 (1.95)

2.71 (1.69)

3.03 (2.00)

Atypical rotation of the right lateral maxillary incisor

− 10⁰

5.99 (2.27)

5.04 (2.17)

5.61 (2.54)

4.93 (2.68)

5.28 (2.40)

5.84 (2.11)

− 20⁰

6.20 (2.31)

4.95 (2.11)

5.73 (2.24)

5.09 (2.57)

5.31 (2.35)

5.95 (2.22)

− 30⁰

5.50 (2.56)

3.82 (2.17)

4.81 (2.51)

4.36 (2.61)

4.37 (2.51)

5.11 (2.50)