Table 1.

Distribution of altered photographs options in the survey

Smile parameter	First option	Second option	Third option
Mesiodistal width	Bilateral increase in width of central incisors by 1-2 mm	Unilateral increase in width of central incisors by 1-2 mm	Unaltered photograph
Mesiodistal width	Unaltered photograph	Unilateral decrease in the width of central incisors by 1-2 mm	Bilateral decrease in the width of central incisors by 1-2 mm
Gingivoincisal length	Bilateral increase in length of central incisors by 1-2 mm	Unaltered photograph	Unilateral increase in length of central incisors by 1-2 mm
Gingivoincisal length	Unaltered photograph	Unilateral decrease in length of central incisors by 1-2 mm	Bilateral decrease in length of central incisors by 1-2 mm
Width of buccal corridors	Narrow buccal corridors (showing up to the distal surface of the first premolar)	Unaltered photograph	Narrow buccal corridors (showing only up to the mesial surface of the second premolar)
Amount gingival display	0 mm of gingival display	<3 mm gingival display	Unaltered photograph
Distance between lower lip and the tip of upper anterior teeth	Lower lip covering 1 mm of the upper anterior teeth	Unaltered photograph	Lower lip covering >1 mm of the upper anterior teeth
Smile arc	Reversed smile arc	Straight smile arc	Unaltered photograph
Position of lower midline in relation to the upper midline	Lower midline shifted by 2 mm in relation to the upper midline	Unaltered photograph	Lower midline shifted by 1 mm in relation to the upper midline