The effect of the buccal corridor and tooth display on smile attractiveness


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Australasian Orthodontic Journal

Australian Society of Orthodontists

Subject: Dentistry, Orthodontics & Medicine


ISSN: 2207-7472
eISSN: 2207-7480





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VOLUME 31 , ISSUE 2 (November 2015) > List of articles

The effect of the buccal corridor and tooth display on smile attractiveness

Esfandiar Akhavan Niaki / Sepideh Arab * / Ahmadreza Shamshiri / Mohammad Moslem Imani

Citation Information : Australasian Orthodontic Journal. Volume 31, Issue 2, Pages 195-200, DOI:

License : (CC BY 4.0)

Published Online: 15-August-2021



Aims: The aim of the present study was to evaluate the lay perception of the effect of the buccal corridor and amount of toothgingival display on the attractiveness of a smile in different facial types.

Materials and methods: Using Adobe Photoshop CS3 software, frontal facial images of two smiling Iranian female subjects (one short-faced and one long-faced) were altered to create different magnitudes of buccal corridor display (5, 10, 15, 20 and 25%) and tooth-gingival display (2 mm central incisor show, 6 mm central incisor show, total central incisor show, total tooth show with 2 mm gingival show and total tooth show with 4 mm gingival show). Sixty Iranians (30 males and 30 females) rated the attractiveness of the pictures on a 1–5 point scale.

Results: Narrower smiles were preferred in long-faced subjects compared with short-faced subjects. Minimal tooth show was more attractive than excessive gingival display in short-faced subjects. There were no gender specific, statistically significant differences found in the ratings given by the lay assessors.

Conclusions: Harmonious geometry of the smile and face in both the vertical and transverse dimensions influences smile attractiveness and this should be considered in orthodontic treatment planning.

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