Table of Contents Author Guidelines Submit a Manuscript
International Journal of Dentistry
Volume 2017, Article ID 2637148, 7 pages
Research Article

Influence of the Smile Line on Smile Attractiveness in Short and Long Face Individuals

1Smile Spa Dental Clinic, Dubai, UAE
2Ajman University of Science and Technology, Ajman, UAE
3Department of Orthodontic & Pediatric Dentistry, Faculty of Dentistry, University of Jordan, Amman, Jordan

Correspondence should be addressed to Amjad Al Taki; moc.liamtoh@ikat_la

Received 6 March 2017; Accepted 5 July 2017; Published 8 August 2017

Academic Editor: Carlos A. Munoz-Viveros

Copyright © 2017 Amjad Al Taki et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Objectives. The study assessed the impact of facial height on attractiveness of smile, in association with the maxillary gingival display. This research was performed by dental professionals and laypersons. Materials and Methods. Frontal extraoral photographs were captured for both short and long faces. The photographs were modified using software for image-processing and three rater groups (orthodontists, dentists, and laypersons) evaluated the smile attractiveness, with 30 subjects in each group. Differences in ratings of the different smiles among the different experimental groups were examined using the Kruskal-Wallis test. The Mann–Whitney U test was performed for pairwise comparisons between the experimental groups. Results. Dentists and laypeople were most likely to agree. For the short face, laypeople and dentists both rated the +2 mm gingival display smile as the most attractive smile whilst orthodontists ranked the 0 mm gingival display smile as the most attractive smile. For the long face, laypeople and dentists ranked the 0 mm gingival display smile as the most attractive smile, whilst orthodontists ranked the +2 mm gingival display as the most attractive. Conclusion. Smile line of both short and long face subjects was found to influence the smile attractiveness rating by the three rater groups.