@article{3340361, title = "Perception of smile attractiveness among laypeople and orthodontists regarding the buccal corridor space, as it is defined by the eyes. An innovated technique", author = "Ntovas, P. and Karkazi, F. and Özbilen, E.Ö. and Flavio, A. and Ladia, O. and Papazoglou, E. and Yilmaz, H.N. and Coachman, C.", journal = "Journal of Esthetic and Restorative Dentistry", year = "2023", volume = "35", number = "2", pages = "345-351", publisher = "John Wiley and Sons Inc", issn = "1496-4155, 1708-8240", doi = "10.1111/jerd.13005", keywords = "adult; art; article; Caucasian; controlled study; cross-sectional study; facial expression; human; layperson; major clinical study; male; orthodontist; perception; pupil; rank sum test; visual analog scale; dental procedure; face; health personnel attitude; perception; physiology, Attitude of Health Personnel; Cross-Sectional Studies; Esthetics, Dental; Face; Humans; Male; Orthodontists; Perception; Smiling", abstract = "Objective: To investigate whether there is a relationship between the distance between the iris and pupil with the ideal size of buccal corridors. Materials and Methods: A full-portrait image of a male Caucasian was used to create a set of 11 digitally modified images with different buccal corridor space. A web-based cross-sectional study was designed and distributed via an online survey to 200 laypeople and 200 orthodontists to assess image attractiveness, using a Visual analogue scale. For the statistical analysis, Wilcoxon signed-rank and Mann–Whitney U tests were used. The significance level was set at p < 0.05. Results: The response rate for laypeople was 70% (n = 139), while the rate for orthodontists was 73% (n = 146). For the layperson group, the maximum smile attractiveness score was 10% of buccal width reduction, compared to the iris-pupillary distance, while for the orthodontists, it was 20%. The attractiveness of the smile was significantly reduced in both groups when the buccal corridor width was increased in comparison to the iris-pupillary distance. Conclusion: The length between the mesial part of the iris and the distal of the pupil, may constitutes a landmark for the estimation of the desired width of the buccal corridor. Clinical Relevance: Inter iris-pupillary distance can be the starting point in the smile designing process, in order to perform a facial driven selection of buccal corridor size. © 2023 Wiley Periodicals LLC." }