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Laypeople's and dental students' perceptions of a diastema between central and lateral incisors: Evaluation using scanpaths and colour‐coded maps
Author(s) -
Tanaka Orlando,
Vitral Robert Willer Farinazzo,
Miyoshi Caio Seiti,
Meira Thiago Martins,
Camargo Elisa Souza,
Pithon Matheus Melo
Publication year - 2020
Publication title -
orthodontics and craniofacial research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.664
H-Index - 55
eISSN - 1601-6343
pISSN - 1601-6335
DOI - 10.1111/ocr.12401
Subject(s) - diastema , maxillary central incisor , orthodontics , dentistry , perception , eye tracking , medicine , psychology , computer science , computer vision , neuroscience
Abstract Objective This study aimed to use eye tracking to analyse people's visual perceptions of smiles with a diastema between the maxillary central and lateral incisors, based on different categories of observers. Setting and Sample Populations An image of a diastema between the maxillary central and lateral incisors was shown to dental students and laypeople. Materials and Methods Our null hypothesis was that there would be no difference in the visual perception of the different graduations of diastemas between the two groups. The diastemas were edited in Photoshop® to gradually increase the distance between the maxillary central and lateral incisors from no diastema to 1.5 mm and 3.5 mm diastemas. These diastemas were evaluated by using a TheEyeTribe© tracker in conjunction with OGAMA © 5.0 software. A total of 37 dental students and 33 laypeople looked at eight randomly arranged images of smiles. The data were analyzed using color coded maps, scanpaths, and the Kruskal‐Wallis test with a level of significance of 5%. Results Laypeople tended to observe the eyes, focusing more on the right than the left, and spent less time focusing on the diastema region than did the dental students. There were differences for the same magnitude of diastema within participant groups. As the width of the diastema increased, both students and laypeople focused more on the diastema region. Conclusions The two groups of evaluators presented different perceptions of smiles in cases of diastema between the maxillary central and lateral incisors when evaluated using eye‐tracking.