The Perception of Asymmetries in Occlusal Plane in the Frontal View among Laypeople: An Eye-tracking StudyCorrespondence Address :
Dr. Orlando Motohiro Tanaka,
R Imaculada Conceição, 1155, Curitiba, ParanĂˇ, Brazil.
Introduction: Eye-tracking studies have explored the need for orthodontic treatment and treatment outcomes from a lay perspective as a newer diagnostic tool versus traditional assessments based on static photographs.
Aim: To evaluate the visual aesthetic perceptions of laypeople with regard to occlusal plane cant in a frontal smile analysis.
Materials and Methods: Images of smiling male and female faces had occlusal plane cant added with Photoshop CC on the magnitudes of 0°, 2°, and 2.5° to the left side on the female face and the male to the right side. To obtain eye-tracking data, two software programs, OGAMA and The Eye Tribe Tracker® , were used together. Thirty male and 30 female laypeople raters were selected from the student population of a university (PontifĂcia Universidade CatĂłlica do ParanĂˇ) and consisted of undergraduate students and not those of dentistry, to visualise ocular movement in the Areas of Interest (AOI). A One-Way Analysis of Variance (ANOVA) was applied to compare one of the independent variables with the dependent variable.
Results: Eye-tracking showed that the laypeople identified a triangle shape between the right eye, left eye, and mouth with greater fixation of the eyes. There were statistically significant differences according to the number of fixations at the mouth and menton.
Conclusion: Laypeople were not able to perceive the occlusal plane cant located on the right side of the male face or to the left on the female face. However, it is important to do take the laypeople perspective into consideration when making treatment alternatives.
Asymmetry, Frontal smile, Occlusal cant
Date of Submission: Nov 09, 2019
Date of Peer Review: Dec 06, 2019
Date of Acceptance: Jan 30, 2020
Date of Publishing: Feb 01, 2020
• Financial or Other Competing Interests: No
• Was Ethics Committee Approval obtained for this study? Yes
• Was informed consent obtained from the subjects involved in the study? Yes
• For any images presented appropriate consent has been obtained from the subjects. Yes
PLAGIARISM CHECKING METHODS:
• Plagiarism X-checker: Nov 19, 2019
• Manual Googling: Jan 20, 2020
• iThenticate Software: Jan 30, 2020 (11%)
ETYMOLOGY: Author Origin
- Emerging Sources Citation Index (Web of Science, thomsonreuters)
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- Academic Search Complete Database
- Directory of Open Access Journals (DOAJ)
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- Indian Science Abstracts (ISA)
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- Popline (reproductive health literature)