Journal of Isfahan Dental School

Evaluation of the Factors Affecting Smile Attractiveness in Patients Seeking Orthodontic Treatment

Document Type : مقاله‌های پژوهشی

Authors

1 Assistant Professor, Dental Research Center, Department of Orthodontics, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran.

2 Professor, Dental Materials Research Center, Department of Orthodontics, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran.

3 Dental Student, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran.

4 Postgraduate Student, Department of Orthodontics, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran.

Abstract

Introduction: Knowledge about the factors that play a great role in smile attractiveness of subjects seeking orthodontic treatment helps the orthodontist in treatment planning and deciding to refer patients for adjunctive treatments. The aim of this study was to determine which factors influence smile attractiveness in subjects seeking orthodontic treatment.
Materials & Methods: In this cross sectional study ,The sample consisted of 45 smile photographs in frontal view belonging to 45 female patients seeking orthodontic treatment and presenting class I, Class II or class III malocclusions. Sixty laypersons (30 males, 30 females) were asked to assess the attractiveness of smile photographs. Each judge was requested to rate the photographs from 0 to 100 using a visual analog scale (VAS). Afterwards, smile images were entered to "Smile Analyzer" software and the amount of incisor show, gingival display, buccal corridor ratio, smile index, philtrum height and commisure height were measured. Finally, the effect of various features on smile attractiveness was analyzed using multiple linear regression analysis. 
Results: The linear regression analysis revealed that according to the judgment of males and total female and male raters, philtrum height had a significant influence on smile attractiveness (p value < 0.05). Female judges considered philtrum and commisure heights as two variables contributing to smile attractiveness (p value < 0.05).
Conclusion: The results of this study indicate that according to the judgment of laypersons, philtrum height and commisure height have significant effects on smile attractiveness of patients seeking orthodontic treatment, so that smile attractiveness was predictably reduced by decreasing philtrum height and increasing commissure height. 
Key words: Smile attractiveness, Orthodontic treatment, Gingival display, Buccal corridor malocclusion, Commisure height, Smile index

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Journal of Isfahan Dental School
Volume 14, Issue 2 - Serial Number 2
March 2018
Pages 113-122