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:: Volume 31, Issue 1 (1-2019) ::
J Islam Dent Assoc Iran 2019, 31(1): 21-25 Back to browse issues page
Esthetic Perception of Recurring Esthetic Dental Proportion in Different Lip Line Positions Among Lay People
Parham Pedram 1, Hamid Kermanshah 2, Reza Nejatbakhsh 3, Ladan Ranjbar Omrani * 4, Shiva Rafiezadeh 5
1- PhD Candidate of Dental Biomaterials, Department of Dental Biomaterials, School of Dentistry, Tehran University of Medical Sci-ences, Tehran, Iran
2- Associate Professor, Dental Research Center, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran AND Department of Restorative Dentistry, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
3- Orthodontist, Private Practice, Tabriz, Iran
4- Associate Professor, Dental Research Center, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran AND Department of Restorative Dentistry, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran , ladanomrani@yahoo.com
5- Assistant Professor, Department of Restorative Dentistry, School of Dentistry, Bushehr University of Medical Sciences, Bushehr, Iran
Abstract:   (88 Views)
Background and Aim: The proportion of smile is a useful tool for creating geometric smiles which are a critical aspect in esthetic dentistry. The aim of this study was to determine the effect of lip line position on acceptable Recurring Esthetic Dental (RED) proportion among lay people.
Materials and Methods: A photograph of pose smile of a young female was taken. The position of the lip was changed by Adobe Photoshop CS6 software within three positions (low, medium, and high). Then, we created three RED proportions (54%, 62%, and 70%) for each lip line position. The photographs were ranked from most to least attractive (one to nine) by 40 lay people (20 females and 20 males) with a mean age of 19.4 years. Data were collected and analyzed using Friedman test. Pairwise comparisons were made using Bonferroni correction. The impact of gender on the ratings was evaluated using repeated measures analysis of variance (ANOVA).
Results: In the medium lip line group, all three proportions had approximately the same preference rates. The 54% proportion was the least attractive one in the high lip line group (mean=6.819), and the 70% proportion was the least attractive one in the low lip line group (mean=6.881).
Conclusion: The acceptable RED proportion cannot be evaluated without consideration of other factors such as lip line position. Esthetics is the result of a harmonious balance between different elements.
Keywords: Dental Esthetic, Smiling, Dental Photography
Full-Text [PDF 335 kb]   (26 Downloads)    
Type of Study: Orginal | Subject: Restorative Dentistry
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Pedram P, Kermanshah H, Nejatbakhsh R, Ranjbar Omrani L, Rafiezadeh S. Esthetic Perception of Recurring Esthetic Dental Proportion in Different Lip Line Positions Among Lay People . J Islam Dent Assoc Iran. 2019; 31 (1) :21-25
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Volume 31, Issue 1 (1-2019) Back to browse issues page
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