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Submitted: 17 Jun 2015
Revision: 14 Oct 2015
Accepted: 22 Oct 2015
ePublished: 27 Feb 2016
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Avicenna J Dent Res. 2017;9(1): e30267.
doi: 10.5812/ajdr.30267
  Abstract View: 1568
  PDF Download: 1230

Research Article

Evaluating Recurring Esthetic Dental Proportion (RED) and Golden Proportion in Natural Dentition

Maryam Azimi 1, Maryam Dinparvar 2*, Hosna Teimourian 3, Maryam Farhadian 4

1 Department of Prosthodontics, Faculty of Dentistry, Shahed University, Tehran, IR Iran
2 Department of Orthodontics, Faculty of Dentistry, Hamadan University of Medical Sciences, Hamadan, IR Iran
3 Department of Operative and Esthetic Dentistry, Faculty of Dentistry, Kermanshah University of Medical Sciences, Kermanshah, IR Iran
4 Department of Biostatistics and Epidemiology, Faculty of Public Health, Hamadan University of Medical Sciences, Hamadan, IR Iran
*Corresponding Author: * Corresponding author: Maryam Dinparvar, Department of Orthodontics, Faculty of Dentistry, Hamadan University of Medical Sciences, Hamadan, IR Iran. Tel: +98-9124077438, E-mail: , Email: mrm.dinparvar@gmail.com

Abstract

Background: The width ratio of teeth is an important factor in dental and facial esthetics. The Golden proportion (62%) and the recurring esthetic dental proportion (RED) are two theories in this field that have been suggested to create harmony among anterior teeth. These have rarely been studied among the Iranian population.

Objectives: The aim of this study was to evaluate the Golden proportion and RED proportion in students, staff, and patients of Shahed dental school.

Patients and Methods: This study was conducted with 116 subjects in Shahed dental school photographs of the subject’s anterior teeth were taken from the frontal view. The perceived width ratios of canine to lateral incisor and lateral incisor to central incisor were calculated. In this study, the Golden proportion was evaluated within the range of 0.55 – 0.64. To evaluate the existence of the RED proportion in each subject, the width ratio of canine to lateral incisor was compared with the width ratio of lateral incisor to central incisor.

Results: The Golden proportion existed in 25% of the perceived width ratios of lateral incisor to central incisor, and 2.1% of the width ratios of canine to lateral incisor in natural dentition. The RED proportion existed in 18.5% of subjects, and the most recurring proportion was 0.73 in these subjects.

Conclusions: The Golden proportion and the RED proportion cannot be used as constant proportions to create a harmonious proportion throughout the width of maxillary anterior teeth.


 
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