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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.
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Azimi et al. (2016) studied this question.
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