Determination of the golden proportion and its implications in the esthetic setting of prosthetic teeth in African melanoderm subjects

Abstract

Introduction:The golden proportion is the sharing considered as the most harmonious of a size in two unequal parts. Its numerical value is of 1.618. Several authors demonstrated that anterior teeth dimensions of the Caucasians are based on the golden section and suggest that the esthetic assembly of the prosthetic teeth holds account of it. The present study searched for a correlation between anterior teeth dimensions and the golden proportion in the African melanoderm. Materials and Methods: Our study has been carried out in the School of Dentistry, Cocody-Abidjan Felix Houphouet Boigny University, Cote d'ivoire, Africa. 80 melanoderm Ivoirian subjects old 18-32 years were selected. Measurements were carried out on the anterior teeth and ratios were calculated between various measurements according to those established for the Caucasians. Diff erent relationships of the coronary mesiodistal diameter of the anterior teeth were calculated between themselves. The statistical parameter used is null hypothesis test. Results: The comparison of our results with the golden value for the Caucasians shows diff erences, not only from 1.618, but it is also inferior. Conclusion: Compared analysis of the median values obtained with the standard of beauty made it possible to note that there is not a correlation between dimensions of the teeth of the subjects of our study and the golden proportion.

Evaluation of the Golden Proportion in Patients Visiting the Oral Health Directorate of the Komfo Anokye Teaching Hospital, Kumasi

“…The ratios on the right side was found to be 1.52 for MCI/MLI on the right and 1.46 and 1.78 for left mci/mli and left MLI/MC respectively. Comparison of our MCI/MLI results with the study done by Pesson et al, revealed GP in a higher percentage of our subjects than the Ivorian melanoderms[16]. The re-A.…”

“…Demographic characteristics of study participants (n = 100). Frechner as quoted by Shillingburg et al, 1998, showed that the rectangles whose proportions meet the golden ratio are more pleasing to the sight [16]. Also, the measurement of the teeth was restricted to only the GP as explained by Levin, 1978 that during a smile only 62% of the width of the lateral incisor is displayed by the canines [7].…”

Mathematical Tooth Proportions: A Systematic Review

“…In reviewing the articles on golden proportion, the methodology in some of the papers stood out. Studies like that conducted by Pesson 37 focused on comparing measured values, using calipers, to the golden proportion proposed by Levin 4 . Although the measurements in Levin's paper were made from embrasure to embrasure, he had stated that his golden proportions were based on perceived width, as viewed from the front, and not measured width.…”

“…Most of the studies found on the golden proportion involved an assessment of how it compared to tooth proportions in different populations and ethnic groups. Studies were found in Asia, 10,[21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36] Africa, 37 and Europe, [38][39][40] but no studies on the North or South American population were found. In reviewing these articles, 62% of them found that the golden proportion did not exist in their respective populations (Table 2).…”

Assessment of Golden Proportion among Natural Maxillary Anterior Teeth of Global Population: A Systematic Review

“…Twenty-nine studies analyzed GP through 2D photographs [14,15,17,20,21,25,26,31-33, 37,40-42,45-51,56,58-60,63,64,68], 10 studies used dental casts [16,23,24,30,43,44,[53][54][55]61] while six studies used both methods of assessment [18,19,22,57,62,65]. Six studies performed direct clinical measurements of teeth on patients [35,36,38,39,66,67] and one study reported digital impressions, digital casts, and 2D photograph analysis in their research [52] (Table 2). All included studies [14][15][16][17][18][19][20][21][22][23][24][25][26] were categorized according to their geographical location.…”