Özdemir H, Özdemir M. Evaluation of the parameters related to the golden ratio in the teeth of individuals from different countries: A systematic review and meta-analysis. J Prosthet Dent 2023; DOI: 10.1016/j.prosdent.2023.09.032.

Dental aesthetic ratios should be set based on the racial and ethnic character of a population.

Golden proportion, golden percentage, and recurring esthetic dental (RED) proportion are parameters used in aesthetic dentistry. However, a meta-analysis of studies evaluating these parameters in individuals from different countries is lacking. The purpose of this systematic review and meta-analysis was to determine and compare the golden ratio, golden percentage, and RED ratio values as seen in the maxillary anterior teeth of individuals from different countries. A systematic search was performed using PubMed/Medline, Google Scholar, and Web of Science to identify articles. The search protocol resulted in a total of 752 articles, but only 26 articles fulfilling the inclusion criteria were included in the meta-analysis. While the sample size varied between 46 and 384 in the 26 analysed studies, a total of 3786 individuals from 12 countries were evaluated. No similarity was found using the aesthetic parameters determined in the populations to which the meta-analysis was applied. Mathematical formulas did not provide consistent results that would allow for their use as a standardised guide for creating natural-looking smiles. Rather, dental aesthetic ratios should be set based on the racial and ethnic character of a population.