Related Experiment Video
Updated: Jun 20, 2025

Author Spotlight: 3D Movement Assessment of Maxillary Posterior Teeth in Clear Aligner Treatment
Published on: February 23, 2024
Comparison of the width-to-height ratio in maxillary anterior teeth in different populations: A systematic review and
Hatice Özdemir1, Memiş Özdemir2
1Associate Professor, Department of Prosthodontics, Faculty of Dentistry, Atatürk University, Erzurum, Turkey.
Statement Of Problem:
The width-to-height (W/H) ratio values of maxillary anterior teeth are parameters used in esthetic dentistry. However, a meta-analysis of studies evaluating these parameters in individuals from different countries, taking sex into account, is lacking.
Purpose:
The purpose of this systematic review and meta-analysis was to determine and compare the W/H ratio values seen in the maxillary anterior teeth of different populations.
Material And Methods:
A systematic search was performed using the PubMed/Medline, Google Scholar, and Web of Science databases to identify English and non-English language articles reporting the golden ratio, golden percentage, tooth ratio, tooth size, W/H ratio, maxillary tooth width, maxillary tooth height, maxillary anterior tooth size, and dental esthetics. The titles, full text, and abstracts were scanned by 2 investigators independently to identify articles that fulfilled the inclusion criteria. Using a meta-analysis software program, data extracted from each selected study were statistically combined using the random-effects model, and the weighted mean differences were calculated.
Results:
The search protocol resulted in a total of 987 articles, but only 15 articles fulfilling the inclusion criteria were included in the meta-analysis. While the sample size varied between 50 and 412 in the 15 analyzed studies, a total of 2304 individuals from 12 countries were evaluated. As a result of the evaluation of the general W/H means of the maxillary anterior teeth, the largest teeth were seen in Korea and Pakistan, and the general mean W/H ratios of the central, lateral, and canine teeth showed no statistically significant difference between sexes (P>.05).
Conclusions:
As a result of the meta-analyses of the W/H ratios of the maxillary central, lateral, and canine teeth, the differences between populations were found not to be statistically significant.
Related Concept Videos
Teeth
In the bud stage, the tooth germ (an aggregation of cells) starts to form in the developing jawbone. During the cap stage, the tooth germ differentiates into enamel organ, dental papilla, and dental sac, which will later develop into the tooth's enamel, dentin...
One-Way ANOVA: Equal Sample Sizes
Different sample means can result in different values for the variance estimate: variance between samples. This is because the variance between samples is calculated as the product of the sample size and the variance between the...
One-Way ANOVA: Unequal Sample Sizes
Testing a Claim about Mean: Unknown Population SD
Estimating a population mean requires the samples to be approximately normally distributed. The data should be collected from the randomly selected samples having no sampling bias. There is no specific requirement for sample size. But if the sample size is less than 30, and we don't know the population standard deviation, a different approach is used;...
The Ratio of X Chromosome to Autosomes
Normal male Drosophila has a ratio of one X chromosome to two sets of autosomes. In contrast, normal female...
Central Limit Theorem
The sample size, n, that...

