Abstract
Statement of problem
The color and form of teeth are 2 of the 3 main determinants of success in an esthetic
restoration; the third is dental proportion. A recent systematic review of the literature
devoted to the evaluation of dental proportion is lacking.
Purpose
The purpose of this systematic review was to investigate the quality and outcome of
studies into maxillary anterior tooth proportion and to determine whether dental proportion
ratios based on different geographic regions are appropriate.
Material and methods
An electronic search was conducted using PubMed, MEDLINE, Google Scholar, Embase,
Scopus, Cochrane Library, Web of Science, and Science Direct databases. English-language
articles reporting with the specific combination of medical subject heading (MeSH)
key words were analyzed by 2 investigators. The titles, full text, and abstracts were
scanned by investigators independently to identify articles that fulfilled the inclusion
criteria. The general characteristics, outcomes, and quality of each study were reviewed
and analyzed systematically.
Results
The search plan resulted in a total of 73 articles until September 2020; of which,
16 articles fulfilling the inclusion criteria were selected. The geographic distribution
of the selected article revealed 12 articles from Asia, 2 from Continental Europe,
and 2 from the United Kingdom. Golden percentage values of 25%, 15%, and 10% for central,
lateral incisor, and canine teeth were not found. The mean predicted dental percentage
was either larger or smaller than the successive widths of maxillary natural anterior
teeth.
Conclusions
The golden percentage could not be used to formulate a smile design. Rather, the dental
ratios should be set on a racial and ethnic basis for a population.
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Article info
Publication history
Published online: August 02, 2021
Identification
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© 2021 by the Editorial Council for the Journal of Prosthetic Dentistry.
