Lay preferences for dentogingival esthetic parameters: A systematic review.

Del Monte, Stefano; Afrashtehfar, Kelvin Ian; Emami, Elham; Abi Nader, Samer; Tamimi, Faleh (2017). Lay preferences for dentogingival esthetic parameters: A systematic review. The journal of prosthetic dentistry, 118(6), pp. 717-724. Elsevier 10.1016/j.prosdent.2017.04.032

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STATEMENT OF PROBLEM An objective definition of the characteristics that render a smile esthetically acceptable in the eye of laypeople is lacking. PURPOSE The purpose of this systematic review was to identify, appraise, and synthesize the available evidence on the opinion of laypeople regarding the dentogingival characteristics that render a smile esthetically acceptable. The evidence was collected by surveying with standardized digitally modified smile images. MATERIAL AND METHODS Four databases were used to search English language studies published between January 1996 and December 2015. This was complemented by a manual search of 8 dental journals. Following the Preferred Reporting Items for Systematic reviews and Meta-Analyses (PRISMA) guidelines, 2 independent reviewers extracted the relevant characteristics of lay evaluators, the images evaluated, and the outcomes measure. Included studies were assessed in agreement with the Strengthening the Reporting of Observational Studies in Epidemiology (STROBE) statement. Outcomes were treated as a continuous variable, and when more than 1 article provided information on a parameter, the weighted arithmetic mean was calculated. RESULTS After 8851 articles were screened, 20 studies were included. Those studies addressed 20 different dentogingival esthetic parameters. The total number of participants interviewed was 3107. According to the Olmos classification, 6 studies had a high level of quality, and 14 studies had a moderate level of quality. The 2 reviewers agreed on all the quality assessments. In the articles reviewed, central incisors clearly played a key role in smile esthetics. Almost all dental, gingival, and occlusal parameters are related to the proportion, shape, and position of central incisors and their relation to the adjacent dental structures. CONCLUSIONS The present review provides the estimated thresholds of tolerability and ideal values of smile parameters determined by laypeople. This may guide clinicians in evidence-based diagnosis and the planning of dental esthetic treatments.

Item Type:

Journal Article (Review Article)


04 Faculty of Medicine > School of Dental Medicine
04 Faculty of Medicine > School of Dental Medicine > Department of Reconstructive Dentistry and Gerodontology

UniBE Contributor:

Afrashtehfar, Kelvin Ian


600 Technology > 610 Medicine & health








Vanda Kummer

Date Deposited:

22 Jul 2019 17:01

Last Modified:

22 Oct 2019 19:10

Publisher DOI:


PubMed ID:





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