Perspectives of laypeople towards the morphological characteristics of a youthful smile on frontal view: A computerized simulated photographic evaluation

Q1 Medicine

Journal of oral biology and craniofacial research Pub Date : 2025-03-22 DOI:10.1016/j.jobcr.2025.03.008

Marzieh Mazhari , Sanaz Zemanatkheiri , Mehrnaz Moradinejad

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引用次数: 0

Abstract

Background

The desire for a youthful smile is not limited by age, as individuals seek it throughout their lifetime. Aging affects the components of a smile; accordingly, this study assessed the perspectives of laypeople towards the morphological traits of a youthful smile on the frontal view. In this psychometric study, a 26-year-old female with a normal face, normal occlusion, teeth alignment, and no previous cosmetic surgery was employed as the photo model; sixteen smile images were obtained via Adobe Photoshop by varying incisal display, vertical step between maxillary central and lateral incisor, smile arch form, and buccal corridor size. The prepared photos were given to the layperson participants using an online questionnaire for age estimation.

Results

A total of 195 laypersons participated in the study. The results revealed that a 2 mm reduction, 4 mm increase, and 4 mm reduction in incisor display would increase the age estimation (P-Value<0.001). Futher, 1 mm reduction, a 0.5 mm reduction, and 0.5 mm increase in vertical step would contribute to overestimation of the age (P-Value<0.001). Additionally, the smile arc's reversed, straight, and moderate convexity increased the age estimation (P-Value<0.001). Regarding buccal corridor size, 1- and 2-mm reduction plus 2-mm increase resulted in age estimates significantly older than the original image (P-Value<0.001).

Conclusion

Perceptions of youthfulness are influenced by morphological traits such as incisor display, vertical step between central and lateral, smile arch form, and buccal corridor size.

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来源期刊

Journal of oral biology and craniofacial research Medicine-Otorhinolaryngology

CiteScore

4.90

自引率

0.00%

发文量

133

审稿时长

167 days

期刊介绍： Journal of Oral Biology and Craniofacial Research (JOBCR)is the official journal of the Craniofacial Research Foundation (CRF). The journal aims to provide a common platform for both clinical and translational research and to promote interdisciplinary sciences in craniofacial region. JOBCR publishes content that includes diseases, injuries and defects in the head, neck, face, jaws and the hard and soft tissues of the mouth and jaws and face region; diagnosis and medical management of diseases specific to the orofacial tissues and of oral manifestations of systemic diseases; studies on identifying populations at risk of oral disease or in need of specific care, and comparing regional, environmental, social, and access similarities and differences in dental care between populations; diseases of the mouth and related structures like salivary glands, temporomandibular joints, facial muscles and perioral skin; biomedical engineering, tissue engineering and stem cells. The journal publishes reviews, commentaries, peer-reviewed original research articles, short communication, and case reports.