Dimensional analyses of frontal posed smile attractiveness in Japanese female patients

Abstract

Objective: To identify appropriate dimensional items in objective diagnostic analysis for attractiveness of frontal posed smile in Japanese female patients by comparing with the result of human judgments. Materials and Methods: Photographs of frontal posed smiles of 100 Japanese females after orthodontic treatment were evaluated by 20 dental students (10 males and 10 females) using a visual analogue scale (VAS). The photographs were ranked based on the VAS evaluations and the 25 photographs with the highest evaluations were selected as group A, and the 25 photos with the lowest evaluations were designated group B. Then 12 dimensional items of objective analysis selected from a literature review were measured. Means and standard deviations for measurements of the dimensional items were compared between the groups using the unpaired t-test with a significance level of P , .05. Results: Mean values were significantly smaller in group A than in group B for interlabial gap, intervermilion distance, maxillary gingival display, maximum incisor exposure, and lower lip to incisor (P , .05). Conclusions: Significant differences were observed only in the vertical dimension, not in the transverse dimension. Five of the 12 objective diagnostic items were correlated with human judgments of the attractiveness of frontal posed smile in Japanese females after orthodontic treatment. (Angle Orthod. 2016;86:127-134.)

Esthetics and smile‐related characteristics assessed by laypersons

“…The minimum sample size for each subgroup (attractive vs. unattractive smile subgroups) was estimated to be 18 according to a previous study . Twenty‐two young Chinese adults (11 males and 11 females; 20–35 years of age) were recruited from the University as raters to assess and rate the sampled smile images.…”

“…The minimum sample size for each subgroup (attractive vs. unattractive smile subgroups) was estimated to be 18 according to a previous study. 17 Twenty-two young Chinese adults (11 males and 11 females; 20-35 years of age) were recruited from the University as raters to assess and rate the sampled smile images. Selection criteria for these raters included: native Han-nationality, no dental-or art-related educational background, and not engaged in dental health services or artrelated jobs.…”

“…The majority of these studies are survey‐based with laypersons evaluating a number of frontal smile photographs modified such that only one research parameter is changed at a time. Only a few studies have explored the influence of multiple factors simultaneously on laypersons' perception of frontal smile attractiveness . In addition, individual and cultural characteristics must be considered in smile evaluation as demographic, racial, ethnic, and cultural differences may play an important part in the perception of smile esthetics .…”

“…Only a few studies have explored the influence of multiple factors simultaneously on laypersons' perception of frontal smile attractiveness. 9,17,18 In addition, individual and cultural characteristics must be considered in smile evaluation as demographic, racial, ethnic, and cultural differences may play an important part in the perception of smile esthetics. [19][20][21] Investigation of the combination of multiple factors acting simultaneously on the perception of smile attractiveness in young Chinese laypersons is lacking in the published literature.…”

Patient response to the usage of orthodontic appliance in patients undergoing orthodontic treatment -A survey

“…Thus, the esthetic enhancement has become the growing reason for dental visits as it has a major role in social interactions. For an orthodontist to provide satisfactory smile corrections, knowledge of esthetics of the human face is necessary (Hata and Arai, 2016).…”