The anatomy of a smile

Matthews, Teresa; Blatterfein, Louis; Morrow, Robert M.; Payne, S. Howard

doi:10.1016/s0022-3913(78)80008-0

Cited by 68 publications

(34 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The reason for increase in intercommissural width and commissure height with age could be due to the sagging at the corners of the mouth reported as a result of an increase in resting muscle length with age (levator anguli oris, zygomaticus minor, and zygomaticus major). 9,19,20 These results were consistent with the idea that activity and function of the muscles involved in smile decrease with age. Loss of skin elasticity and volume can also contribute to increased wrinkles at the corners of the lip, making it difficult to identify the commissures.…”

Section: Dynamics Of a Smile In Different Age Groupssupporting

confidence: 88%

Dynamics of a smile in different age groups

Chetan

Tandon

Singh

et al. 2012

The Angle Orthodontist

View full text Add to dashboard Cite

Objective: To evaluate smile in different age groups and to detect gender differences in smile. Materials and Methods: Digital videographic records of 241 randomly selected subjects were obtained for smile analysis. The subjects were divided into four groups by age (15-20 years, 21-30 years, 31-40 years, and 41-50 years). Each group was further subdivided by gender. After 41 subjects were excluded, the smile dimensions of 200 subjects were analyzed by two-way multivariate analysis of variance (MANOVA) with Duncan's multiple range post hoc test.

show abstract

Section: Dynamics Of a Smile In Different Age Groupssupporting

confidence: 88%

Dynamics of a smile in different age groups

Chetan

Tandon

Singh

et al. 2012

The Angle Orthodontist

View full text Add to dashboard Cite

show abstract

“…upward or downward direction at rest. The short upper lip usually causes incompetent lips that always curves upward, remains open and produces an acute angle at the corner of the mouth [2].…”

Section: Resultsmentioning

confidence: 99%

“…The smile is also a unique gesture to the human race, unlike the much similar species, the primates [2]. Not only does it represent the human race, a smile is more than a form of communication which influences personality and individual performance in jobs and daily activities.…”

Section: Introductionmentioning

confidence: 99%

The relationship between the lip length and smile line in a Malaysian population: A cross-sectional study

Al-Juboori¹,

Al-Juboori²,

Wen³

et al. 2017

Dent Oral Craniofac Res

View full text Add to dashboard Cite

Objective: Smile line is an inevitable element in esthetic dentistry, does the lip length have any correspondence to the smile line? Our study provides scientific data as part of an evidence-based assessment regarding the relationship between the upper lip length and smile line in a Malaysian population. Materials and methods:A randomized sample, consisting of 238 Malaysian aged between 18-35 years was used to carry out this study. Upon screening, the participant was asked to relax the lip and the lip length is recorded with a calibrated caliper. Measurement of the lip length was taken from subnasale to stomion superius. Smile line was then assessed by posed smile. All the data was taken in presence of at least 2 examiners to enable cross-checking of measurements. The ChiSquare test was then used to test the significance between both the variables. Results:The lip lengths obtained from the sample ranged from 18-29 mm with mean 22.7 mm and standard deviation of 2.53. Both males and females have majority of average smile line. The Indians and Malays have mostly average smile lines, however, the Chinese showed more of high smile lines. In this study, the chi-square statistic exceeded the conventionally accepted significance level of 0.05, where p-value = 0.265. In other words, there is no statistically significant increase in smile line with increased lip length.

show abstract

“…10,11,12 However, if the upper incisal margins are straight, the smile is called a straight smile, and if the incisal margins form a reverse curve, it is called a reverse smile. 13,14,15 During diagnosis and planning for treatment procedures, orthodontists should evaluate the facial hard and soft tissues in three dimensions, sagittal, vertical and transversal. A fourth dimension warranting evaluation is the time factor.…”

Section: Introductionmentioning

confidence: 99%

Age-related changes in the Brazilian woman’s smile

Correia

Reis²,

Conti

et al. 2016

Braz. oral res.

View full text Add to dashboard Cite

The aim of this research was to evaluate age-related changes in the smile of Brazilian women. The sample consisted of 249 Brazilian women who had not undergone previous orthodontic treatment or facial surgery. They were divided into four groups, according to age: G1 (20-29), G2 (30-39), G3 (40-49) and G4 (50 or older). Standardized front view photographs were taken while smiling and at rest. Measurements were evaluated by ANOVA and post-hoc Tukey. The Chi-square test was applied for qualitative variables. Upper lip thickness at rest and exposure of upper incisors on smiling decreased with age. Most individuals (60.9%) exhibited a medium smile. High smiles were more often seen in G1 (45%) and less frequently in G4 (18.8%), whereas the opposite occurred with the low smile, i.e., G4 (21.9%) and G1 (6.7%). Variations among the groups were observed in the transverse exposure of the teeth on smiling. In G1 and G3, there was a balance between tooth exposures, so that the teeth were exposed as far as the premolars and/or molars. Most of the women (56.3%) in G2 exposed their teeth as far as the first molars on smiling, whereas most of those (40.6%) in G4 exposed their teeth only as far as the first premolars on smiling. As age increased, there was decreased exposure of the upper incisors, decreased upper lip thickness and lower exposure of teeth vertically and transversely.

show abstract

The anatomy of a smile

Cited by 68 publications

References 4 publications

Dynamics of a smile in different age groups

Dynamics of a smile in different age groups

The relationship between the lip length and smile line in a Malaysian population: A cross-sectional study

Age-related changes in the Brazilian woman’s smile

Contact Info

Product

Resources

About