Esthetic evaluation of dynamic smiles with attention to facial muscle activity

Lin, Angela I.Chun; Braun, Thomas; McNamara, James A.; Gerstner, Geoffrey E.

doi:10.1016/j.ajodo.2013.01.017

Cited by 18 publications

(13 citation statements)

References 19 publications

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“…This study evaluated the facial mimetic recovery after MTMT in patients with longstanding facial paralysis and is aimed to verify that a symmetric and spontaneous smile can be attained. The temporalis muscle is usually not activated during a smile . This study would like to investigate the behavior of the transferred temporalis muscle during smiling.…”

Section: Introductionmentioning

confidence: 99%

“…The temporalis muscle is usually not activated during a smile. 27 This study would like to investigate the behavior of the transferred temporalis muscle during smiling. For this purpose, the activity of the orbicularis oris, which is activated during a smile, on the not-treated side is also recorded to compare its activation timing in relation to the timing of activation of the transferred temporalis muscle.…”

Section: Introductionmentioning

confidence: 99%

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Assessment of functional outcomes of temporalis muscle transfers for patients with longstanding facial paralysis

et al. 2016

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Assessment of functional outcomes of temporalis muscle transfers for patients with longstanding facial paralysis

et al. 2016

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“…An ipsative response format, where the respondent is forced to make a choice from two or more options, has been used previously in this area (Lin et al, 2013, Barber et al, 2015. In psychological research the ipsative style has been used to avoid the potential for central tendency bias with a Likert response format, as respondents avoid the most extreme categories (Baron, 1996, Christiansen et al, 2005.…”

Section: Assessment Scalementioning

confidence: 99%

“…They have been found an acceptable alternative to paper-based surveys in psychological research (Buchanan and Smith, 1999). Several researchers have used web-based surveys to obtain data about smile aesthetics (Ker et al, 2008, Lin et al, 2013.…”

Section: Introductionmentioning

confidence: 99%

Space closing versus space opening for bilateral missing upper laterals – aesthetic judgments of laypeople: a web-based survey

Qadri¹,

Parkin

Benson³

2016

Journal of Orthodontics

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Objective: To investigate the opinions of laypeople regarding the aesthetic outcome of treating patients with developmental absence of both maxillary lateral incisors with either orthodontic space closure (OSC) or space opening and prosthetic replacement (PR). Design:Cross sectional, web-based survey.Methods: A panel of five orthodontists and five restorative dentists examined the post-treatment intra-oral images of 21 patients with developmental absence of both upper lateral incisors. A consensus view was obtained about the 10 most attractive images (5 OSC; 5 PR). The 10 selected images were used in a web-based survey involving staff and students at the University of Sheffield.In the first section the participants were asked to evaluate the attractiveness of the 10 randomly arranged single images using a 5-point Likert scale. In the second section an image of OSC was paired with an image of PR according to their attractiveness ranking by the clinician panel, and the participants were asked to indicate which of the two images they preferred. Results:The survey received 959 completed responses with 9590 judgements. The images of OSC were perceived to be more attractive (mean rating 3.34 out of 5; sd 0.56) compared with the images of PR (mean rating 3.14 out of 5; sd 0.58) (mean diff 0.21; P<0.001). Female and staff judges tended to give higher attractiveness ratings. Both females and males preferred the OSC images closing in 3 out of 4 paired images. Conclusion:Space closing was perceived to be more attractive than space opening by lay people.The findings have implications for advising patients about the best aesthetic outcome when both maxillary lateral incisors are missing.

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“…On the other hand, cross-sectionally there are positional changes in the nasal ala that vary 4.83 mm from the resting position, indicating the action of the muscles involved in smiling. In this sense, the smile assessed as attractive surrounds the contraction of the major zygomaticus muscle in combination with the orbicularis oculi (Lin et al, 2013), which may explain the significant increase in interalar distance of this area during the muscle action. Recent studies have indicated that the smile is a highly valuable component in the facial esthetic (Patusco et al, 2018) and this value is reduced when there is an increase in the width of the alar base; accordingly, the inclusion of different areas involved in the smile, such as lips, nose and eyes, renders the segmentation of subunits in these analyses complex, such that new studies must be conducted to assess the facial subunits and their effect on the smile and facial expression.…”

Section: Discussionmentioning

confidence: 99%

Three-dimensional Analysis of Nasolabial Soft Tissues While Smiling Using stereophotogrammetry (3dMDTM)

et al. 2019

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The nasolabial region is the central esthetic unit of the face and is considered one of the most important determinants of the facial esthetic. The facial morphometry of soft tissues is a very important tool in facial surgery. Advances have been made recently in the capture and analysis of 3D images, which offer great development potential in the diagnosis and treatment of facial deformities. The aim of this study was to characterize the nasolabial region of patient candidates for orthognathic surgery using 3D facial captures. A study was conducted to characterize the width of the nasal base and the nasolabial angle in adult patients through 3D photographs. 30 subjects were included, taking two 3D photos each, one in a resting position and the other smiling. The three-dimensional capture was done with the 3dMDface System. The measurements were taken with the 3dMD Vultus software. The length of the alar base was an average of 34.3 ± 2.6 mm at rest, and 39.1 ± 2.9 mm smiling. The mean of the nasolabial angle was 104.6 ± 9.6° at rest and 105.4 ± 14.3º smiling. Additionally, the distance of the alar base smiling compared to its distance at rest increased an average of 4.83 mm, whereas the nasolabial angle smiling increased an average of 0.8º compared to at rest. In this study, the nasolabial angle did not present any significant changes so that its assessments in the case of facial modifications can be standard; the width of the nasal base is significantly modified with the smile and thus a more intense study of any type of modification in this area is required.

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Esthetic evaluation of dynamic smiles with attention to facial muscle activity

Cited by 18 publications

References 19 publications

Assessment of functional outcomes of temporalis muscle transfers for patients with longstanding facial paralysis

Assessment of functional outcomes of temporalis muscle transfers for patients with longstanding facial paralysis

Space closing versus space opening for bilateral missing upper laterals – aesthetic judgments of laypeople: a web-based survey

Three-dimensional Analysis of Nasolabial Soft Tissues While Smiling Using stereophotogrammetry (3dMDTM)

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