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Dobreva D, Gkantidis N, Halazonetis D, Verna C, Kanavakis G. Smile Reproducibility and Its Relationship to Self-Perceived Smile Attractiveness. BIOLOGY 2022; 11:biology11050719. [PMID: 35625447 PMCID: PMC9138875 DOI: 10.3390/biology11050719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/03/2022] [Revised: 05/04/2022] [Accepted: 05/05/2022] [Indexed: 11/16/2022]
Abstract
The reproducibility of facial expressions has been previously explored, however, there is no detailed information regarding the reproducibility of lip morphology forming a social smile. In this study, we recruited 93 young adults, aged 21−35 years old, who agreed to participate in two consecutive study visits four weeks apart. On each visit, they were asked to perform a social smile, which was captured on a 3D facial image acquired using the 3dMD camera system. Assessments of self-perceived smile attractiveness were also performed using a VAS scale. Lip morphology, including smile shape, was described using 62 landmarks and semi-landmarks. A Procrustes superimposition of each set of smiling configurations (first and second visit) was performed and the Euclidean distance between each landmark set was calculated. A linear regression model was used to test the association between smile consistency and self-perceived smile attractiveness. The results show that the average landmark distance between sessions did not exceed 1.5 mm, indicating high repeatability, and that females presented approximately 15% higher smile consistecy than males (p < 0.05). There was no statistically significant association between smile consistency and self-perceived smile attractiveness (η2 = 0.015; p = 0.252), when controlling for the effect of sex and age.
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Affiliation(s)
- Denitsa Dobreva
- Department of Pediatric Oral Health and Orthodontics, University Center for Dental Medicine UZB, University of Basel, Mattenstrasse 40, 4058 Basel, Switzerland; (D.D.); (C.V.)
| | - Nikolaos Gkantidis
- Department of Orthodontics and Dentofacial Orthopedics, University of Bern, 3001 Bern, Switzerland;
| | - Demetrios Halazonetis
- Department of Orthodontics, School of Dentistry, National and Kapodistrian University of Athens, GR-11527 Athens, Greece;
| | - Carlalberta Verna
- Department of Pediatric Oral Health and Orthodontics, University Center for Dental Medicine UZB, University of Basel, Mattenstrasse 40, 4058 Basel, Switzerland; (D.D.); (C.V.)
| | - Georgios Kanavakis
- Department of Pediatric Oral Health and Orthodontics, University Center for Dental Medicine UZB, University of Basel, Mattenstrasse 40, 4058 Basel, Switzerland; (D.D.); (C.V.)
- Department of Orthodontics, Tufts University School of Dental Medicine, Boston, MA 02111, USA
- Correspondence:
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Kimura N, Kim H, Okawachi T, Fuchigami T, Tezuka M, Kibe T, Amir MS, Inada E, Ishihata K, Nozoe E, Nakamura N. Pilot Study of Visual and Quantitative Image Analysis of Facial Surface Asymmetry in Unilateral Complete Cleft Lip and Palate. Cleft Palate Craniofac J 2018; 56:960-969. [DOI: 10.1177/1055665618819645] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Objective: To visualize and quantitatively analyze facial surface asymmetry following primary cleft lip repair in patients with unilateral cleft lip and palate (UCLP) and to compare this with noncleft controls. Design: Retrospective comparative study. Patients: Twenty-two patients with complete UCLP who underwent primary lip repair from 2009 to 2013 were enrolled in this study. The preserved 3-dimensional (3D) data of 23 healthy Japanese participants with the same age were used as controls. Interventions: All patients had received primary labioplasty in accordance with Cronin triangular flap method with orbicular oris muscle reconstruction. Main Outcome Measures: Shadow and zebra images established from moiré images, which were reconstructed from 3D facial data using stereophotogrammetry, were bisected and reversed by the symmetry axes (the middle line of the face). The discrepancies of the gravity and density between cleft and noncleft sides in 2 regions of interest, facial and lip areas, were then calculated and compared with those of healthy participants. Results: In the UCLP group, the mean discrepancies of gravity on shadow and zebra images were 1.76 ± 0.70 and 2.63 ± 1.72 pixels, respectively, in the facial area and 1.31 ± 0.36 and 3.83 ± 2.08 pixels, respectively, in the lip area. There was a significant difference in the mean discrepancies of gravity and density on zebra images in the lip area between the UCLP and control groups. Conclusions: Our image analysis of digital facial surface asymmetry in patients with UCLP provides visual and quantitative information, and it may contribute to improvements in muscle reconstruction on cleft lip repair.
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Affiliation(s)
- Namiko Kimura
- Department of Oral and Maxillofacial Surgery, Field of Maxillofacial Rehabilitation, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan
| | - Hyoungseop Kim
- Department of Mechanical and Control Engineering, Faculty of Engineering, Kyushu Institute of Technology, Kitakyushu, Japan
| | - Takako Okawachi
- Department of Oral and Maxillofacial Surgery, Field of Maxillofacial Rehabilitation, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan
| | - Takao Fuchigami
- Department of Oral and Maxillofacial Surgery, Kagoshima University Hospital, Kagoshima, Japan
| | - Masahiro Tezuka
- Department of Oral and Maxillofacial Surgery, Field of Maxillofacial Rehabilitation, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan
| | - Toshiro Kibe
- Department of Oral and Maxillofacial Surgery, Field of Maxillofacial Rehabilitation, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan
| | - Muhammad Subhan Amir
- Department of Oral and Maxillofacial Surgery, Field of Maxillofacial Rehabilitation, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan
- Department of Oral and Maxillofacial Surgery, Faculty of Dental Medicine, Airlangga University, Surabaya, Indonesia
| | - Emi Inada
- Department of Pediatric Dentistry, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan
| | - Kiyohide Ishihata
- Department of Oral and Maxillofacial Surgery, Kagoshima University Hospital, Kagoshima, Japan
| | - Etsuro Nozoe
- Department of Oral and Maxillofacial Surgery, Field of Maxillofacial Rehabilitation, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan
| | - Norifumi Nakamura
- Department of Oral and Maxillofacial Surgery, Field of Maxillofacial Rehabilitation, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan
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Grill FD, Ritschl LM, Dikel H, Rau A, Roth M, Eblenkamp M, Wolff KD, Loeffelbein DJ, Bauer FX. Facilitating CAD/CAM nasoalveolar molding therapy with a novel click-in system for nasal stents ensuring a quick and user-friendly chairside nasal stent exchange. Sci Rep 2018; 8:12084. [PMID: 30108232 PMCID: PMC6092331 DOI: 10.1038/s41598-018-29960-z] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Accepted: 07/17/2018] [Indexed: 11/20/2022] Open
Abstract
Nasoalveolar molding (NAM) aims to improve nasal symmetry with a nasal stent in cleft lip and palate (CLP) patients. When plates have to be exchanged because of dentoalveolar growth or cleft reduction, the nasal stent has to be mounted onto a new plate. This procedure elongates visiting hours for patients and parents or requires second treatment sessions. This study introduces a quick-lock additive manufacturing solution for chairside nasal stent exchange called RapidNAM. A novel taping retention pin has been designed that enables nasal stent insertion. Patients with unilateral CLP were included in this study. Plaster models were digitalized and measured by two independent observers. Two methods of CAD/CAM-molding therapies were compared: (i) conventional adhesion of a nasal stent (CAD/CAM NAM); (ii) quick-lock system in which the nasal stent was transferred to another plate (RapidNAM). CAD/CAM NAM and its refinement RapidNAM significantly increased the cleft-side nasal height and tilted the nose towards symmetry. The quick-lock system minimizes wire adaptations, since the pre-existing stent can be reused. The new nasal stent development seems a feasible solution to minimize visiting hours but with clinically satisfactory results. This new nasal stent system combines traditional elements of NAM with CAD/CAM-technology.
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Affiliation(s)
- Florian D Grill
- Department of Oral and Maxillofacial Surgery, Technische Universität München, München, Germany.
| | - Lucas M Ritschl
- Department of Oral and Maxillofacial Surgery, Technische Universität München, München, Germany
| | - Hannes Dikel
- Institute of Medical and Polymer Engineering, Technische Universität München, München, Germany
| | - Andrea Rau
- Department of Oral and Maxillofacial Surgery, Friedrich Alexander Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Maximilian Roth
- Department of Oral and Maxillofacial Surgery, Technische Universität München, München, Germany
| | - Markus Eblenkamp
- Institute of Medical and Polymer Engineering, Technische Universität München, München, Germany
| | - Klaus-Dietrich Wolff
- Department of Oral and Maxillofacial Surgery, Technische Universität München, München, Germany
| | - Denys J Loeffelbein
- Department of Oral and Maxillofacial Surgery, Technische Universität München, München, Germany.,Department of Oral and Maxillofacial Surgery, Helios Hospital Munich West, Teaching Hospital of Ludwig-Maximilians-Universiität, München, Germany
| | - Franz X Bauer
- Institute of Medical and Polymer Engineering, Technische Universität München, München, Germany
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Influence of involuntary facial expressions on reproducibility of 3D stereophotogrammetry in children with and without complete unilateral cleft lip and palate from 3 to 18 months of age. Clin Oral Investig 2018; 23:1041-1050. [DOI: 10.1007/s00784-018-2520-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Accepted: 06/06/2018] [Indexed: 11/26/2022]
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Secher JJ, Darvann TA, Pinholt EM. Accuracy and reproducibility of the DAVID SLS-2 scanner in three-dimensional facial imaging. J Craniomaxillofac Surg 2017; 45:1662-1670. [DOI: 10.1016/j.jcms.2017.07.006] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Revised: 06/15/2017] [Accepted: 07/18/2017] [Indexed: 12/01/2022] Open
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Three-dimensional facial analysis of Chinese children with repaired unilateral cleft lip and palate. Sci Rep 2016; 6:31335. [PMID: 27507713 PMCID: PMC4979089 DOI: 10.1038/srep31335] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Accepted: 07/18/2016] [Indexed: 01/12/2023] Open
Abstract
We analyzed the facial features of Chinese children with repaired unilateral cleft lip and palate (UCLP) and compared them with a normal control group using a three-dimensional (3D) stereophotogrammetry camera. This cross-sectional study examined 3D measurements of the facial surfaces of 20 Chinese children with repaired UCLP and 40 unaffected Chinese children aged 7 to 12 years old, which were captured using the VECTRA 3D five-pod photosystem and analyzed using Mirror software. Twenty-five variables and two ratios were compared between both groups using independent t-test. Intra- and inter-observer reliability was determined using ten randomly selected images and analyzed using intra-class correlation coefficient test (ICC). The level of significance was set at p < 0.0018. Intra- and inter-observers’ reliability was considered fair to excellent with an ICC value ranging from 0.54 to 0.99. Statistically significant differences (p < 0.0018) were found mainly in the nasolabial region. The cleft group exhibited wider alar base root width, flattened nose and broader nostril floor width on the cleft side. They tended to have shorter upper lip length and thinner upper vermillion thickness. Faces of Chinese children with repaired UCLP displayed meaningful differences when compared to the normal group especially in the nasolabial regions.
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Matthews H, Penington T, Saey I, Halliday J, Muggli E, Claes P. Spatially dense morphometrics of craniofacial sexual dimorphism in 1-year-olds. J Anat 2016; 229:549-59. [PMID: 27338586 DOI: 10.1111/joa.12507] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/12/2016] [Indexed: 01/28/2023] Open
Abstract
Recent advances in the field of geometric morphometrics allow for powerful statistical hypothesis testing for effects of biological and environmental variables on anatomical shape. This study used partial least-squares regression (PLSR) and the recently developed bootstrapped response-based imputation modelling (BRIM) algorithm to test for sexual dimorphism in the craniofacial shape of 1-year-old humans. We observed a recession of the forehead in boys relative to girls, and differences in the nose, consistent with adult dimorphism. Results also suggest that the degree to which individuals express dimorphic traits is continuous throughout the population. This is also seen in adult dimorphism but in 1-year-olds the amount of overlap between groups is much higher, indicating the strength of dimorphism between sexes is lower. Our results demonstrate early sexual dimorphism that is not attributable to the influx of sex hormones at puberty. This highlights the need to look at very early ontogeny for the origins of sexual dimorphism. We suggest that future work look at potential mediating effects of this early dimorphism on the later impact of puberty. The subtle shape differences we have detected, may also be applied to sexing fossilised crania. A common artefact in 3D images of faces of young children is that they often have their mouths open to varying degrees, introducing variability in the data unrelated to anatomy. We describe two PLSR-based methods of correcting this. These methods may facilitate surgical planning and assessment of young children based on 3D images.
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Affiliation(s)
- Harold Matthews
- Murdoch Childrens Research Institute, Melbourne, Victoria, Australia.,Royal Children's Hospital, Melbourne, Victoria, Australia.,Department of Paediatrics, University of Melbourne, Melbourne, Victoria, Australia
| | - Tony Penington
- Murdoch Childrens Research Institute, Melbourne, Victoria, Australia.,Royal Children's Hospital, Melbourne, Victoria, Australia.,Department of Paediatrics, University of Melbourne, Melbourne, Victoria, Australia
| | - Ine Saey
- Department of Electrical Engineering, KU Leuven, Leuven, Belgium.,ESAT/PSI, Medical Image Computing, UZ Leuven, Medical Imaging Research Center, Leuven, Belgium
| | - Jane Halliday
- Murdoch Childrens Research Institute, Melbourne, Victoria, Australia.,Department of Paediatrics, University of Melbourne, Melbourne, Victoria, Australia
| | - Evelyn Muggli
- Murdoch Childrens Research Institute, Melbourne, Victoria, Australia.,Department of Paediatrics, University of Melbourne, Melbourne, Victoria, Australia
| | - Peter Claes
- Murdoch Childrens Research Institute, Melbourne, Victoria, Australia.,Department of Electrical Engineering, KU Leuven, Leuven, Belgium.,ESAT/PSI, Medical Image Computing, UZ Leuven, Medical Imaging Research Center, Leuven, Belgium
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