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Houlton TMR, Jooste N, Steyn M, Hemingway J. Visualising trends in dentition to lip mouth morphology using geometric morphometrics. PLoS One 2022; 17:e0274127. [PMID: 36054122 PMCID: PMC9439251 DOI: 10.1371/journal.pone.0274127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Accepted: 08/22/2022] [Indexed: 11/19/2022] Open
Abstract
Linear measurements taken from bony landmarks are often utilised in facial approximation (FA) to estimate and plan the placement of overlying soft tissue features. This process similarly guides craniofacial superimposition (CFS) practices. Knowledge of how hard and soft tissue features spatially relate around the mouth region is, however, limited. Geometric morphometric techniques have thus been used to investigate size and shape variation in dentition-to-lip mouth morphology in a South African population. Twenty landmarks (twelve dentition, eight lips) were digitised, using cone-beam CT images of the anterior craniofacial complex in a Frankfurt/Frankfort position, for 147 individuals aged between 20 and 75 years. Principal Component Analysis and Canonical Variate Analysis established that much shape variation exists. A two-way ANOVA identified significant (p < 0.0001) population and sex variation with mouth shape. Black individuals presented with thicker lips, with the oral fissure aligning closely to the dental occlusion. Oral fissure position for white individuals corresponded to the inferior one-quarter (females) or one-sixth (males) of the maxillary central incisor crowns. Males presented larger dimensions than females, but females had a greater lip-to-teeth height ratio than their male counterparts. A pooled within-group regression analysis assessed the effect of age on the dentition and lips and found that it had a significant (p < 0.0001) impact on mouth shape. Ageing was associated with a reduced lip and teeth height, increased mouth width, and a lowered oral fissure and cheilion placement. The generated mean shape data, with metric guides, offer a visual and numerical guide that builds on existing FA and CFS standards, enhancing our understanding of hard and soft tissue relationships.
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Affiliation(s)
- Tobias M. R. Houlton
- Centre for Anatomy and Human Identification, School of Science and Engineering, University of Dundee, Dundee, United Kingdom
- * E-mail:
| | - Nicolene Jooste
- Department of Human Anatomy and Physiology, University of Johannesburg, Doornfontein, Johannesburg, South Africa
| | - Maryna Steyn
- Human Variation and Identification Research Unit (HVIRU), School of Anatomical Sciences, University of the Witwatersrand, Medical School, Parktown, Johannesburg, South Africa
| | - Jason Hemingway
- Human Variation and Identification Research Unit (HVIRU), School of Anatomical Sciences, University of the Witwatersrand, Medical School, Parktown, Johannesburg, South Africa
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Cha MY, Hong YJ, Choi JE, Kwon TS, Kim IJ, Hong KW. Classification of early age facial growth pattern and identification of the genetic basis in two Korean populations. Sci Rep 2022; 12:13828. [PMID: 35970861 PMCID: PMC9378761 DOI: 10.1038/s41598-022-18127-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Accepted: 08/05/2022] [Indexed: 11/11/2022] Open
Abstract
Childhood to adolescence is an accelerated growth period, and genetic features can influence differences of individual growth patterns. In this study, we examined the genetic basis of early age facial growth (EAFG) patterns. Facial shape phenotypes were defined using facial landmark distances, identifying five growth patterns: continued-decrease, decrease-to-increase, constant, increase-to-decrease, and continued-increase. We conducted genome-wide association studies (GWAS) for 10 horizontal and 11 vertical phenotypes. The most significant association for horizontal phenotypes was rs610831 (TRIM29; β = 0.92, p-value = 1.9 × 10−9) and for vertical phenotypes was rs6898746 (ZSWIM6; β = 0.1103, p-value = 2.5 × 10−8). It is highly correlated with genes already reported for facial growth. This study is the first to classify and characterize facial growth patterns and related genetic polymorphisms.
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Affiliation(s)
- Mi-Yeon Cha
- Theragen Bio Co., Ltd., 240 Pangyoyeok-ro, Seongnam-si, Gyeonggi-do, 13493, Republic of Korea
| | - Yu-Jin Hong
- Center for Imaging Media Research, Korea Institute of Science and Technology, Seoul, 02792, Republic of Korea
| | - Ja-Eun Choi
- Theragen Bio Co., Ltd., 240 Pangyoyeok-ro, Seongnam-si, Gyeonggi-do, 13493, Republic of Korea
| | - Tae-Song Kwon
- Human ICT CO., Ltd., 111, Dogok-ro, Gangnam-gu, Seoul, 06253, Republic of Korea
| | - Ig-Jae Kim
- Center for Imaging Media Research, Korea Institute of Science and Technology, Seoul, 02792, Republic of Korea
| | - Kyung-Won Hong
- Theragen Bio Co., Ltd., 240 Pangyoyeok-ro, Seongnam-si, Gyeonggi-do, 13493, Republic of Korea.
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D'Ettorre G, Farronato M, Candida E, Quinzi V, Grippaudo C. A comparison between stereophotogrammetry and smartphone structured light technology for three-dimensional face scanning. Angle Orthod 2022; 92:358-363. [PMID: 35015071 DOI: 10.2319/040921-290.1] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Accepted: 11/01/2021] [Indexed: 11/23/2022] Open
Abstract
OBJECTIVES To compare three-dimensional facial scans obtained by stereophotogrammetry with two different applications for smartphone supporting the TrueDepth system, a structured light technology. MATERIALS AND METHODS Facial scans of 40 different subjects were acquired with three different systems. The 3dMDtrio Stereophotogrammetry System (3dMD, Atlanta, Ga) was compared with a smartphone (iPhone Xs; Apple, Cupertino, Calif) equipped with the Bellus3D Face Application (version 1.6.11; Bellus3D Inc, Campbell, Calif) or Capture (version 1.2.5; Standard Cyborg Inc, San Francisco, Calif). Times of image acquisition and elaboration were recorded. The surface-to-surface deviation and the distance between 18 landmarks from 3dMD reference images to those acquired with Bellus3D or Capture were measured. RESULTS Capturing and processing times with the smartphone applications were considerably longer than with the 3dMD system. The surface-to-surface deviation analysis between the Bellus3D and 3dMD showed an overlap percentage of 80.01% ± 5.92% and 56.62% ± 7.65% within the ranges of 1 mm and 0.5 mm discrepancy, respectively. Images from Capture showed an overlap percentage of 81.40% ± 9.59% and 56.45% ± 11.62% within the ranges of 1 mm and 0.5 mm, respectively. CONCLUSIONS The face image acquisition with the 3dMD device is fast and accurate, but bulky and expensive. The new smartphone applications combined with the TrueDepth sensors show promising results. They need more accuracy from the operator and more compliance from the patient because of the increased acquisition time. Their greatest advantages are related to cost and portability.
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Pośpiech E, Teisseyre P, Mielniczuk J, Branicki W. Predicting Physical Appearance from DNA Data-Towards Genomic Solutions. Genes (Basel) 2022; 13:genes13010121. [PMID: 35052461 PMCID: PMC8774670 DOI: 10.3390/genes13010121] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Revised: 01/03/2022] [Accepted: 01/04/2022] [Indexed: 02/04/2023] Open
Abstract
The idea of forensic DNA intelligence is to extract from genomic data any information that can help guide the investigation. The clues to the externally visible phenotype are of particular practical importance. The high heritability of the physical phenotype suggests that genetic data can be easily predicted, but this has only become possible with less polygenic traits. The forensic community has developed DNA-based predictive tools by employing a limited number of the most important markers analysed with targeted massive parallel sequencing. The complexity of the genetics of many other appearance phenotypes requires big data coupled with sophisticated machine learning methods to develop accurate genomic predictors. A significant challenge in developing universal genomic predictive methods will be the collection of sufficiently large data sets. These should be created using whole-genome sequencing technology to enable the identification of rare DNA variants implicated in phenotype determination. It is worth noting that the correctness of the forensic sketch generated from the DNA data depends on the inclusion of an age factor. This, however, can be predicted by analysing epigenetic data. An important limitation preventing whole-genome approaches from being commonly used in forensics is the slow progress in the development and implementation of high-throughput, low DNA input sequencing technologies. The example of palaeoanthropology suggests that such methods may possibly be developed in forensics.
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Affiliation(s)
- Ewelina Pośpiech
- Malopolska Centre of Biotechnology, Jagiellonian University, 30-387 Kraków, Poland;
| | - Paweł Teisseyre
- Institute of Computer Science, Polish Academy of Sciences, 01-248 Warsaw, Poland; (P.T.); (J.M.)
- Faculty of Mathematics and Information Science, Warsaw University of Technology, 00-662 Warsaw, Poland
| | - Jan Mielniczuk
- Institute of Computer Science, Polish Academy of Sciences, 01-248 Warsaw, Poland; (P.T.); (J.M.)
- Faculty of Mathematics and Information Science, Warsaw University of Technology, 00-662 Warsaw, Poland
| | - Wojciech Branicki
- Malopolska Centre of Biotechnology, Jagiellonian University, 30-387 Kraków, Poland;
- Central Forensic Laboratory of the Police, 00-583 Warsaw, Poland
- Correspondence: ; Tel.: +48-126-645-024
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Three-Dimensional Geometric Morphometry of Facial Soft Tissue Changes After Bilateral Sagittal Split Ramus Osteotomy. J Craniofac Surg 2021; 33:e92-e97. [PMID: 34879015 DOI: 10.1097/scs.0000000000008228] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
ABSTRACT This study aimed to evaluate the performance of geometric morphometry (GM) to assess the changes in facial soft tissue after orthognathic surgery. Subjects were 27 patients (skeletal class III) who underwent bilateral sagittal split ramus osteotomy and 27 volunteers as a control group. Computed tomography images of each patient were obtained before surgery (T0) and 6 months after surgery (T1). Computed tomography images of 27 volunteers (skeletal class I) were also obtained as a control group. Using a three-dimensional (3D) modeling software, 3D models were created and exported to a 3D surface analyzing software for geometric morphometry and principal component (PC) analysis. Significant differences in facial soft tissue were found in the first and second of 15 PC. The first PC represented variation in the lower facial height, and the second PC represented variation in the anterior-posterior position of the chin. Comparing the pre- and post-operative images, they illustrated that lower facial height was decreased, and the chin and lower lip moved posteriorly. Geometric morphometry showed to be a successful tool to isolate surgery-related changes from interindividual morphological variations.
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Richmond S, Zhurov AI, Ali ABM, Pirttiniemi P, Heikkinen T, Harila V, Silinevica S, Jakobsone G, Urtane I. Exploring the midline soft tissue surface changes from 12 to 15 years of age in three distinct country population cohorts. Eur J Orthod 2021; 42:517-524. [PMID: 31748803 DOI: 10.1093/ejo/cjz080] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
INTRODUCTION Several studies have highlighted differences in the facial features in a White European population. Genetics appear to have a major influence on normal facial variation, and environmental factors are likely to have minor influences on face shape directly or through epigenetic mechanisms. AIM The aim of this longitudinal cohort study is to determine the rate of change in midline facial landmarks in three distinct homogenous population groups (Finnish, Latvian, and Welsh) from 12.8 to 15.3 years of age. This age range covers the pubertal growth period for the majority of boys and girls. METHODS A cohort of children aged 12 were monitored for facial growth in three countries [Finland (n = 60), Latvia (n = 107), and Wales (n = 96)]. Three-dimensional facial surface images were acquired (using either laser or photogrammetric methods) at regular intervals (6-12 months) for 4 years. Ethical approval was granted in each country. Nine midline landmarks were identified and the relative spatial positions of these surface landmarks were measured relative to the mid-endocanthion (men) over a 4-year period. RESULTS This study reports the children who attended 95 per cent of all scanning sessions (Finland 48 out of 60; Latvia 104 out of 107; Wales 50 out of 96). Considerable facial variation is seen for all countries and sexes. There are clear patterns of growth that show different magnitudes at different age groups for the different country groups, sexes, and facial parameters. The greatest single yearly growth rate (5.4 mm) was seen for Welsh males for men-pogonion distance at 13.6 years of age. Males exhibit greater rates of growth compared to females. These variations in magnitude and timings are likely to be influenced by genetic ancestry as a result of population migration. CONCLUSION The midline points are a simple and valid method to assess the relative spatial positions of facial surface landmarks. This study confirms previous reports on the subtle differences in facial shapes and sizes of male and female children in different populations and also highlights the magnitudes and timings of growth for various midline landmark distances to the men point.
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Affiliation(s)
- Stephen Richmond
- Orthodontic Department, Applied Clinical Research and Public Health, School of Dentistry, College of Biomedical and Life Sciences, Heath Park, Cardiff, UK
| | - Alexei I Zhurov
- Orthodontic Department, Applied Clinical Research and Public Health, School of Dentistry, College of Biomedical and Life Sciences, Heath Park, Cardiff, UK
| | - Azrul Bin Mohd Ali
- Orthodontic Department, Applied Clinical Research and Public Health, School of Dentistry, College of Biomedical and Life Sciences, Heath Park, Cardiff, UK
| | - Pertti Pirttiniemi
- Oral Development and Orthodontics, Faculty of Medicine, University of Oulu, Oulu, Finland
| | - Tuomo Heikkinen
- Oral Development and Orthodontics, Faculty of Medicine, University of Oulu, Oulu, Finland
| | - Virpi Harila
- Oral Development and Orthodontics, Faculty of Medicine, University of Oulu, Oulu, Finland
| | - Signe Silinevica
- Orthodontic Department, RSU Institute of Stomatology, Rīga, Latvia
| | | | - Ilga Urtane
- Orthodontic Department, RSU Institute of Stomatology, Rīga, Latvia
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Kočandrlová K, Dupej J, Hoffmannová E, Velemínská J. Three-dimensional mixed longitudinal study of facial growth changes and variability of facial form in preschool children using stereophotogrammetry. Orthod Craniofac Res 2020; 24:511-519. [PMID: 33345464 DOI: 10.1111/ocr.12461] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Revised: 12/07/2020] [Accepted: 12/16/2020] [Indexed: 01/17/2023]
Abstract
OBJECTIVES Since the normal, non-pathological facial growth in preschool children is not sufficiently reported, the aim was to follow growth changes of facial surface, sex differences and facial variability in preschool children using 3D stereophotogrammetry. SETTINGS AND SAMPLE POPULATION Mixed longitudinal sample of healthy Caucasian preschool children without head and facial trauma or craniofacial anomalies from 3.4 to 6.7 years of age consisted of 25 girls and 17 boys. MATERIALS AND METHODS 136 3D facial models from optical scanner Vectra 3D were evaluated by geometric morphometrics (CPC-DCA, PCA, per-vertex t test). RESULTS In both sexes, the lower face was widened and elongated, and the prominences of the superciliary arches, lower orbital region, nose, lips and chin increased. Facial surface increments were more even in girls with a maximum between the fourth and fifth year of age, while in boys, there was the most intensive growth between fifth and sixth year of age. Sexual dimorphism was very stable during investigated period, only less statistically significant at the age of 3 years. Boys had more prominent lateral lower part of forehead, nose and lips than girls in every age category. CONCLUSIONS The longitudinal growth of the face between third and sixth year of age was similar in both sexes, facial sex differences were found in terms of intensity, size and timing. Variability of facial form showed that boys' faces were larger on average and facial shape did not differ. The knowledge of facial growth is essential for diagnostics and clinical practice.
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Affiliation(s)
- Karolina Kočandrlová
- Faculty of Science, Department of Anthropology and Human Genetics, Charles University, Prague 2, Czech Republic
| | - Ján Dupej
- Faculty of Science, Department of Anthropology and Human Genetics, Charles University, Prague 2, Czech Republic.,Faculty of Mathematics and Physics, Department of Software and Computer Science Education, Charles University, Prague 1, Czech Republic
| | - Eva Hoffmannová
- Faculty of Science, Department of Anthropology and Human Genetics, Charles University, Prague 2, Czech Republic
| | - Jana Velemínská
- Faculty of Science, Department of Anthropology and Human Genetics, Charles University, Prague 2, Czech Republic
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Galloway J, Farnell DJ, Richmond S, Zhurov AI. Multilevel Analysis of the Influence of Maternal Smoking and Alcohol Consumption on the Facial Shape of English Adolescents. J Imaging 2020; 6:34. [PMID: 34460736 PMCID: PMC8321032 DOI: 10.3390/jimaging6050034] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Revised: 05/10/2020] [Accepted: 05/15/2020] [Indexed: 12/01/2022] Open
Abstract
This cross-sectional study aims to assess the influence of maternal smoking and alcohol consumption during pregnancy on the facial shape of non-syndromic English adolescents and demonstrate the potential benefits of using multilevel principal component analysis (mPCA). A cohort of 3755 non-syndromic 15-year-olds from the Avon Longitudinal Study of Parents and Children (ALSPAC), England, were included. Maternal smoking and alcohol consumption during the 1st and 2nd trimesters of pregnancy were determined via questionnaire at 18 weeks gestation. 21 facial landmarks, used as a proxy for the main facial features, were manually plotted onto 3D facial scans of the participants. The effect of maternal smoking and maternal alcohol consumption (average 1-2 glasses per week) was minimal, with 0.66% and 0.48% of the variation in the 21 landmarks of non-syndromic offspring explained, respectively. This study provides a further example of mPCA being used effectively as a descriptive analysis in facial shape research. This is the first example of mPCA being extended to four levels to assess the influence of environmental factors. Further work on the influence of high/low levels of smoking and alcohol and providing inferential evidence is required.
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Affiliation(s)
- Jennifer Galloway
- School of Dentistry, Cardiff University, Heath Park, Cardiff CF14 4XY, UK; (D.J.J.F.); (S.R.); (A.I.Z.)
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Abbas HH, Hicks Y, Zhurov A, Marshall D, Claes P, Wilson-Nagrani C, Richmond S. An automatic approach for classification and categorisation of lip morphological traits. PLoS One 2019; 14:e0221197. [PMID: 31661502 PMCID: PMC6818784 DOI: 10.1371/journal.pone.0221197] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Accepted: 08/01/2019] [Indexed: 12/25/2022] Open
Abstract
Classification of facial traits (e.g., lip shape) is an important area of medical research, for example, in determining associations between lip traits and genetic variants which may lead to a cleft lip. In clinical situations, classification of facial traits is usually performed subjectively directly on the individual or recorded later from a three-dimensional image, which is time consuming and prone to operator errors. The present study proposes, for the first time, an automatic approach for the classification and categorisation of lip area traits. Our approach uses novel three-dimensional geometric features based on surface curvatures measured along geodesic paths between anthropometric landmarks. Different combinations of geodesic features are analysed and compared. The effect of automatically identified categories on the face is visualised using a partial least squares method. The method was applied to the classification and categorisation of six lip shape traits (philtrum, Cupid’s bow, lip contours, lip-chin, and lower lip tone) in a large sample of 4747 faces of normal British Western European descents. The proposed method demonstrates correct automatic classification rate of up to 90%.
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Affiliation(s)
- Hawraa H. Abbas
- School of Engineering, Kerbala University, Kerbala, Iraq
- School of Engineering, Cardiff University, Cardiff, Wales, United Kingdom
- * E-mail: (HHA); (YH)
| | - Yulia Hicks
- School of Engineering, Cardiff University, Cardiff, Wales, United Kingdom
- * E-mail: (HHA); (YH)
| | - Alexei Zhurov
- School of Dentistry, Cardiff University, Cardiff, Wales, United Kingdom
| | - David Marshall
- School of Computer Science and Informatics, Cardiff University, Cardiff, Wales, United Kingdom
| | - Peter Claes
- Medical Imaging Research Center, University of Leuven, Leuven, Belgium
| | | | - Stephen Richmond
- School of Dentistry, Cardiff University, Cardiff, Wales, United Kingdom
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Čelar A, Gahleitner A, Lettner S, Freudenthaler J. Estimated functional space of centric condyle positions in temporomandibular joints of asymptomatic individuals using MRI. Sci Rep 2019; 9:15599. [PMID: 31666649 PMCID: PMC6821742 DOI: 10.1038/s41598-019-52081-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Accepted: 10/10/2019] [Indexed: 02/08/2023] Open
Abstract
Magnetic resonance imaging (MRI) studies on centric condyle positions lack 3D comparisons of guided and unguided methods, which are used for accomplishing centric relation reference positions. The purpose of this study was to describe the space, in which mandibular condyles are placed in vivo by dental intercuspation, Dawson’s bimanual manipulation, and neuromuscular position. Twenty asymptomatic individuals aged 23 to 37 years underwent separate bite registrations using bimanual manipulation and the unguided neuromuscular technique. Subsequent 3-Tesla MRI scans of both temporomandibular joints yielded 3D data of the most superior condylar points at maximum intercuspation and both centric relation positions. We found concentric condyle positions in maximum intercuspation but considerable variation of condyle position after bimanual manipulation and neuromuscular technique. Their 95% predictive confidence ellipses overlapped substantially and created a space of reference positions. Its smallest volume averaged 2 mm3 for a minimal convex hull (95% confidence interval 1.1–3.2) and 3.5 mm3 for a minimal ellipsoid hull (95% confidence interval 1.8–5.4). Visualized in vivo by MRI, condyle positions at bimanual manipulation and neuromuscular position were not predictable and showed substantial variation in asymptomatic subjects. Clinicians should be aware of the functional space and its effect on dental intercuspation.
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Affiliation(s)
- Aleš Čelar
- Medical University of Vienna, University Clinic of Dentistry, Sensengasse 2a, 1090, Wien, Austria.
| | - André Gahleitner
- Medical University of Vienna, University Clinic of Dentistry, Sensengasse 2a, 1090, Wien, Austria
| | - Stefan Lettner
- Medical University of Vienna, University Clinic of Dentistry, Sensengasse 2a, 1090, Wien, Austria
| | - Josef Freudenthaler
- Medical University of Vienna, University Clinic of Dentistry, Sensengasse 2a, 1090, Wien, Austria
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Wen YF, Wong HM, McGrath CP. Developmental shape changes in facial morphology: Geometric morphometric analyses based on a prospective, population-based, Chinese cohort in Hong Kong. PLoS One 2019; 14:e0218542. [PMID: 31252428 PMCID: PMC6599092 DOI: 10.1371/journal.pone.0218542] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Accepted: 06/04/2019] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Thorough understanding of developmental changes of human facial shape is lacking. The present study aimed to evaluate developmental shape changes of facial morphology based on a prospective, population-representative, Chinese cohort in Hong Kong. METHODS A population-representative sample of Chinese in Hong Kong was followed. Serial facial images of over 260 participants were obtained at age 12, 15, and 18 years. Facial landmarks were digitized and the corresponding coordinates were submitted for Generalized Procrustes Analysis. The resultant Procrustes shape coordinates, which captured shape information encoded by the facial landmarks, were then used for statistical shape analyses. RESULTS Small but significant developmental changes in mean facial shape were observed (p < 0.0001 for all pairwise comparisons). Significant age-related changes in the magnitude of variance of facial shape were also observed (p < 0.05). Phenotypic growth trajectories representing developmental shape changes were similar in size (p > 0.05) between sexes but differed in direction (p < 0.05) in shape space and trajectory shape (p < 0.05). The magnitude of shape differences between sexes remained constant from 12 to 18 years. Results of frontal facial shape analyses after removing the effect of allometry were similar to results obtained before removal of allometry. For lateral facial configurations, allometric trajectories among the age-by-sex groups were similar in slope (p > 0.05) but varied in directions in the multidimensional shape space. CONCLUSIONS Our findings suggested significant age-related changes in facial shape and provided a dynamic view of developmental changes in sexual dimorphism of facial shape. Allometry contributed minimally to developmental changes in frontal facial shape. In addition, the allometric trajectories for lateral facial configurations were similar in rate of shape change but differed in their directions in shape space.
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Affiliation(s)
- Yi Feng Wen
- Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi’an Jiaotong University, Xi’an, China
- Clinical Research Center of Shaanxi Province for Dental and Maxillofacial Diseases, College of Stomatology, Xi’an Jiaotong University, Xi’an, China
| | - Hai Ming Wong
- Paediatric Dentistry, Faculty of Dentistry, The University of Hong Kong, Hong Kong, China
- * E-mail:
| | - Colman P. McGrath
- Dental Public Health, Faculty of Dentistry, The University of Hong Kong, Hong Kong, China
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Imai T, Okami K. Facial cues to age perception using three-dimensional analysis. PLoS One 2019; 14:e0209639. [PMID: 30759092 PMCID: PMC6373935 DOI: 10.1371/journal.pone.0209639] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Accepted: 12/10/2018] [Indexed: 11/19/2022] Open
Abstract
To clarify cues for age perception, the three-dimensional head and face forms of Japanese women were analyzed. It is known that age-related transformations are mainly caused by changes in soft tissue during adulthood. A homologous polygon model was created by fitting template meshes to each study participant to obtain three-dimensional data for analyzing whole head and face forms. Using principal component analysis of the vertices coordinates of these models, 26 principal components were extracted (contribution ratios >0.5%), which accounted for more than 90% of the total variance. Among the principal components, five had a significant correlation with the perceived ages of the participants (p < 0.05). Transformations with these principal components in the age-related direction produced aged faces. Moreover, the older the perceived age, the larger the ratio of age-manifesting participants, namely participants who had one or more age-related principal component score greater than +1.0 σ in the age-related direction. Therefore, these five principal components were regarded as aging factors. A cluster analysis of the five aging factors revealed that all of the participants fell into one of four groups, meaning that specific combinations of factors could be used as cues for age perception in each group. These results suggest that Japanese women can be classified into four groups according to age-related transformations of soft tissue in the face.
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Affiliation(s)
- Takeo Imai
- Skin Care Laboratory, Kao Corporation, Odawara, Kanagawa, Japan
- * E-mail:
| | - Kyoko Okami
- Skin Care Laboratory, Kao Corporation, Odawara, Kanagawa, Japan
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Richmond S, Howe LJ, Lewis S, Stergiakouli E, Zhurov A. Facial Genetics: A Brief Overview. Front Genet 2018; 9:462. [PMID: 30386375 PMCID: PMC6198798 DOI: 10.3389/fgene.2018.00462] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Accepted: 09/20/2018] [Indexed: 12/20/2022] Open
Abstract
Historically, craniofacial genetic research has understandably focused on identifying the causes of craniofacial anomalies and it has only been within the last 10 years, that there has been a drive to detail the biological basis of normal-range facial variation. This initiative has been facilitated by the availability of low-cost hi-resolution three-dimensional systems which have the ability to capture the facial details of thousands of individuals quickly and accurately. Simultaneous advances in genotyping technology have enabled the exploration of genetic influences on facial phenotypes, both in the present day and across human history. There are several important reasons for exploring the genetics of normal-range variation in facial morphology. - Disentangling the environmental factors and relative parental biological contributions to heritable traits can help to answer the age-old question "why we look the way that we do?" - Understanding the etiology of craniofacial anomalies; e.g., unaffected family members of individuals with non-syndromic cleft lip/palate (nsCL/P) have been shown to differ in terms of normal-range facial variation to the general population suggesting an etiological link between facial morphology and nsCL/P. - Many factors such as ancestry, sex, eye/hair color as well as distinctive facial features (such as, shape of the chin, cheeks, eyes, forehead, lips, and nose) can be identified or estimated using an individual's genetic data, with potential applications in healthcare and forensics. - Improved understanding of historical selection and adaptation relating to facial phenotypes, for example, skin pigmentation and geographical latitude. - Highlighting what is known about shared facial traits, medical conditions and genes.
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Affiliation(s)
- Stephen Richmond
- Applied Clinical Research and Public Health, School of Dentistry, College of Biomedical and Life Sciences, Cardiff University, Cardiff, United Kingdom
| | - Laurence J. Howe
- MRC Integrative Epidemiology Unit, Population Health Sciences, University of Bristol, Bristol, United Kingdom
- Institute of Cardiovascular Science, University College London, London, United Kingdom
| | - Sarah Lewis
- MRC Integrative Epidemiology Unit, Population Health Sciences, University of Bristol, Bristol, United Kingdom
- School of Oral and Dental Sciences, University of Bristol, Bristol, United Kingdom
| | - Evie Stergiakouli
- MRC Integrative Epidemiology Unit, Population Health Sciences, University of Bristol, Bristol, United Kingdom
- School of Oral and Dental Sciences, University of Bristol, Bristol, United Kingdom
| | - Alexei Zhurov
- Applied Clinical Research and Public Health, School of Dentistry, College of Biomedical and Life Sciences, Cardiff University, Cardiff, United Kingdom
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Cha S, Lim JE, Park AY, Do JH, Lee SW, Shin C, Cho NH, Kang JO, Nam JM, Kim JS, Woo KM, Lee SH, Kim JY, Oh B. Identification of five novel genetic loci related to facial morphology by genome-wide association studies. BMC Genomics 2018; 19:481. [PMID: 29921221 PMCID: PMC6008943 DOI: 10.1186/s12864-018-4865-9] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2017] [Accepted: 06/12/2018] [Indexed: 01/31/2023] Open
Abstract
BACKGROUND Face morphology is strongly determined by genetic factors. However, only a small number of genes related to face morphology have been identified to date. Here, we performed a two-stage genome-wide association study (GWAS) of 85 face morphological traits in 7569 Koreans (5643 in the discovery set and 1926 in the replication set). RESULTS In this study, we analyzed 85 facial traits, including facial angles. After discovery GWAS, 128 single nucleotide polymorphisms (SNPs) showing an association of P < 5 × 10- 6 were selected to determine the replication of the associations, and meta-analysis of discovery GWAS and the replication analysis resulted in five genome-wide significant loci. The OSR1-WDR35 [rs7567283, G allele, beta (se) = -0.536 (0.096), P = 2.75 × 10- 8] locus was associated with the facial frontal contour; the HOXD1-MTX2 [rs970797, A allele, beta (se) = 0.015 (0.003), P = 3.97 × 10- 9] and WDR27 [rs3736712, C allele, beta (se) = 0.293 (0.048), P = 8.44 × 10- 10] loci were associated with eye shape; and the SOX9 [rs2193054, C allele, beta (se) (ln-transformed) = -0.007 (0.001), P = 6.17 × 10- 17] and DHX35 [rs2206437, A allele, beta (se) = -0.283 (0.047), P = 1.61 × 10- 9] loci were associated with nose shape. WDR35 and SOX9 were related to known craniofacial malformations, i.e., cranioectodermal dysplasia 2 and campomelic dysplasia, respectively. In addition, we found three independent association signals in the SOX9 locus, and six known loci for nose size and shape were replicated in this study population. Interestingly, four SNPs within these five face morphology-related loci showed discrepancies in allele frequencies among ethnic groups. CONCLUSIONS We identified five novel face morphology loci that were associated with facial frontal contour, nose shape, and eye shape. Our findings provide useful genetic information for the determination of face morphology.
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Affiliation(s)
- Seongwon Cha
- Future Medicine Division, Korea Institute of Oriental Medicine, Daejeon, 34054, Republic of Korea
| | - Ji Eun Lim
- Department of Biochemistry and Molecular Biology, School of Medicine, Kyung Hee University, Seoul, 02447, Republic of Korea
| | - Ah Yeon Park
- Mibyeong Research Center, Korea Institute of Oriental Medicine, Daejeon, 34054, Republic of Korea
| | - Jun-Hyeong Do
- Future Medicine Division, Korea Institute of Oriental Medicine, Daejeon, 34054, Republic of Korea
| | - Si Woo Lee
- Future Medicine Division, Korea Institute of Oriental Medicine, Daejeon, 34054, Republic of Korea
| | - Chol Shin
- Division of Pulmonary Sleep and Critical Care Medicine, Department of Internal Medicine, Korea University Ansan Hospital and Institute of Human Genomic Study, Korea University Ansan Hospital, Ansan, 15355, Republic of Korea
| | - Nam Han Cho
- Department of Preventive Medicine, Ajou University School of Medicine, Suwon, 16499, Republic of Korea
| | - Ji-One Kang
- Department of Biochemistry and Molecular Biology, School of Medicine, Kyung Hee University, Seoul, 02447, Republic of Korea
| | - Jeong Min Nam
- Department of Biochemistry and Molecular Biology, School of Medicine, Kyung Hee University, Seoul, 02447, Republic of Korea
| | - Jong-Sik Kim
- DNA Forensic Division, Supreme Prosecutors' Office, Seoul, 06590, Republic of Korea
| | - Kwang-Man Woo
- DNA Forensic Division, Supreme Prosecutors' Office, Seoul, 06590, Republic of Korea
| | - Seung-Hwan Lee
- DNA Forensic Division, Supreme Prosecutors' Office, Seoul, 06590, Republic of Korea
| | - Jong Yeol Kim
- KM Fundamental Research Division, Korea Institute of Oriental Medicine, Daejeon, 34054, Republic of Korea
| | - Bermseok Oh
- Department of Biochemistry and Molecular Biology, School of Medicine, Kyung Hee University, Seoul, 02447, Republic of Korea.
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15
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Djordjevic J, Zhurov AI, Richmond S. Genetic and Environmental Contributions to Facial Morphological Variation: A 3D Population-Based Twin Study. PLoS One 2016; 11:e0162250. [PMID: 27584156 PMCID: PMC5008732 DOI: 10.1371/journal.pone.0162250] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2016] [Accepted: 08/21/2016] [Indexed: 01/01/2023] Open
Abstract
INTRODUCTION Facial phenotype is influenced by genes and environment; however, little is known about their relative contributions to normal facial morphology. The aim of this study was to assess the relative genetic and environmental contributions to facial morphological variation using a three-dimensional (3D) population-based approach and the classical twin study design. MATERIALS AND METHODS 3D facial images of 1380 female twins from the TwinsUK Registry database were used. All faces were landmarked, by manually placing 37 landmark points, and Procrustes registered. Three groups of traits were extracted and analysed: 19 principal components (uPC) and 23 principal components (sPC), derived from the unscaled and scaled landmark configurations respectively, and 1275 linear distances measured between 51 landmarks (37 manually identified and 14 automatically calculated). The intraclass correlation coefficients, rMZ and rDZ, broad-sense heritability (h2), common (c2) and unique (e2) environment contributions were calculated for all traits for the monozygotic (MZ) and dizygotic (DZ) twins. RESULTS Heritability of 13 uPC and 17 sPC reached statistical significance, with h2 ranging from 38.8% to 78.5% in the former and 30.5% to 84.8% in the latter group. Also, 1222 distances showed evidence of genetic control. Common environment contributed to one PC in both groups and 53 linear distances (4.3%). Unique environment contributed to 17 uPC and 20 sPC and 1245 distances. CONCLUSIONS Genetic factors can explain more than 70% of the phenotypic facial variation in facial size, nose (width, prominence and height), lips prominence and inter-ocular distance. A few traits have shown potential dominant genetic influence: the prominence and height of the nose, the lower lip prominence in relation to the chin and upper lip philtrum length. Environmental contribution to facial variation seems to be the greatest for the mandibular ramus height and horizontal facial asymmetry.
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Affiliation(s)
- Jelena Djordjevic
- Department of Applied Clinical Research and Public Health, School of Dentistry, Cardiff, United Kingdom
- * E-mail:
| | - Alexei I. Zhurov
- Department of Applied Clinical Research and Public Health, School of Dentistry, Cardiff, United Kingdom
| | - Stephen Richmond
- Department of Applied Clinical Research and Public Health, School of Dentistry, Cardiff, United Kingdom
| | - Visigen Consortium
- Department of Applied Clinical Research and Public Health, School of Dentistry, Cardiff, United Kingdom
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Kesterke MJ, Raffensperger ZD, Heike CL, Cunningham ML, Hecht JT, Kau CH, Nidey NL, Moreno LM, Wehby GL, Marazita ML, Weinberg SM. Using the 3D Facial Norms Database to investigate craniofacial sexual dimorphism in healthy children, adolescents, and adults. Biol Sex Differ 2016; 7:23. [PMID: 27110347 PMCID: PMC4841054 DOI: 10.1186/s13293-016-0076-8] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Accepted: 04/17/2016] [Indexed: 12/04/2022] Open
Abstract
Background Although craniofacial sex differences have been extensively studied in humans, relatively little is known about when various dimorphic features manifest during postnatal life. Using cross-sectional data derived from the 3D Facial Norms data repository, we tested for sexual dimorphism of craniofacial soft-tissue morphology at different ages. Methods One thousand five hundred fifty-five individuals, pre-screened for craniofacial conditions, between 3 and 25 years of age were placed in to one of six age-defined categories: early childhood, late childhood, puberty, adolescence, young adult, and adult. At each age group, sex differences were tested by ANCOVA for 29 traditional soft-tissue anthropometric measurements collected from 3D facial scans. Additionally, sex differences in shape were tested using a geometric morphometric analysis of 24 3D facial landmarks. Results Significant (p < 0.05) sex differences were observed in every age group for measurements covering multiple aspects of the craniofacial complex. The magnitude of the dimorphism generally increased with age, with large spikes in the nasal, cranial, and facial measurements observed after puberty. Significant facial shape differences (p < 0.05) were also seen at each age, with some dimorphic features already present in young children (eye fissure inclination) and others emerging only after puberty (mandibular position). Conclusions Several craniofacial soft-tissue sex differences were already present in the youngest age group studied, indicating that these differences emerged prior to 3 years of age. The results paint a complex and heterogeneous picture, with different groups of traits exhibiting distinct patterns of dimorphism during ontogeny. The definitive adult male and female facial shape was present following puberty, but arose from numerous distinct changes taking place at earlier stages. Electronic supplementary material The online version of this article (doi:10.1186/s13293-016-0076-8) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Matthew J Kesterke
- Department of Anthropology, University of Pittsburgh, Pittsburgh, PA USA
| | - Zachary D Raffensperger
- Center for Craniofacial and Dental Genetics, Department of Oral Biology, University of Pittsburgh, 100 Technology Drive, Suite 500, Pittsburgh, PA 15219 USA
| | - Carrie L Heike
- Department of Pediatrics, University of Washington, Seattle, WA USA
| | - Michael L Cunningham
- Department of Pediatrics, University of Washington, Seattle, WA USA ; Department of Biological Structure, University of Washington, Seattle, WA USA ; Department of Oral Biology, University of Washington, Seattle, WA USA ; Department of Pediatric Dentistry, University of Washington, Seattle, WA USA
| | - Jacqueline T Hecht
- Department of Pediatrics, University of Texas Health Science Center, Houston, TX USA
| | - Chung How Kau
- Department of Orthodontics, University of Alabama, Birmingham, AL USA
| | - Nichole L Nidey
- Department of Pediatrics, University of Iowa, Iowa City, IA USA
| | - Lina M Moreno
- Department of Orthodontics, University of Iowa, Iowa City, IA USA ; Dows Institute for Dental Research, University of Iowa, Iowa City, IA USA
| | - George L Wehby
- Department of Health Management and Policy, University of Iowa, Iowa City, IA USA
| | - Mary L Marazita
- Center for Craniofacial and Dental Genetics, Department of Oral Biology, University of Pittsburgh, 100 Technology Drive, Suite 500, Pittsburgh, PA 15219 USA ; Department of Human Genetics, University of Pittsburgh, Pittsburgh, PA USA ; Clinical and Translational Science Institute, University of Pittsburgh, Pittsburgh, PA USA ; Department of Psychiatry, University of Pittsburgh, Pittsburgh, PA USA
| | - Seth M Weinberg
- Department of Anthropology, University of Pittsburgh, Pittsburgh, PA USA ; Center for Craniofacial and Dental Genetics, Department of Oral Biology, University of Pittsburgh, 100 Technology Drive, Suite 500, Pittsburgh, PA 15219 USA
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Weinberg SM, Raffensperger ZD, Kesterke MJ, Heike CL, Cunningham ML, Hecht JT, Kau CH, Murray JC, Wehby GL, Moreno LM, Marazita ML. The 3D Facial Norms Database: Part 1. A Web-Based Craniofacial Anthropometric and Image Repository for the Clinical and Research Community. Cleft Palate Craniofac J 2015; 53:e185-e197. [PMID: 26492185 DOI: 10.1597/15-199] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
With the current widespread use of three-dimensional (3D) facial surface imaging in clinical and research environments, there is a growing demand for high-quality craniofacial norms based on 3D imaging technology. The principal goal of the 3D Facial Norms (3DFN) project was to create an interactive, Web-based repository of 3D facial images and measurements. Unlike other repositories, users can gain access to both summary-level statistics and individual-level data, including 3D facial landmark coordinates, 3D-derived anthropometric measurements, 3D facial surface images, and genotypes from every individual in the dataset. The 3DFN database currently consists of 2454 male and female participants ranging in age from 3 to 40 years. The subjects were recruited at four US sites and screened for a history of craniofacial conditions. The goal of this article is to introduce readers to the 3DFN repository by providing a general overview of the project, explaining the rationale behind the creation of the database, and describing the methods used to collect the data. Sex- and age-specific summary statistics (means and standard deviations) and growth curves for every anthropometric measurement in the 3DFN dataset are provided as a supplement available online. These summary statistics and growth curves can aid clinicians in the assessment of craniofacial dysmorphology.
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18
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Al Ali A, Richmond S, Popat H, Playle R, Pickles T, Zhurov AI, Marshall D, Rosin PL, Henderson J, Bonuck K. The influence of snoring, mouth breathing and apnoea on facial morphology in late childhood: a three-dimensional study. BMJ Open 2015; 5:e009027. [PMID: 26351193 PMCID: PMC4563226 DOI: 10.1136/bmjopen-2015-009027] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/10/2015] [Accepted: 06/17/2015] [Indexed: 11/06/2022] Open
Abstract
OBJECTIVE To explore the relationship between the prevalence of sleep disordered breathing (SDB) and face shape morphology in a large cohort of 15-year-old children. DESIGN Observational longitudinal cohort study SETTING Avon Longitudinal Study of Parents and Children (ALSPAC), South West of England. PARTICIPANTS Three-dimensional surface laser scans were taken for 4784 white British children from the ALSPAC during a follow-up clinic. A total of 1724 children with sleep disordered breathing (SDB) and 1862 healthy children were identified via parents' report of sleep disordered symptoms for their children. We excluded from the original cohort all children identified as having congenital abnormalities, diagnoses associated with poor growth and children with adenoidectomy and/or tonsillectomy. MAIN OUTCOME MEASURES Parents in the ALSPAC reported sleep disordered symptoms (snoring, mouth breathing and apnoea) for their children at 6, 18, 30, 42, 57, 69 and 81 months. Average facial shells were created for children with and without SDB in order to explore surface differences. RESULTS Differences in facial measurements were found between the children with and without SDB throughout early childhood. The mean differences included an increase in face height in SDB children of 0.3 mm (95% CI -0.52 to -0.05); a decrease in mandibular prominence of 0.9° (95% CI -1.30 to -0.42) in SDB children; and a decrease in nose prominence and width of 0.12 mm (95% CI 0.00 to 0.24) and 0.72 mm (95% CI -0.10 to -0.25), respectively, in SDB children. The odds of children exhibiting symptoms of SDB increased significantly with respect to increased face height and mandible angle, but reduced with increased nose width and prominence. CONCLUSIONS The combination of a long face, reduced nose prominence and width, and a retrognathic mandible may be diagnostic facial features of SBD that may warrant a referral to specialists for the evaluation of other clinical symptoms of SDB.
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Affiliation(s)
- Ala Al Ali
- Applied Clinical Research & Public Health, Dental School, Wales, UK
| | - Stephen Richmond
- Applied Clinical Research & Public Health, Dental School, Wales, UK
| | - Hashmat Popat
- Applied Clinical Research & Public Health, Dental School, Wales, UK
| | - Rebecca Playle
- Applied Clinical Research & Public Health, Dental School, Wales, UK
| | - Timothy Pickles
- Applied Clinical Research & Public Health, Dental School, Wales, UK
| | - Alexei I Zhurov
- Applied Clinical Research & Public Health, Dental School, Wales, UK
| | - David Marshall
- School of Computer Science & Informatics, Cardiff University, Wales, UK
| | - Paul L Rosin
- School of Computer Science & Informatics, Cardiff University, Wales, UK
| | - John Henderson
- Avon Longitudinal Study of Parents and Children, University of Bristol, Bristol, UK
| | - Karen Bonuck
- Department of Family and Social Medicine, Albert Einstein College of Medicine, Bronx, New York, USA
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19
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Neha. Sizing the shape: understanding morphometrics. J Clin Diagn Res 2015; 9:ZC21-6. [PMID: 25738080 DOI: 10.7860/jcdr/2015/8971.5458] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2013] [Accepted: 10/30/2014] [Indexed: 11/24/2022]
Abstract
PURPOSE One of the most fundamental limitations associated with the conventional cephalometrics is its inability to delineate size from shape as it depends mainly on linear and angular measurements. However, the biological structures warrant greater description in terms of shape and form for better comparison of variation in a particular population. To overcome these shortcomings, morphometrics are now being employed for describing the biological structures in terms of quantifying the shape and form. Also, statistical analysis is being applied to find the variability of this form in the population. The present paper assesses the use of the Procuste superimposition technique and the subsequent form analysis by the principal component analysis (PCA). MATERIALS AND METHODS The lateral cephalograms of 10 adult females were taken from existing records, traced & digitized & then superimposed by means of procuste superimposition. A comparison was made with the conventional superimposition methods based on arbitrary reference planes like cranial base, FHP, SN. The statistical analysis for assessment of shape variability of the structures seen on the lateral cephalogram was done by calculating the principal components for 3 out of these 10 samples. RESULTS The conventional superimposition methods do not provide realistic picture of variation in the biological structures as they themselves are prone to variability even in a particular population. CONCLUSION Concepts in Morphometrics can be applied for the purpose of orthodontic assessment of a particular patient with regards to his craniofacial morphology. With the help of morphometrics, norms for a population can be determined based on all the kinds of variations present naturally in that particular population & individuals can thus be compared more realistically regarding the morphological variations.
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Affiliation(s)
- Neha
- Senior Resident, Department of Orthodontics and Dentofacial Orthopaedics, Maulana Azad Institute of Dental Sciences , New Delhi, India
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20
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Krneta B, Zhurov A, Richmond S, Ovsenik M. Diagnosis of Class III malocclusion in 7- to 8-year-old children--a 3D evaluation. Eur J Orthod 2014; 37:379-85. [PMID: 25336564 DOI: 10.1093/ejo/cju059] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVES The aim of this study was to characterize facial and jaw morphology of children with Class III malocclusion in early mixed dentition. METHODS This study was conducted on 7- to 8-year-old Caucasian children, 48 children with Class III malocclusion and 91 children with normal occlusion. Surface images of faces and study casts were obtained using laser scanning. Two average facial templates were constructed for the males and females in the control group. The facial images were superimposed on the corresponding average templates. Facial parameters, palatal volumes, and gingival surface areas were measured and group differences were quantified. The analysis of variance was used for statistical evaluation of the measured parameters. RESULTS The results revealed shorter lower face height (P < 0.001), concave facial profile (P < 0.001), retruded maxilla (P < 0.001), protruded mandible (P < 0.001), retrusive mid-face restricted area (P < 0.001), reduced gingival surface area of the maxilla (P = 0.013), and reduced maxilla/mandible gingival surface area ratio (P < 0.001) in the Class III group compared to the control group. There were no differences between the groups in upper face height, restricted areas of the upper and lower face, palatal volume, and gingival surface area of the mandible (P > 0.05). LIMITATIONS Regardless of the fact that the prevalence of Class III malocclusion is rather small, the sample size could be larger. CONCLUSIONS Class III subjects show clinically relevant facial and jaws characteristics in pre-pubertal growth period. A comprehensive diagnosis should include transverse dimension analysis.
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Affiliation(s)
- Bojana Krneta
- *Department of Dental and Jaw Orthopaedics, Medical Faculty, University of Ljubljana, Slovenia
| | - Alexei Zhurov
- **Dental Health and Biological Sciences, Dental school, Cardiff University, Cardiff, UK
| | - Stephen Richmond
- **Dental Health and Biological Sciences, Dental school, Cardiff University, Cardiff, UK
| | - Maja Ovsenik
- *Department of Dental and Jaw Orthopaedics, Medical Faculty, University of Ljubljana, Slovenia,
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21
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Pound N, Lawson DW, Toma AM, Richmond S, Zhurov AI, Penton-Voak IS. Facial fluctuating asymmetry is not associated with childhood ill-health in a large British cohort study. Proc Biol Sci 2014; 281:20141639. [PMID: 25122232 PMCID: PMC4150332 DOI: 10.1098/rspb.2014.1639] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2014] [Accepted: 07/22/2014] [Indexed: 11/16/2022] Open
Abstract
The idea that symmetry in facial traits is associated with attractiveness because it reliably indicates good physiological health, particularly to potential sexual partners, has generated an extensive literature on the evolution of human mate choice. However, large-scale tests of this hypothesis using direct or longitudinal assessments of physiological health are lacking. Here, we investigate relationships between facial fluctuating asymmetry (FA) and detailed individual health histories in a sample (n = 4732) derived from a large longitudinal study (Avon Longitudinal Study of Parents and Children) in South West England. Facial FA was assessed using geometric morphometric analysis of facial landmark configurations derived from three-dimensional facial scans taken at 15 years of age. Facial FA was not associated with longitudinal measures of childhood health. However, there was a very small negative association between facial FA and IQ that remained significant after correcting for a positive allometric relationship between FA and face size. Overall, this study does not support the idea that facial symmetry acts as a reliable cue to physiological health. Consequently, if preferences for facial symmetry do represent an evolved adaptation, then they probably function not to provide marginal fitness benefits by choosing between relatively healthy individuals on the basis of small differences in FA, but rather evolved to motivate avoidance of markers of substantial developmental disturbance and significant pathology.
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Affiliation(s)
- Nicholas Pound
- Division of Psychology, Department of Life Sciences, Brunel University, London UB8 3PH, UK
| | - David W Lawson
- Department of Population Health, London School of Hygiene and Tropical Medicine, London, UK
| | - Arshed M Toma
- Applied Clinical Research and Public Health, Orthodontic Department, School of Dentistry, Cardiff University, Cardiff, UK
| | - Stephen Richmond
- Applied Clinical Research and Public Health, Orthodontic Department, School of Dentistry, Cardiff University, Cardiff, UK
| | - Alexei I Zhurov
- Applied Clinical Research and Public Health, Orthodontic Department, School of Dentistry, Cardiff University, Cardiff, UK
| | - Ian S Penton-Voak
- School of Experimental Psychology, University of Bristol, Bristol, UK
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22
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Al Ali A, Richmond S, Popat H, Toma AM, Playle R, Pickles T, Zhurov AI, Marshall D, Rosin PL, Henderson J. A three-dimensional analysis of the effect of atopy on face shape. Eur J Orthod 2014; 36:506-11. [PMID: 25257926 PMCID: PMC4174908 DOI: 10.1093/ejo/cjs107] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Three-dimensional (3D) imaging technology has been widely used to analyse facial morphology and has revealed an influence of some medical conditions on craniofacial growth and morphology. The aim of the study is to investigate whether craniofacial morphology is different in atopic Caucasian children compared with controls. Study design included observational longitudinal cohort study. Atopy was diagnosed via skin-prick tests performed at 7.5 years of age. The cohort was followed to 15 years of age as part of the Avon Longitudinal Study of Parents and Children (ALSPAC). A total of 734 atopic and 2829 controls were identified. 3D laser surface facial scans were obtained at 15 years of age. Twenty-one reproducible facial landmarks (x, y, z co-ordinates) were identified on each facial scan. Inter-landmark distances and average facial shells for atopic and non-atopic children were compared with explore differences in face shape between the groups. Both total anterior face height (pg-g, pg-men) and mid-face height (Is-men, sn-men, n-sn) were longer (0.6 and 0.4mm respectively) in atopic children when compared with non-atopic children. No facial differences were detected in the transverse and antero-posterior relationships. Small but statistically significant differences were detected in the total and mid-face height between atopic and non-atopic children. No differences were detected in the transverse and antero-posterior relationships.
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Affiliation(s)
- Ala Al Ali
- *Applied Clinical Research & Public Health, Dental School,
| | | | - Hashmat Popat
- *Applied Clinical Research & Public Health, Dental School
| | - Arshed M Toma
- *Applied Clinical Research & Public Health, Dental School
| | - Rebecca Playle
- *Applied Clinical Research & Public Health, Dental School
| | | | | | - David Marshall
- **School of Computer Science & Informatics, Cardiff University, Wales and
| | - Paul L Rosin
- **School of Computer Science & Informatics, Cardiff University, Wales and
| | - John Henderson
- ***Avon Longitudinal Study of Parents and Children, University of Bristol, UK
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Miyazato E, Yamaguchi K, Fukase H, Ishida H, Kimura R. Comparative analysis of facial morphology between Okinawa Islanders and mainland Japanese using three-dimensional images. Am J Hum Biol 2014; 26:538-48. [DOI: 10.1002/ajhb.22560] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2014] [Revised: 04/11/2014] [Accepted: 04/30/2014] [Indexed: 12/22/2022] Open
Affiliation(s)
- Eri Miyazato
- Department of Human Biology and Anatomy; Graduate School of Medicine; University of the Ryukyus; Okinawa 903-0215 Japan
| | - Kyoko Yamaguchi
- Department of Human Biology and Anatomy; Graduate School of Medicine; University of the Ryukyus; Okinawa 903-0215 Japan
| | - Hitoshi Fukase
- Division of Human Evolution Studies; Graduate School of Medicine, Hokkaido University; Hokkaido 060-8638 Japan
| | - Hajime Ishida
- Department of Human Biology and Anatomy; Graduate School of Medicine; University of the Ryukyus; Okinawa 903-0215 Japan
| | - Ryosuke Kimura
- Department of Human Biology and Anatomy; Graduate School of Medicine; University of the Ryukyus; Okinawa 903-0215 Japan
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Kuijpers-Jagtman AM. Facial variation: from visual assessment to three-dimensional quantification. Eur J Orthod 2013. [PMID: 23193026 DOI: 10.1093/ejo/cjs069] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The extensive study presented by Toma and coworkers is one of the first presenting normative three-dimensional soft tissue face data derived from a large group of 15-year-old Caucasians using laser surface scanning. This data is not only important to quantify facial variation in a normal population but can help to analyse facial dysmorphology. The study methodology and statistical handling of the data provide a good basis for future studies into facial variation.
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Affiliation(s)
- Anne Marie Kuijpers-Jagtman
- Department of Orthodontics and Craniofacial Biology, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands.
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Alqattan M, Djordjevic J, Zhurov AI, Richmond S. Comparison between landmark and surface-based three-dimensional analyses of facial asymmetry in adults. Eur J Orthod 2013; 37:1-12. [DOI: 10.1093/ejo/cjt075] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Djordjevic J, Lawlor DA, Zhurov AI, Toma AM, Playle R, Richmond S. A population-based cross-sectional study of the association between facial morphology and cardiometabolic risk factors in adolescence. BMJ Open 2013; 3:bmjopen-2013-002910. [PMID: 23793675 PMCID: PMC3657674 DOI: 10.1136/bmjopen-2013-002910] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
OBJECTIVE To determine whether facial morphology is associated with fasting insulin, glucose and lipids independent of body mass index (BMI) in adolescents. DESIGN Population-based cross-sectional study. SETTING Avon Longitudinal Study of Parents and Children (ALSPAC), South West of England. PARTICIPANTS From the ALSPAC database of 4747 three-dimensional facial laser scans, collected during a follow-up clinic at the age of 15, 2348 white British adolescents (1127 males and 1221 females) were selected on the basis of complete data on cardiometabolic parameters, BMI and Tanner's pubertal stage. MAIN OUTCOME MEASURES Fasting insulin, glucose and lipids (triglycerides, high-density lipoprotein cholesterol (HDLc) and low-density lipoprotein cholesterol (LDLc)). RESULTS On the basis of the collection of 63 x, y and z coordinates of 21 anthropometric landmarks, 14 facial principal components (PCs) were identified. These components explained 82% of the variation in facial morphology and were used as exposure variables. With adjustment for age, gender and pubertal stage, seven PCs were associated with fasting insulin, none with glucose, three with triglycerides, three with HDLc and four with LDLc. After additional adjustment for BMI, four PCs remained associated with fasting insulin, one with triglycerides and two with LDLc. None of these associations withstood adjustment for multiple comparisons. CONCLUSIONS These initial hypotheses generating analyses provide no evidence that facial morphology is importantly related to cardiometabolic outcomes. Further examination might be warranted. Facial morphology assessment may have value in identifying other areas of disease risk.
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Affiliation(s)
- Jelena Djordjevic
- Department of Applied Clinical Research and Public Health, School of Dentistry, Cardiff University, Cardiff, UK
| | - Debbie A Lawlor
- MRC Centre for Causal Analyses in Translational Epidemiology, University of Bristol, Bristol, UK
- School of Social and Community Medicine, University of Bristol, Bristol, UK
| | - Alexei I Zhurov
- Department of Applied Clinical Research and Public Health, School of Dentistry, Cardiff University, Cardiff, UK
| | - Arshed M Toma
- Department of Applied Clinical Research and Public Health, School of Dentistry, Cardiff University, Cardiff, UK
| | - Rebecca Playle
- Department of Applied Clinical Research and Public Health, School of Dentistry, Cardiff University, Cardiff, UK
| | - Stephen Richmond
- Department of Applied Clinical Research and Public Health, School of Dentistry, Cardiff University, Cardiff, UK
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Djordjevic J, Jadallah M, Zhurov AI, Toma AM, Richmond S. Three-dimensional analysis of facial shape and symmetry in twins using laser surface scanning. Orthod Craniofac Res 2012; 16:146-60. [PMID: 23323545 DOI: 10.1111/ocr.12012] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/06/2012] [Indexed: 11/29/2022]
Abstract
OBJECTIVES Three-dimensional analysis of facial shape and symmetry in twins. SETTING AND SAMPLE POPULATION Faces of 37 twin pairs [19 monozygotic (MZ) and 18 dizygotic (DZ)] were laser scanned at the age of 15 during a follow-up of the Avon Longitudinal Study of Parents and Children (ALSPAC), South West of England. MATERIAL AND METHODS Facial shape was analysed using two methods: 1) Procrustes analysis of landmark configurations (63 x, y and z coordinates of 21 facial landmarks) and 2) three-dimensional comparisons of facial surfaces within each twin pair. Monozygotic and DZ twins were compared using ellipsoids representing 95% of the variation in landmark configurations and surface-based average faces. Facial symmetry was analysed by superimposing the original and mirror facial images. RESULTS Both analyses showed greater similarity of facial shape in MZ twins, with lower third being the least similar. Procrustes analysis did not reveal any significant difference in facial landmark configurations of MZ and DZ twins. The average faces of MZ and DZ males were coincident in the forehead, supraorbital and infraorbital ridges, the bridge of the nose and lower lip. In MZ and DZ females, the eyes, supraorbital and infraorbital ridges, philtrum and lower part of the cheeks were coincident. Zygosity did not seem to influence the amount of facial symmetry. Lower facial third was the most asymmetrical. CONCLUSION Three-dimensional analyses revealed differences in facial shapes of MZ and DZ twins. The relative contribution of genetic and environmental factors is different for the upper, middle and lower facial thirds.
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Affiliation(s)
- J Djordjevic
- Department of Applied Clinical Research and Public Health, Cardiff University Dental Hospital, Cardiff, Wales, UK.
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Hammond P, Suttie M. Large-scale objective phenotyping of 3D facial morphology. Hum Mutat 2012; 33:817-25. [PMID: 22434506 PMCID: PMC3327801 DOI: 10.1002/humu.22054] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2011] [Accepted: 01/26/2012] [Indexed: 12/28/2022]
Abstract
Abnormal phenotypes have played significant roles in the discovery of gene function, but organized collection of phenotype data has been overshadowed by developments in sequencing technology. In order to study phenotypes systematically, large-scale projects with standardized objective assessment across populations are considered necessary. The report of the 2006 Human Variome Project meeting (Cotton et al, 2007) recommended documentation of phenotypes through electronic means by collaborative groups of computational scientists and clinicians using standard, structured descriptions of disease-specific phenotypes. In this report, we describe progress over the past decade in three-dimensional (3D) digital imaging and shape analysis of the face, and future prospects for large-scale facial phenotyping. Illustrative examples are given throughout using a collection of 1,107 3D face images of healthy controls and individuals with a range of genetic conditions involving facial dysmorphism.
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Affiliation(s)
- Peter Hammond
- Molecular Medicine Unit, UCL Institute of Child Health, University College London, London, UK.
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Paternoster L, Zhurov AI, Toma AM, Kemp JP, St Pourcain B, Timpson NJ, McMahon G, McArdle W, Ring SM, Smith GD, Richmond S, Evans DM. Genome-wide association study of three-dimensional facial morphology identifies a variant in PAX3 associated with nasion position. Am J Hum Genet 2012; 90:478-85. [PMID: 22341974 DOI: 10.1016/j.ajhg.2011.12.021] [Citation(s) in RCA: 137] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2011] [Revised: 10/07/2011] [Accepted: 12/27/2011] [Indexed: 11/28/2022] Open
Abstract
Craniofacial morphology is highly heritable, but little is known about which genetic variants influence normal facial variation in the general population. We aimed to identify genetic variants associated with normal facial variation in a population-based cohort of 15-year-olds from the Avon Longitudinal Study of Parents and Children. 3D high-resolution images were obtained with two laser scanners, these were merged and aligned, and 22 landmarks were identified and their x, y, and z coordinates used to generate 54 3D distances reflecting facial features. 14 principal components (PCs) were also generated from the landmark locations. We carried out genome-wide association analyses of these distances and PCs in 2,185 adolescents and attempted to replicate any significant associations in a further 1,622 participants. In the discovery analysis no associations were observed with the PCs, but we identified four associations with the distances, and one of these, the association between rs7559271 in PAX3 and the nasion to midendocanthion distance (n-men), was replicated (p = 4 × 10(-7)). In a combined analysis, each G allele of rs7559271 was associated with an increase in n-men distance of 0.39 mm (p = 4 × 10(-16)), explaining 1.3% of the variance. Independent associations were observed in both the z (nasion prominence) and y (nasion height) dimensions (p = 9 × 10(-9) and p = 9 × 10(-10), respectively), suggesting that the locus primarily influences growth in the yz plane. Rare variants in PAX3 are known to cause Waardenburg syndrome, which involves deafness, pigmentary abnormalities, and facial characteristics including a broad nasal bridge. Our findings show that common variants within this gene also influence normal craniofacial development.
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Affiliation(s)
- Lavinia Paternoster
- MRC Centre for Causal Analyses in Translational Epidemiology, University of Bristol, UK.
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