Morphometric Analysis of Facial Profile in Adults

Krey, Karl-Friedrich; Dannhauer, Karl-Heinz

doi:10.1007/s00056-008-8803-3

Cited by 11 publications

(6 citation statements)

References 32 publications

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“…Previously, PCA was performed on two-dimensional data sets, obtained from either lateral skull radiographs or photographs of both children and adults. [38][39][40][41] The resultant number of PCs in these studies was between 6 and 8, and these explained up to 90% of the total variance in facial profile, based on linear measurements between anthropometric landmarks, or their coordinates. However, with the introduction of sophisticated 3D imaging techniques, the amount of data entering PCA increased significantly.…”

Section: Discussionmentioning

confidence: 92%

A population-based cross-sectional study of the association between facial morphology and cardiometabolic risk factors in adolescence

et al. 2013

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ObjectiveTo determine whether facial morphology is associated with fasting insulin, glucose and lipids independent of body mass index (BMI) in adolescents.DesignPopulation-based cross-sectional study.SettingAvon Longitudinal Study of Parents and Children (ALSPAC), South West of England.ParticipantsFrom 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 measuresFasting insulin, glucose and lipids (triglycerides, high-density lipoprotein cholesterol (HDLc) and low-density lipoprotein cholesterol (LDLc)).ResultsOn 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.ConclusionsThese 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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Section: Discussionmentioning

confidence: 92%

A population-based cross-sectional study of the association between facial morphology and cardiometabolic risk factors in adolescence

et al. 2013

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“…GM has been applied in orthodontic research to study growth, treatment effects, and shape variation [6–8, 12, 15, 16, 20, 21]. …”

Section: Introductionmentioning

confidence: 99%

Geometric morphometrics of different malocclusions in lateral skull radiographs

Freudenthaler

Čelar

Ritt³

et al. 2016

J Orofac Orthop

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BackgroundTo evaluate the role of craniofacial shape in malocclusion by application of geometric morphometrics to a set of two-dimensional landmarks and semilandmarks obtained from lateral skull radiographs.MethodsCephalometric radiograph tracings of 88 untreated Caucasians (age range 7–39 years) were assigned to four groups according to their occlusion: neutrocclusion, distocclusion, mesiocclusion, and anterior open bite. The geometric morphometric shape analysis incorporated 66 landmarks and semilandmarks, which underwent generalized Procrustes analysis, between-groups principal component analysis, thin-plate spline deformation grid visualization, permutation tests, and receiver operating characteristic curves.ResultsThe position and shape of the mandible contributed to differences between the distocclusion and mesiocclusion groups, whereas the maxillary shape showed less variation. The growth-related shape alteration during adolescence was most pronounced in the mesiocclusion group and least pronounced in the neutrocclusion group. The open bite group was associated with an altered orientation of the mandibular body and the maxilla, showed the most hyperdivergent maxillomandibular pattern but was not an own skeletal entity. Despite clear differences in mean shape across the four groups, the individual distribution of craniofacial shape overlapped between the groups without discrete clusters.ConclusionsCraniofacial shape was clearly associated with dental malocclusion and showed considerable variation. Geometric morphometrics was a powerful research tool but for diagnosing individual malocclusion standard cephalometric measurements including overjet and overbite were equally or more efficient than geometric morphometric descriptors.

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“…A number of studies have demonstrated that any change in VDO can compromise the activity of the hyoid and digastric muscles, predisposing individuals to temporomandibular disorder (TMD) [4][5][6] . The analysis of VDOis all the more important in the pediatric population, as young patients are in the growth phase, with all joint structures, bone bases and apical bases undergoing development.…”

Section: Resultsmentioning

confidence: 99%

“…TMD is a term applied to functional abnormalities in the temporomandibular jointand associated structures 1,12,13 . The signs of this disorder are joint noises and limited range of motion or deviation during mandibular function, whereas the symptoms include pain in the pre-auricular region, temporomandibular jointand/or muscles of mastication 5,6,[14][15][16] .…”

Section: Resultsmentioning

confidence: 99%

Avaliação da relação entre disfunção temporomandibular e dimensão vertical de oclusão em crianças de 7 A 12 anos

et al. 2014

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Objetivo verificar se existe relação entre a presença de disfunção temporomandibular (DTM) relacionada à variabilidade da dimensão vertical de oclusão em crianças e adolescentes na faixa etária de 7 a 12 anos. Métodos foram avaliadas 96 crianças e adolescentes do Instituto Rogacionista em São Paulo. A pesquisa diagnóstica da disfunção temporomandibular foi por meio do Índice de Helkimo e exame clínico posterior. Para a mensuração dos dados referentes à dimensão vertical foram empregadas as distâncias comissura labial - canto externo do olho e base do nariz – mento. A comparação dos valores médios das medidas antropométricas entre os gêneros e os grupos com e sem disfunção temporomandibular foi realizada empregando-se a análise de variância (ANOVA) complementada pelo teste least significance diference. Resultados a dimensão vertical de oclusão demonstrou medidas distintas nas crianças e adolescentes em todas as faixas etárias avaliadas, foram observadas alterações significantes dessa medida nas idades de 10 e 12 anos de ambos os gêneros. Conclusão pode -se concluir que na amostra estudada houve relação direta entre a presença de DTM e Dimensão vertical de oclusão (DVO), correlação positiva entre as medidas comissura labial – canto do olho externo e Násio – Mento no sexo feminino e alterações significantes na dimensão vertical de oclusão nas idades de 10 e 12 anos para ambos os sexos.

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Morphometric Analysis of Facial Profile in Adults

Cited by 11 publications

References 32 publications

A population-based cross-sectional study of the association between facial morphology and cardiometabolic risk factors in adolescence

A population-based cross-sectional study of the association between facial morphology and cardiometabolic risk factors in adolescence

Geometric morphometrics of different malocclusions in lateral skull radiographs

Avaliação da relação entre disfunção temporomandibular e dimensão vertical de oclusão em crianças de 7 A 12 anos

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