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Abstract(s)
Introdução: A diagnose sexual é um passo fundamental para a determinação
do perfil biológico de indivíduos vivos ou cadáveres. A mandíbula é um dos ossos
do crânio mais dimórficos e resistentes à decomposição, sendo relevante na
determinação do sexo do indivíduo. Com os avanços tecnológicos percebeu-se
a utilidade e precisão da tecnologia 3D, nomeadamente do CBCT na recolha e
análise métrica de estruturas ósseas. Objetivo: Análise métrica digital do
dimorfismo sexual de uma amostra de mandíbulas pertencentes ao Instituto
Nacional de Medicina Legal e Ciências Forenses, IP.
Materiais e Métodos: Estudo observacional constituído por uma amostra de 33
mandíbulas, 14 do sexo feminino e 19 do masculino. Registou-se
fotograficamente as peças ósseas e pertences pessoais com código e sexo. Os
dados foram recolhidos usando o CBCT Planmeca ProMax® 3DMid e a medição
através do software Simplant Pro 17.01. O estudo estatístico descritivo e
inferencial foi realizado pelo software IBM® SPSS® versão 26.01. Os parâmetros
definidos foram: largura máxima e largura mínima do ramo mandibular, alturas
condilar, do processo coronóide, e da sínfise mandibular, ângulo do ramo
mandibular, distâncias bimentoniana, biantegoniana, bigoníaca e bicondilar e
comprimento máximo mandibular. Denominados de A. a K., respetivamente.
Resultados: Houve diferenças estatisticamente significativas nos parâmetros:
Altura do processo coronóide, Altura condilar, Comprimento máximo mandibular
e Largura mínima do ramo mandibular (p < 0,05). Na análise estatística
multivariada, pelo método Stepwise, foi possível identificar a Altura do processo
coronóide como o melhor parâmetro preditor do sexo, com exatidão de 72,2%.
Permitindo classificar mandíbulas femininas e masculinas em 64,3% e 78,9% de
exatidão, respetivamente.
Conclusão: Presença de dimorfismo sexual em quatro parâmetros. A altura do
processo coronóide é o parâmetro mais dimórfico e o melhor preditor do sexo na
amostra
Introduction: Sexual diagnosis is a fundamental step in determining the biological profile of living individuals or cadavers. The mandible is one of the most dimorphic bones in the skull and resistant to decomposition, being relevant in determining the individual's sex. With technological advances, the usefulness and precision of 3D technology was realized, namely the Cone Beam Computed Tomography in the collection and metric analysis of bone structures. Objective: Digital metric analysis of sexual dimorphism in a sample of mandibles belonging to the National Institute of Legal Medicine and Forensic Sciences, IP. Materials and Methods: Observational study of a sample of 33 mandibles, 14 female and 19 male. The bone pieces and personal belongings with code and gender were photographically registered. Data were collected using the Cone Beam Computed Tomography Planmeca ProMax® 3DClassic and measurement was done by using the Simplant Pro 17.01 software. Descriptive and inference statistical study was performed using IBM® SPSS® software version 26.01. The parameters defined were: maximum and minimum width of the mandibular ramus, condylar heights; coronoid process heights, mandibular symphysis heights, mandibular angle, bi-mental, bi-antegonial, bi-gonial and bi-condylar distances and maximal mandibular length. Denominated from A. to K., respectively. Results: There were statistically significant difference in the following parameters: coronoid process height, condyle height, maximum length of mandible and minimum width of mandibular ramus (p <0.05). In a multivariate statistical analysis, by the stepwise method, it was possible to identify the coronoid process height as the best sex predictor, accurately in 72.2% of cases. Allowing to differentiate female and masculine jaws at 64.3% and 78.9% accuracy, respectively. Conclusion: Presence of sexual dimorphism in four parameters. The coronoid process height is the most dimorphic parameter and the best sex predictor in the sample
Introduction: Sexual diagnosis is a fundamental step in determining the biological profile of living individuals or cadavers. The mandible is one of the most dimorphic bones in the skull and resistant to decomposition, being relevant in determining the individual's sex. With technological advances, the usefulness and precision of 3D technology was realized, namely the Cone Beam Computed Tomography in the collection and metric analysis of bone structures. Objective: Digital metric analysis of sexual dimorphism in a sample of mandibles belonging to the National Institute of Legal Medicine and Forensic Sciences, IP. Materials and Methods: Observational study of a sample of 33 mandibles, 14 female and 19 male. The bone pieces and personal belongings with code and gender were photographically registered. Data were collected using the Cone Beam Computed Tomography Planmeca ProMax® 3DClassic and measurement was done by using the Simplant Pro 17.01 software. Descriptive and inference statistical study was performed using IBM® SPSS® software version 26.01. The parameters defined were: maximum and minimum width of the mandibular ramus, condylar heights; coronoid process heights, mandibular symphysis heights, mandibular angle, bi-mental, bi-antegonial, bi-gonial and bi-condylar distances and maximal mandibular length. Denominated from A. to K., respectively. Results: There were statistically significant difference in the following parameters: coronoid process height, condyle height, maximum length of mandible and minimum width of mandibular ramus (p <0.05). In a multivariate statistical analysis, by the stepwise method, it was possible to identify the coronoid process height as the best sex predictor, accurately in 72.2% of cases. Allowing to differentiate female and masculine jaws at 64.3% and 78.9% accuracy, respectively. Conclusion: Presence of sexual dimorphism in four parameters. The coronoid process height is the most dimorphic parameter and the best sex predictor in the sample
Description
Keywords
Mandíbulas Dimorfismo sexual CBCT Análise métrica Jaws Sexual dimorphism Cone Beam Computed Tomography Metric analysis