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Validação do método de Nolla e de Moorrees na estimativa da idade dentária numa população Portuguesa dos 17 aos 23 anos
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Abstract(s)
Introdução: Nas ciências forenses, a estimativa de idade é uma das principais áreas de investigação científica. Na área médico-legal, a estimativa de idade é importante na identificação individual.
Objetivo: O objetivo principal desta investigação consistiu em estimar a idade cronológica de uma população portuguesa entre os 17 e os 23 anos, através da aplicação de metodologias morfológicas aplicadas aos terceiros molares, métodos de Nolla e Moorrees, de forma a verificar qual dos métodos apresenta maior precisão na estimativa da idade dentária.
Materiais e Métodos: Foram selecionadas 348 ortopantomografias numa população dos 12 aos 23 anos dividida em dois grupos etários, dos 12 aos 16 anos e dos 17 aos 23 anos. Foram aplicados os métodos de Nolla e Moorrees para o cálculo da estimativa de idade.
Resultados e Discussão: O coeficiente kappa ponderado de Cohen varia entre 0,848 e 0,923. Os resultados mostraram que os métodos estimam a idade sem diferenças estatisticamente significativas com a idade cronológica. O coeficiente de determinação ajustado para o método de Moorrees é 0,732, para o método de Nolla é de 0,739 e para os dois métodos juntos é de 0,735. Quando comparamos as estimativas de idade pelos dois métodos existem diferenças estatisticamente significativas. Na comparação dos erros entre os dois grupos etários, para o grupo dos 12 aos 16 anos de idade há uma subestimação de aproximadamente 5 meses, no grupo do estudo dos 17 aos 23 anos de idade há uma sobrestimação média de 7,5 meses. Deste modo, há diferenças estatisticamente significativas entre os dois subgrupos.
Conclusão: Conclui-se que os estádios de Nolla e de Moorrees aplicado ao terceiro molar fornecem uma estimativa da idade cronológica na população portuguesa dos 17 aos 23 anos de idade para aplicação médico-legal, apesar de se verificar uma ligeira sobrestimação da idade.
Introduction: In forensic sciences, age assessment is one of the main fields of research. In the medico-legal area, age estimation is important on individual identification. Objective: The aim of the present research was to estimate the chronological age of a Portuguese population between 17 and 23 years old, through the application of morphological methodologies applied to third molars - Nolla and Moorrees methods - in order to verify which of the methods has higher accuracy on dental age assessment. Matherials and Methods: The total sample consisted of 348 orthopantomographies aged between 12 and 23 years old. Nolla and Moorrees’ age estimation methods were applied by the 2 subgroups: 12 until 16 years and 17 and 23 years. Results and Discussion: Cohen's weighted kappa coefficient varies between 0.848 and 0.923. The results showed that both methods estimate the age without statistically significant differences with chronological age. The adjusted coefficient of determination for the Moorrees method is 0.732, for the Nolla method it is 0.739 and for the two methods together it is 0.735. When comparing age estimation by the two methods, there are statistically significant differences between them. In the comparison of errors between the two groups, for the 12 to 16 years old group there is an underestimation of approximately 5 months, in the study group between 17 and 23 years old there is an overestimation of 7.5 months. There are statistically significant differences between the two subgroups. Conclusions: Both methods are applicable in the Portuguese population between 17 and 23 years by the lower third molar. These methods can be used for assessing age in forensic as well as legal contexts, despite a slight overestimation of age.
Introduction: In forensic sciences, age assessment is one of the main fields of research. In the medico-legal area, age estimation is important on individual identification. Objective: The aim of the present research was to estimate the chronological age of a Portuguese population between 17 and 23 years old, through the application of morphological methodologies applied to third molars - Nolla and Moorrees methods - in order to verify which of the methods has higher accuracy on dental age assessment. Matherials and Methods: The total sample consisted of 348 orthopantomographies aged between 12 and 23 years old. Nolla and Moorrees’ age estimation methods were applied by the 2 subgroups: 12 until 16 years and 17 and 23 years. Results and Discussion: Cohen's weighted kappa coefficient varies between 0.848 and 0.923. The results showed that both methods estimate the age without statistically significant differences with chronological age. The adjusted coefficient of determination for the Moorrees method is 0.732, for the Nolla method it is 0.739 and for the two methods together it is 0.735. When comparing age estimation by the two methods, there are statistically significant differences between them. In the comparison of errors between the two groups, for the 12 to 16 years old group there is an underestimation of approximately 5 months, in the study group between 17 and 23 years old there is an overestimation of 7.5 months. There are statistically significant differences between the two subgroups. Conclusions: Both methods are applicable in the Portuguese population between 17 and 23 years by the lower third molar. These methods can be used for assessing age in forensic as well as legal contexts, despite a slight overestimation of age.
Description
Tese de mestrado, Medicina Dentária, Universidade de Lisboa, Faculdade de Medicina Dentária, 2020
Keywords
Saúde Oral Teses de mestrado - 2020