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      Morfometría de la rama mandibular para la estimación del sexo y edad en una población adulta peruana 2014-2019 Translated title: Morphometry of the mandibular ramus for the estimation of sex and age in a peruvian adult population 2014-2019

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          Abstract

          RESUMEN Objetivo: Evaluar la precisión de la estimación del sexo y edad utilizando la morfometría de la rama mandibular mediante un modelo de regresión lineal múltiple incluyendo el ancho intercondilear, el ancho bigonial, la longitud coronoides, la longitud de la rama mandibular, la longitud del cóndilo, el ancho máximo de la rama mandibular y el ángulo goniaco en una población adulta peruana 2014-2019. Material y métodos: Se utilizaron 174 tomografías computarizadas de 18 a 60 años de edad y se analizaron las variables ancho intercondileo (AI), ancho bigonial (AB), longitud coronoides (LCr), longitud del cóndilo (LC), longitud de la rama mandibular (LRm), ancho máximo de la rama mandibular (AMRm) y ángulo goniaco (AG) del lado derecho de la mandíbula. Resultados: La prueba t de muestras independientes determinó que la mayor diferencia entre el sexo fue en la variable LC con 6.9225 mm, la función discriminante obtuvo una tasa de clasificación correcta del sexo con 82.7% y con el modelo de regresión logística múltiple se obtuvo una sensibilidad en el sexo femenino de 81.2%, una especificidad de 85.7%, el sexo masculino una sensibilidad de 85.7%, una especificidad de 81.2%, en la edad la correlación más alta fue en AG con -0.252. Conclusión: Los coeficientes más potentes fueron en LRm, AI y AB con 0.608, 0.606 y 0.604 respectivamente. La mayor diferencia se encontró en el ancho intercondilar con 9.3 mm entre los sexos, en general el porcentaje de precisión predictiva fue de 83.9% en una población egipcia muy parecido a este estudio.

          Translated abstract

          ABSTRACT Objective: To evaluate the precision of the estimation of sex and age using the morphometry of the mandibular ramus through a multiple linear regression model including the intercondylar width, the bigonial width, the coronoid length, the length of the mandibular ramus, the length of the condyle, the maximum width of the mandibular ramus and the gonial angle in a Peruvian adult population 2014-2019. Material and methods: 174 computed tomography scans from 18 to 60 years of age were used and the variables intercondylar width (AI), bigonial width (AB), coronoid length (CLr), condyle length (LC), ramus length mandibular ramus (MRm), maximum width of the mandibular ramus (MRAm) and gonial angle (AG) of the right side of the mandible. Results: The independent samples t-test determined that the greatest difference between the sexes was in the LC variable with 6.9225 mm, the discriminant function obtained a correct classification rate of the sex with 82.7% and with the multiple logistic regression model a sensitivity in the female sex of 81.2%, a specificity of 85.7%, the male sex a sensitivity of 85.7%, a specificity of 81.2%, in age the highest correlation was in AG with -0.252. Discussion: The most powerful coefficients were in LRm, AI and AB with 0.608, 0.606 and 0.604 respectively. The greatest difference was found in the intercondylar width with 9.3 mm between the sexes, in general the percentage of predictive accuracy was 83.9% in an Egyptian population very similar to this study.

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          Sexual dimorphism of the mandible in a modern Egyptian population.

          Although human sex difference are now better known worldwide, there are few osteometric studies designed for sex assessment in Egyptians. The current study is the first to be conducted on this population to evaluate sex determination using osteometric mandibular measurements. By the use of spiral CT scan with three dimension reconstruction modality six mandibular measurements were assessed in 330 person (165 males and 165 females). These were subjected to statistical analysis. Many variables showed significant differences and included: bicondylar breadth, gonial angle and minimum ramus breadth. The study concluded that the overall predictive accuracy of this prediction model was 83.9% for whole studied persons. The correct predictive accuracy was 83.6% in males and 84.2% in females.
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            Anthropometric analysis of mandible: an important step for sex determination.

            The first step in the forensic identification is sex determination followed by age and stature estimation, as both are sex-dependent. The mandible is the largest, strongest and most durable bone in the face. Mandible is important for sex confirmation in absence of a complete pelvis and skull.
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              Panoramic radiograph as a forensic aid in age and gender estimation: Preliminary retrospective study

              Background: The temporomandibular joint is a hinge joint which is formed by the mandible with articulation of the jaw with the cranium. The morphology of the mandible is evaluated by measuring the gonial angle ramus height and bigonial width. Aim: The aim of this study to investigate the impact of age and gender on ramus height, gonial angle and bigonial width in the dentulous odisha population using digital panaromic radiographs. Materials and Methods: A total of 50 dentulous participants (25 males and 25 females) aged between 10 and 80 years were included in this study. The data were collected after comprehensive examination by 1 principal and two coinvestigators. Statistical Analysis: The mean difference between gender and different age groups was calculated using SPSS version 20.0. Unpaired t-test and one-way ANOVA were used for comparison studied parameters according to gender, side and different age groups followed by Tukey's post hoc test. Results: A statistically significant gender difference was seen for gonial angle, ramus height and bigonial width. All the parameters increased with increase in age. This difference was statistically significant on the right side for gonial angle and ramus height. Conclusion: This study is useful as for age and sex determination using mandible as primary object in forensic odontology.
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                Author and article information

                Journal
                odonto
                Avances en Odontoestomatología
                Av Odontoestomatol
                Ediciones Avances, S.L. (Madrid, Madrid, Spain )
                0213-1285
                2340-3152
                June 2023
                : 39
                : 2
                : 108-113
                Affiliations
                [6] orgnameUniversidad Nacional Pedro Ruíz Gallo Perú
                [2] Lima orgnameUniversidad Nacional Federico Villarreal Peru
                [4] Lima orgnameUniversidad Nacional Federico Villarreal Peru
                [1] Lima orgnameUniversidad Nacional Federico Villarreal Peru
                [5] Lima orgnameUniversidad Nacional Federico Villarreal Peru
                [3] Lima orgnameUniversidad Nacional Federico Villarreal Peru
                Article
                S0213-12852023000200008 S0213-1285(23)03900200008
                7150954f-51b8-40da-b0a3-1a0d2777e0a4

                This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 International License.

                History
                : 27 August 2022
                : 10 October 2022
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 8, Pages: 6
                Product

                SciELO Spain

                Categories
                Artículos

                Estimación sexo,estimación edad,morfometría,tomografía,Sex estimation,age estimation,morphometry,tomography

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