Navegando por Palavras-chave "Sex determination"

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    Accuracy of Palate Shape as sex Indicator in Human Skull with Maxillary Teeth Loss
    (Soc Chilena Anatomia, 2008-12-01) Galdames, Ivan Claudio Suazo [UNIFESP]; Matamala, Daniela Zavando [UNIFESP]; Smith, Ricardo Luiz [UNIFESP]; Univ Talca; Universidade Federal de São Paulo (UNIFESP)
    In forensic medicine, diagnosis of sex is the first step in the identification of human skulls. A first approximation is carried out via the qualitative analysis of a series of morphological indicators of sexual dimorphism. Classical studies (Krogman & Iscan, 1986) described 14 indicators for the diagnosis of sex with an accuracy of 90%, and one of these indicators is the shape of the palate. This study analyzed the effect of the loss of teeth on the accuracy of the diagnosis of sex in Brazilians adult skulls, using the shape of the palate as an indicator. We used 98 skulls of adult Brazilians, comprising 35 females and 63 males with an average age of 39.3 years (SD 7.8). The skulls were classified into two groups, namely the fully edentulous maxilla and the partial edentulous maxilla. An inclusion criterion in the partial edentulous maxilla group was the presence of canine or their alveolus. The accuracy for the diagnosis of sex in the total sample was 75.5% (with a sensitivity of 88.8% for male skulls and 51.5% for female skulls), while it was slightly higher (76.9%) in the fully edentulous maxilla group with a sensitivity from 84% to 70% for both male and female skulls. However, the partial edentulous maxilla group presented lower values of accuracy of 74.5%, and a sensitivity of 90% for male skulls and 26% for female skulls. Thus, this work suggests that the accuracy of diagnosis of sex using the shape of the palate as an indicator of sexual dimorphism is not significantly affected by full edentulism; however, the presence of teeth favors the underestimation of the female skulls
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    Evaluation of the Baudoin Condylar Index Diagnostic Test for Sex Determination
    (Soc Chilena Anatomia, 2010-03-01) Galdames, Ivan Claudio Suazo [UNIFESP]; Matamala, Daniela Zavando [UNIFESP]; Russo, Priscila [UNIFESP]; Smith, Ricardo Luiz [UNIFESP]; Univ Talca; Universidade Federal de São Paulo (UNIFESP); Univ Autonoma Chile
    This article analyzes the performance of diagnostic tests for sex determination by examining human skulls, using the Baudoin condylar index. For this study, 215 skulls were examined, and the maximum dimensions (length and width) of the right and left occipital condyles, were noted. With these data, we calculated the Baudoin condylar index and determined the level of agreement between the values for the left and the right side, the sensitivity of the method, the accuracy of the tests and the positive predictive value for each sex. The level of agreement in the diagnosis based on both sides was 65.58% (of which 83.09% were of women, and 63.88% were of men). The overall accuracy was 41.39%, and a greater sensitivity was seen in women (52.1% right side and 64.78% left). The positive predictive value was higher in male skulls (77.6% right side, left side 76.68%). These results question the usefulness of the Baudoin condylar index for the diagnosis of sex and discuss the usefulness of their applicability in forensic and anthropological practice.
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    Sex Determination in Mandibles in the First Year of Life by a Quantitative Approach
    (Soc Chilena Anatomia, 2009-03-01) Galdames, Ivan Claudio Suazo [UNIFESP]; Matamala, Daniela Zavando [UNIFESP]; Smith, Ricardo Luiz [UNIFESP]; Univ Talca; Universidade Federal de São Paulo (UNIFESP)
    Numerous studies have shown that skeletal characteristics vary among different populations. Several authors suggest that it is possible to determine sex through the anatomical evaluation of children mandible, however there are few morphometrical studies conducted with such specimens. The purpose of this study was to analyze several mandibular dimensions and identify the ones that could be useful to perform sex differentiation in a sample of Brazilian young children. For this study we used 32 children dry mandibles of known sex, age ranging from 0 to 1 year old. The mandibles pertain to the collection of the Skull Museum of the Universidade Federal de Sao Paulo (UNIFESP). The parameters included bicondilar width, bigonial width, minimum width and height of the mandibular ramus, gonion-gnation length, height of the mandibular symphysis and transverse and anteroposterior condylar dimensions. The SPSS program was used to carry on the discriminant function analysis and the T test (p < 0.05). There were no statistically significant differences that could allow identification of a specific parameter for sex determination. However, most of the dimensions were higher in male than in female, except for the minimum width of the mandibular ramus (0.2-0.16 mm) and transverse diameter of the right condyle (0.16mm). The values obtained for the anteroposterior diameter of the mandibular head were the most different between genders, although no statistically significance was found. Discriminant function analysis indicated that, despite differences, none of the evaluated parameters allow for sex classification with enough reliability. In conclusion, there is little sexual dimorphism in children's mandibles during the first year of life and anatomical analysis of this structure is not recommended as reliable quantitative approach for sex differentiation with forensic purposes.
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    Sex Determination Using Mastoid Process Measurements in Brazilian Skulls
    (Soc Chilena Anatomia, 2008-12-01) Galdames, Ivan Claudio Suazo [UNIFESP]; Matamala, Daniela Zavando [UNIFESP]; Smith, Ricardo Luiz [UNIFESP]; Univ Talca; Universidade Federal de São Paulo (UNIFESP)
    The mastoid process characteristics are of great utility in the diagnosis of sex. De Paiva & Segre (2003) described that sex diagnosis was possible based on the determination of the area of the triangle formed by the points porion, mastoidale, and asterion. The purpose of this study was to determine the existence of sexual dimorphism in the dimensions and the area of the mastoid triangle using statistical and discriminant function analysis. A total of 81 skulls of Brazilian individuals that were part of the Museum of the Federal University of Sao Paulo (UNIFESP) collection were used, with sex and ages known: 50 men and 31 women between 40 and 70 years of age (mean 51.58 years, SD 7.319). Most of the lineal dimensions and the calculated areas were higher in men than in women. Only the distance porion-mastoidale, the area of the right mastoid triangle and the total area, was higher and more significant in men with p < 0.01. The analysis of the discriminant function showed that the group of analyzed lineal dimensions presents a low discriminant capacity (Lambda of Wilks = 0.960, Canonical Correlation = 0.199); only porion-mastoidale allowed one to distinguish men's groups from women with a general accuracy of 64.2%, but with a high sensibility to classify men (93%) and a very low sensibility for women (17.7%). These results indicate that the determination of sex based on the dimensions of the mastoid triangle leads to underestimate the women, hence being of less utility in practice.