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1.
Int. j. morphol ; 32(2): 537-541, jun. 2014. ilus
Article in English | LILACS | ID: lil-714305

ABSTRACT

The need to identify bodies that are found as a result of disappearances with a diversity of causes, illegal burials and massive disasters, represent a wide percentage of dentistry practice on forensic research. The following study determined the performance of Barr Body Test, in fibroblasts of healthy teeth, under different conditions of burial (in vitro) with variations in pH, humidity and salinity in terms of general accuracy and sensitivity for men and women. Analyzed sample considered 47 dental pulps, taken from teeth under burial conditions during a period of a month. From dental pulps samples, 265 histological cuts valid for this study, were obtained, which were observed with an optical microscope under conventional H/E staining. Results showed a 98.9% of well-diagnosed cases, which correspond to the overall accuracy of the method. Sensitivity for men was 97.5% and 100% for women, over the analyzed sample. In low humidity conditions, 3 samples of badly diagnosed cases in men were observed, with a group accuracy of a 90%, with a sensitivity of 25% for men and 100% for women. The present study establishes that based on these results, the performance of Barr Body Test in fibroblasts, proposed for healthy pulp teeth, is not affected by burial conditions in terms of pH (acid-alkaline), salinity (high-low) and high humidity.


La necesidad de identificar cuerpos que resultan como consecuencia de desapariciones de causas variadas, inhumaciones ilegales y desastres masivos representa un porcentaje amplio en el quehacer odontológico en un escenario de investigación forense. El presente estudio determinó el rendimiento de la prueba diagnóstica de observación del cuerpo de Barr en células de la pulpa de dientes sanos, sometidos a distintas condiciones de enterramiento (in vitro) con variación de pH, humedad y salinidad en términos de exactitud general y sensibilidad para hombres y mujeres. La muestra analizada consideró 47 pulpas dentales, extraídas de dientes sometidos a condiciones de enterramiento durante un mes. De las pulpas dentarias se obtuvieron 265 cortes histológicos válidos para el estudio, los cuales mediante la tinción convencional H/E, fueron observados al microscopio óptico. Los resultados arrojaron un 98,9% de casos bien diagnosticados, que correspondió a la exactitud general del método. La sensibilidad para hombres fue de 97,5% y para mujeres de 100% sobre el total de la muestra analizada. Las condiciones de pH (ácido y alcalino), salinidad (alta y baja) y alta humedad presentaron una exactitud de grupo de 100%, con una sensibilidad para hombres y mujeres de 100%. En la condición de baja humedad se observaron 3 muestras de hombres mal diagnosticadas con una exactitud de grupo de 90% y sensibilidad para hombres de 25% y para mujeres de 100%. A la luz de los resultados, el presente estudio establece que el rendimiento de la prueba diagnóstica de observación del cuerpo de Barr en fibroblastos, propuesto para pulpas de dientes sanos, no se afecta con las condiciones de enterramiento propuestas bajo pH ácido ­ alcalino, salinidad alta ­ baja y humedad alta.


Subject(s)
Humans , Male , Female , Adolescent , Adult , Sex Chromatin/ultrastructure , Sex Determination Analysis/methods , Burial , Dental Pulp/ultrastructure , Fibroblasts/ultrastructure , Salinity , Humidity , Hydrogen-Ion Concentration , Immersion
2.
Int. j. morphol ; 30(2): 588-591, jun. 2012. ilus
Article in English | LILACS | ID: lil-651835

ABSTRACT

Observation of sexual chromatin has shown to be very helpful in gender forensic diagnosis. In the present study we analyzed the diagnosis performance of the method in, non-treated or treated with conventional bone techniques, exhumed bone pieces. We used long bones of male and female individuals, the method applied is described in Suazo et al. (2010). In the non-treated exhumed pieces, the general accuracy of the method was 75 percent, while in the treated pieces the method was inapplicable due to the lack of cells in the tissue. Our results suggest that it is possible to determine the sex of aged human bones buried under different conditions through a fast and simple histological method, but the treatment with physical and chemical means eliminates the remaining cells in the bone tissue.


La observación de la cromatina sexual ha demostrado ser útil en el diagnóstico forense del sexo. En este estudio analizamos el rendimiento diagnóstico del método en piezas óseas exhumadas no tratadas y tratadas mediante osteotécnica convencional. Utilizamos muestras de huesos largos de individuos de sexo masculino y femenino, el método se aplicó de acuerdo a lo descrito por Suazo et al., (2010). En las piezas exhumadas no tratadas la exactitud general del método fue del 75 por ciento, mientras que en las piezas tratadas el método resultó inaplicable, debido a la ausencia de células en el tejido. Nuestros resultados sugieren que es posible determinar el sexo en osamentas humanas exhumadas de larga data y en diferentes condiciones de enterramiento, mediante un método histológico rápido y sencillo, pero que el tratamiento por medios físicos y químicos elimina las células remanentes en el tejido óseo.


Subject(s)
Female , Sex Determination Analysis , Forensic Anthropology/methods , Bone and Bones , Sex Chromatin/ultrastructure , Exhumation
3.
Ceylon Med J ; 1993 Sep; 38(3): 127-8
Article in English | IMSEAR | ID: sea-48312

ABSTRACT

There is a marked difference between the frequencies of neutrophil nuclear drumsticks and mucosal cell Barr bodies in any given woman despite the fact that both represent an inactivated X chromosome. We present results of a prospective study carried out on 100 normal Saudi females to assess the statistical correlation between these two variables. We conclude that each is independent of the other. The lack of statistical correlation perhaps relates to maturational and nuclear configuration factors.


Subject(s)
Adult , Female , Humans , Mouth Mucosa/cytology , Neutrophils/ultrastructure , Probability , Prospective Studies , Reference Values , Saudi Arabia , Sex Chromatin/ultrastructure
4.
Rev. paul. med ; 110(5): 195-9, Sept.-Oct. 1992. tab
Article in English | LILACS | ID: lil-134394

ABSTRACT

The frequency of X-chromatin was determined in pregnant women during the second trimester of gestation in order to establish possible correlations with the changes in steroid hormone levels occurring during this period and compare the curve with that for normal nonpregnant women. The mean frequency of X-chromatin in oral mucosa cells from a salivary suspension was 19.97% for the 24 patients studied, a statistically higher value than that obtained for nonpregnant women


Subject(s)
Humans , Female , Gene Frequency , Pregnancy/genetics , Sex Chromatin/ultrastructure , X Chromosome/ultrastructure , Adult , Analysis of Variance , Mouth Mucosa/ultrastructure , Pregnancy Trimester, Second
8.
Indian J Med Sci ; 1979 Mar; 33(3): 65-8
Article in English | IMSEAR | ID: sea-68000
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