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1.
Braz Oral Res ; 34: e051, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32578761

RESUMO

The aim of this study was to verify the precision and applicability of two methods of age estimation, Kvaal's and Cameriere's methods, among Brazilian adults. A sample composed of periapical radiographs of canine teeth belonging to 320 Brazilian adults was analyzed, divided into groups according to sex (male and female) and age group (20-29 years, 30-39 years, 40-49 years and 50-59 years). Kvaal's method presented better results when compared to the results of Cameriere's method in the general evaluation of each canine tooth, except for the upper left canine (tooth 23), which presented a mean error (ME) with no statistically significant difference between the methods (Kvaal: ME = 7.43, p = 0.4991, Cameriere: ME = 7.55, p = 0.6982). In the evaluation by age groups, Kvaal's method presented a lower variation between the real age and estimated age when applied to the age groups of 20-29 years and 30-39 years compared to the results provided by Cameriere's method. With respect to the groups aged 40 to 49 years and 50 to 59 years, Cameriere's method presented better performance than the results provided by Kvaal's method. The methods of estimating age proposed by Kvaal and Cameriere are simple and nondestructive and have demonstrated reproducibility and reliability. The Kvaal method was more accurate for the age groups of 20-29 and 30-39 years, and for those over 40 years, the Cameriere method was the most accurate.


Assuntos
Determinação da Idade pelos Dentes/métodos , Adulto , Fatores Etários , Brasil , Dente Canino/anatomia & histologia , Dente Canino/diagnóstico por imagem , Feminino , Odontologia Legal/métodos , Humanos , Masculino , Pessoa de Meia-Idade , Radiografia Dentária Digital/métodos , Padrões de Referência , Reprodutibilidade dos Testes
2.
J Forensic Odontostomatol ; 1(38): 48-50, 2020 May 15.
Artigo em Inglês | MEDLINE | ID: covidwho-302647

RESUMO

The Covid 19 pandemic we are currently facing all over the world is undoubtly an emergency condition which exposes all workers to the risks of a serious infection. The personnel working in the autoptic room is at high risk for the possible contact with infected material from corpses, splashes and aerosols diffusion, and must be always prepared to stay safe and healthy. We offer to the forensic odontologists' community a short summary of some old and new hints on the treatment of dead bodies in the autopsy room during this pandemic emergency time.


Assuntos
Autopsia , Infecções por Coronavirus , Odontologia Legal , Controle de Infecções , Pandemias , Pneumonia Viral , Betacoronavirus , Humanos
3.
J Forensic Odontostomatol ; 1(38): 2-7, 2020 May 15.
Artigo em Inglês | MEDLINE | ID: mdl-32420907

RESUMO

Patient safety and quality of healthcare delivery systems are an objective of WHO. This study aims to present and analyse Portuguese clinical data on risk and malpractice in dental practice. Data from the Forensic Dentistry Laboratory (Faculty of Medicine, University of Coimbra) was analysed, between the years of 2013 to 2018. One hundred and seven technical reports were selected, and seventy nine files were included in the iatrogenic sequelae group. Data included the analysis of the performance of dental professionals. Sequelae were divided in descending order of occurrence:1) mandibular dysfunction (53,2%)[(42)79]; 2) neurological deficit (39,2%)[(31)79]; 3) tooth loss (6,3%)[(5)79]; and 4) opening deficit (1,3%)[(1)79].Three major areas with significant expression in the field of expert evaluations were analysed: 1) orthodontic treatment (51,9%), implant rehabilitation (29,1%), and oral surgery. Given the prevalence of malpractice, the need to assess its causes and recognise standards for its prevention is necessary.


Assuntos
Responsabilidade Legal , Imperícia , Assistência Odontológica , Odontologia Legal , Humanos , Portugal
4.
J Forensic Odontostomatol ; 1(38): 48-50, 2020 May 15.
Artigo em Inglês | MEDLINE | ID: mdl-32420913

RESUMO

The Covid 19 pandemic we are currently facing all over the world is undoubtly an emergency condition which exposes all workers to the risks of a serious infection. The personnel working in the autoptic room is at high risk for the possible contact with infected material from corpses, splashes and aerosols diffusion, and must be always prepared to stay safe and healthy. We offer to the forensic odontologists' community a short summary of some old and new hints on the treatment of dead bodies in the autopsy room during this pandemic emergency time.


Assuntos
Autopsia , Infecções por Coronavirus , Odontologia Legal , Controle de Infecções , Pandemias , Pneumonia Viral , Betacoronavirus , Humanos
5.
Int. j. morphol ; 38(2): 322-327, abr. 2020. tab, graf
Artigo em Espanhol | LILACS | ID: biblio-1056442

RESUMO

La estimación de edad compone un aspecto importante en investigaciones forenses. Diferentes métodos se han descrito en odontología forense basadas en la correlación entre la edad y estructuras dentales. Cameriere et al. proponen un método cuantitativo para estimación de edad en adultos, a partir de la evaluación de la relación del área pulpa/diente, en base a la aposición de dentina secundaria. El objetivo del estudio fue desarrollar modelos de regresión para la estimación de edad dental mediante la relación área pulpa/diente en caninos inferiores en una muestra Chilena. Se analizaron 212 radiografías periapicales digitales (RPD) (86 hombres y 126 mujeres) de caninos mandibulares mediante el programa Image J para establecer el área de la pulpa y el diente. Se registraron los datos de sexo y edad de las RPD seleccionadas en forma ciega. Fueron desarrollados modelos de regresión lineal simples para la estimación de edad. El coeficiente de determinación para R33 fue 27,8 % y de 29,6 % para R44, con un error absoluto medio de 11,02 años y 10,37 años respectivamente. El análisis de ANOVA no mostró diferencias estadísticamente significativas para las relaciones área pulpa/diente de caninos según sexo (p> 0,05). Según los resultados obtenidos, la metodología propuesta por Cameriere et al. es fiable para estimar la edad dental mediante la relación área pulpa/diente en adultos. Sin embargo, en los modelos de regresión desarrollados para la población Chilena, se puede afirmar que el ajuste indicado por los coeficientes de determinación muestran incerteza entre las variables área pulpa/diente y edad cronológica en caninos inferiores, por lo tanto se sugiere considerar otros métodos adicionales para estimar edad en esta población.


Age estimation is an important aspect In forensic investigations. Different methods in forensic odontology based on the correlation between age estimation in adults, from the analysis of the pulp/tooth area, based on the apposition of secondary dentine. The aim of the study was to develop regression models for the dental age estimation by the relation pulp/tooth area, in lower canines in a Chilean sample, using digital peri-apical radiographs (DPR) applying Cameriere's method. We analyzed 212 DPR (86 males and 126 females) mandibular canines through Image J program to measure the pulp/tooth area. Age and sex information was obtained of the DPR's blindly selected. We developed simple linear regression models for age estimation. The coefficient of determination to R33 was R2 age and dental structures have been described. Cameriere et al. proposed a quantitative method for 27.8 % and R2 29.6 % to R44, with a mean absolute error of 11.02 years, to R33 and 10.37 years to R44. ANOVA analysis showed no statistically significant differences for the pulp/tooth relation area of canines according to sex (p> 0.05). According to the results, the Cameriere's et al., method is reliable for dental age estimation according to pulp/tooth ratio in adults. However, in the regression models developed for Chilean population, it can be stated that the adjustment indicated by the coefficients of determination, show uncertainty between the pulp / tooth area and chronological age in lower canines, therefore it is suggested to use additional estimation methods for age in this population.


Assuntos
Humanos , Masculino , Feminino , Adolescente , Adulto , Pessoa de Meia-Idade , Idoso , Adulto Jovem , Dente/anatomia & histologia , Determinação da Idade pelos Dentes/métodos , Radiografia Dentária Digital/métodos , Polpa Dentária/anatomia & histologia , Dente/diagnóstico por imagem , Modelos Logísticos , Chile , Análise de Variância , Polpa Dentária/diagnóstico por imagem , Distribuição por Idade e Sexo , Odontologia Legal
6.
Br Dent J ; 228(5): 318, 2020 03.
Artigo em Inglês | MEDLINE | ID: mdl-32170226
7.
Med. leg. Costa Rica ; 37(1): 162-178, ene.-mar. 2020. tab, graf
Artigo em Espanhol | LILACS | ID: biblio-1098384

RESUMO

Resumen Introducción: El objetivo de la investigación fue evaluar la satisfacción de los usuarios con la atención recibida en la Unidad de Odontología Forense del Departamento de Medicina Legal del Organismo de Investigación Judicial en cuanto a infraestructura, trato recibido y tiempo, durante el segundo semestre del 2018, para la formulación de recomendaciones que contribuyeran con la calidad de los servicios. Materiales y métodos: Mediante un cuestionario se evaluaron las variables: tiempo de atención, trato recibido e infraestructura y se solicitaron datos sociodemográficos de forma anónima en una muestra de 57 personas; el análisis de los datos se efectúo mediante coeficientes de variación, promedios y cruces de variables mediante una base de datos en Excel que fue procesada con SPSS 22. Resultados: El promedio de satisfacción general es de un 1,46% muy insatisfecho, un 0,33% insatisfecho, un 4.02% satisfecho y en la categoría muy satisfecho el valor promedio de la satisfacción total es del 94,19%. El 36% de la muestra corresponde a mujeres y 64% a hombres; el promedio de edad es de 37,2 años, la secundaria es el nivel educativo predominante (44%). El motivo de valoración principal en ambos sexos es la violencia común. La mayoría de los evaluados proviene de la región central y tardan menos de una hora en trasladarse a valoración. (50,9%). Conclusiones: En términos generales, la infraestructura es muy satisfactoria, al igual que el trato recibido; la variable tiempo influye en la disminución del promedio de satisfacción principalmente porque el horario y disponibilidad para la asignación de las citas no satisface a todos los usuarios específicamente a los provenientes de Guanacaste, Puntarenas y Limón que tardan tres horas o más en trasladarse hasta la Ciudad Judicial.


Abstract Introduction: The objective of the investigation was to evaluate the user´s satisfaction with the attention received in the Forensic Dentistry Unit of the Department of Legal Medicine of the Judicial Investigation Agency regarding infrastructure, treatment received and time, during the second semester of 2018, for the formulation of recommendations that will contribute to improve the quality of services. Materials and methods: A direct questionnaire was carried out in which the variables were evaluated: attention time, treatment received and infrastructure; sociodemographic data was requested anonymously in a sample of 57 individuals; the data analysis was carried out by means of variation coefficients, averages and crossings of variables; through a Excel database processed with SPSS 22. Results: The average percentage of overall satisfaction is 1.46% very dissatisfied, 0.33% dissatisfied, 4.02% satisfied and in the very satisfied category the average value of total satisfaction is 94.19%. The 36% corresponds to women and 64% to men; average age is 37.2, high school level was the predominant educational level (44%). The reason for the assessment presented by the highest percentage, in both sexes is common violence. The majority of the individuals come from the central region; the predominant period of displacement is less than one hour (50.9% of respondents). Conclusions: In general terms, the infrastructure is very satisfactory, as is the treatment received, the time variable influences the decrease in the average satisfaction mainly because the time and availability for the appointment assignment does not satisfy all users, specifically those from Guanacaste, Puntarenas and Limón that take three hours or more to travel to the Ciudad Judicial.


Assuntos
Comportamento do Consumidor , Odontologia Legal , Costa Rica , Medicina Legal
8.
Med. leg. Costa Rica ; 37(1): 154-161, ene.-mar. 2020. tab, graf
Artigo em Inglês | LILACS | ID: biblio-1098383

RESUMO

Abstract Background: The evaluation of palatal rugae in human identification is important because these structures can remain intact for up to seven days after death. Aim: To compare the area and density of the palatal rugae between ages groups and genders. Settings and Design: A cross-sectional study. Methods and Material: Dental plaster models obtained from patients at the Orthodontic Clinic of University of Uberaba were selected. Two hundred patients were divided into four groups: Group 1:10-15 years; Group 2:16-30 years; Group 3:31-50 years; and Group 4:51-70 years. The palatal rugae and hard palate of each plaster model were outlined and photographed. The evaluation of the area of the hard palate and palatal rugae was performed using the ImageJ software. Statistical analysis used: Kolmogorov-Smirnov, Kruskal-Wallis, Chi-square and Spearman correlation tests using GraphPad Prism 5 statistical software. Results and conclusión: The areas of the palatal rugae and of the hard palate were significantly smaller in the group 4. There was a significant negative correlation between age and palatal rugae area, and between age and hard palatal area. The present study was the first to demonstrate that patients between 51 and 70 years have a smaller palatal rugae area and a smaller hard palate area when compared to other groups. Thus, the evaluation of the hard palate area and of palatal rugae could be used as an adjunct with other methods to determine the age group of an individual; however studies using larger sample size are needed to validate this observation.


Assuntos
Mudanças Depois da Morte , Palato Duro/diagnóstico por imagem , Odontologia Legal/instrumentação , Anatomia
9.
J Forensic Sci ; 65(2): 481-486, 2020 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-31487052

RESUMO

Staging third molar development is commonly used for age estimation in subadults. Automated developmental stage allocation to the mandibular left third molar in panoramic radiographs has been examined in a pilot study. This method used an AlexNet Deep Convolutional Neural Network (CNN) approach to stage lower left third molars, which had been selected by manually drawn bounding boxes around them. This method (bounding box AlexNet = BA) still contained parts of surrounding structures which may have affected the automated stage allocation performance. We hypothesize that segmenting only the third molar could further improve the automated stage allocation performance. Therefore, the current study aimed to determine and validate the effect of lower third molar segmentations on automated tooth development staging. Retrospectively, 400 panoramic radiographs were collected, processed and segmented in three ways: bounding box (BB), rough (RS), and full (FS) tooth segmentation. A DenseNet201 CNN was used for automated stage allocation. Automated staging results were compared with reference stages - allocated by human observers - overall and per stage. FS rendered the best results with a stage allocation accuracy of 0.61, a mean absolute difference of 0.53 stages and a Cohen's linear κ of 0.84. Misallocated stages were mostly neighboring stages, and DenseNet201 rendered better results than AlexNet by increasing the percentage of correctly allocated stages by 3% (BA compared to BB). FS increased the percentage of correctly allocated stages by 7% compared to BB. In conclusion, full tooth segmentation and a DenseNet CNN optimize automated dental stage allocation for age estimation.


Assuntos
Determinação da Idade pelos Dentes/métodos , Dente Serotino/diagnóstico por imagem , Redes Neurais de Computação , Odontologia Legal/métodos , Humanos , Processamento de Imagem Assistida por Computador , Dente Serotino/crescimento & desenvolvimento , Radiografia Panorâmica , Estudos Retrospectivos
10.
Forensic Sci Int ; 306: 110054, 2020 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-31778924

RESUMO

PURPOSE: To study age estimation performance of combined magnetic resonance imaging (MRI) data of all four third molars, the left wrist and both clavicles in a reference population of females and males. To study the value of adding anthropometric and sexual maturation data. MATERIALS AND METHODS: Three Tesla MRI of the three anatomical sites was prospectively conducted from March 2012 to May 2017 in 14- to 26-year-old healthy Caucasian volunteers (160 females, 138 males). Development was assessed by allocating stages, anthropometric measurements were taken, and self-reported sexual maturation data were collected. All data was incorporated in a continuation-ratio model to estimate age, applying Bayes' rule to calculate point and interval predictions. Two performance aspects were studied: (1) accuracy and uncertainty of the point prediction, and (2) diagnostic ability to discern minors from adults (≥18 years). RESULTS: Combining information from different anatomical sites decreased the mean absolute error (MAE) compared to incorporating only one site (P<0.0001). By contrast, adding anthropometric and sexual maturation data did not further improve MAE (P=0.11). In females, combining all three anatomical sites rendered a MAE equal to 1.41 years, a mean width of the 95% prediction intervals of 5.91 years, 93% correctly classified adults and 91% correctly classified minors. In males, the corresponding results were 1.36 years, 5.49 years, 94%, and 90%, respectively. CONCLUSION: All aspects of age estimation improve when multi-factorial MRI data of the three anatomical sites are incorporated. Anthropometric and sexual maturation data do not seem to add relevant information.


Assuntos
Determinação da Idade pelo Esqueleto/métodos , Determinação da Idade pelos Dentes/métodos , Imagem por Ressonância Magnética , Adolescente , Adulto , Teorema de Bayes , Clavícula/diagnóstico por imagem , Clavícula/crescimento & desenvolvimento , Grupo com Ancestrais do Continente Europeu , Feminino , Antropologia Forense , Odontologia Legal , Humanos , Masculino , Dente Serotino/diagnóstico por imagem , Dente Serotino/crescimento & desenvolvimento , Estudos Prospectivos , Rádio (Anatomia)/diagnóstico por imagem , Rádio (Anatomia)/crescimento & desenvolvimento , Amostragem , Ulna/diagnóstico por imagem , Ulna/crescimento & desenvolvimento , Adulto Jovem
11.
J Forensic Sci ; 65(1): 304-313, 2020 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-31145812

RESUMO

In 1949, the American Graves Registration Service Pacific Zone proposed the identification of 27 sets of remains (skulls/crania/mandibles) based on comparisons with written dental records. All were denied, and the remains were buried as unknowns. In 2003 and 2015, the remains were exhumed by the DPAA. Currently, 26 individuals previously recommended for identification have been positively identified. The DPAA Science Director's opinion corresponded with 24 of their recommendations, while DNA excluded three. Caution should be taken by the forensic scientist when building assemblages through skeletal and dental articulation. The forensic odontologist must always consider variations in restorative care/extraction patterns and the possibility of documentation errors when reviewing/interpreting historical and current day dental records used for AM/PM comparisons. The odontologist should base their opinion on the strength of the antemortem/postmortem comparison, number and type of concordances, and distinct dental care and extraction patterns.


Assuntos
Restos Mortais , Registros Odontológicos , Odontologia Legal/métodos , Amálgama Dentário , Prótese Dentária , Exumação , História do Século XX , Humanos , Mandíbula/patologia , Maxila/patologia , Militares/história , Fotografação , Radiografia Dentária , Dente/patologia , Estados Unidos , II Guerra Mundial
12.
Braz. dent. sci ; 23(3): 1-9, 2020. tab
Artigo em Inglês | LILACS, BBO - Odontologia | ID: biblio-1116230

RESUMO

Objective: This cross-sectional school based study aimed to assess the reliability of Fishman and Nolla methods in predicting the chronological age for Yemeni children. Material and Methods: Orthopantomographs and left handwrist radiographs were taken for 358 Yemeni children (193 boys and 165 girls) 8 - 16 years. Skeletal age estimated by Fishman method and dental age estimated by Nolla method were compared to chronological age using SPSS version 21, statistical significance was predetermined at P < 0.05 , using Intraclass Correlation CoefficientICC and Wilcoxon signed rank test. Results: The mean chronological, skeletal and dental ages were 12.00 ± 2.25 years, 12.39 ± 1.65 years and 11.32 ± 2.65 years, respectively. Intraclass correlation coefficient showed strong correlation between chronological age and skeletal and dental ages. Wilcoxon test showed Fishman method significantly underestimated the chronological age by 0.44 ± 1.26 years in boys and non-significantly underestimated the chronological age by 0.02 ± 1.08 years in girls. Nolla method significantly underestimated the chronological age by 0.59 ± 1.28 years in boys and 0.78 ± 1.21 years in girls. Conclusions: Chronological age of Yemeni children is highly correlated to skeletal age estimated by Fishman method and dental age estimated by Nolla method. However, the two methods underestimate the chronological age of Yemeni children.(AU)


Objetivo: Este estudo transversal de base escolar teve como objetivo avaliar a confiabilidade dos métodos Fishman e Nolla na predição da idade cronológica em crianças iemenitas. Material e Métodos: Foram realizadas ortopantomografias e radiografias do punho esquerdo em 358 crianças iemenitas (193 meninos e 165 meninas) de 8 a 16 anos. A idade esquelética estimada pelo método Fishman e a idade odontológica estimada pelo método Nolla foram comparadas com a idade cronológica pelo, utilizando-se o programa SPSS versão 21; a significância estatística foi predeterminada em P < 0,05, pelo coeficiente de correlação intraclasseICC e pelo teste de Wilcoxon. Resultados: As idades cronológica, esquelética e odontológica média foram de 12,00 ± 2,25 anos, 12,39 ± 1,65 anos e 11,32 ± 2,65 anos, respectivamente. O coeficiente de correlação intraclasse mostrou forte correlação entre idade cronológica e idade esquelética e dentária. O teste de Wilcoxon mostrou que o método Fishman subestimou significativamente a idade cronológica em 0,44 ± 1,26 anos nos meninos e não subestimou significativamente a idade cronológica em 0,02 ± 1,08 anos nas meninas. O método Nolla subestimou significativamente a idade cronológica em 0,59 ± 1,28 anos nos meninos e 0,78 ± 1,21 anos nas meninas. Conclusões: A idade cronológica de crianças iemenitas está altamente correlacionada à idade esquelética estimada pelo método Fishman e à idade dentária estimada pelo método Nolla. No entanto, os dois métodos subestimam a idade cronológica das crianças iemenitas.(AU)


Assuntos
Humanos , Masculino , Feminino , Criança , Adolescente , Ortodontia , Iêmen , Determinação da Idade pelo Esqueleto , Determinação da Idade pelos Dentes , Odontologia Legal
13.
Indian J Dent Res ; 30(5): 687-691, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31854357

RESUMO

Background: Age of a child can be assessed from various parameters such as chronological age, height, weight, secondary sexual characteristics, skeletal age, or dental age. The present study was planned to assess and compare chronological age with dental age (Demirjian's method and Willem's method) and skeletal age (Fishman's method). Materials and Methods: The present study was done on a sample of 100 children in the age group of 9-14 years. The chronological age was computed through the birth certificates and dental age was calculated from their orthopantomograms (OPGs) using Demirjian's and Willem's methods. Hand-wrist radiograph of the left hand was used to compute skeletal age using Fishman's method. Paired t-test and Pearson's correlation coefficients were calculated as a part of statistical analysis at a significance level of P < 0.01. Results: The mean chronological age among the group was 12.37 ± 1.34 years, the mean dental age by Demirjian's method was 12.36 ± 1.72 years, the mean dental age by Willem's method was 12.36 ± 1.51, and the mean skeletal age by Fishman's method was 13.03 ± 1.34 years. Out of the all methods evaluated in the study, Fishman's method of age estimation showed the least value of correlation coefficient (r = 0.728) with the chronological age, whereas Willem's method showed the maximum correlation with the chronological age (r = 0.885). Conclusion: It can be concluded from the present study that the dental age estimation evaluated by the digital OPG by both the methods, that is, Demirjian's method and Willem's method, has shown high accuracy when applied to the children of Faridabad. Skeletal maturation evaluated by Fishman's method using hand-wrist radiographs was found to overestimate the age when compared to chronological age in both the sexes.


Assuntos
Determinação da Idade pelos Dentes , Odontologia Legal , Adolescente , Determinação da Idade pelo Esqueleto , Criança , Humanos , Radiografia , Radiografia Panorâmica
14.
Leg Med (Tokyo) ; 41: 101639, 2019 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-31706234

RESUMO

From a legal and penalty point of view, it is essential to conclude if an individual has reached the legal age (also known as age of majority). Although Cameriere's third molar maturity index (I3M) has been used to discriminate between adults and minors, no study has tested the applicability of I3M in the Eastern Chinese population. The aim of this study was to assess the validity of the region-specific cut-off value of I3M for discriminating minors from adults in an Eastern Chinese population. Five hundred fifty-six subjects (276 males and 280 females) aged 14-24 years participated in this study. A logistic regression analysis was conducted by considering the adult and minor ages as dichotomous dependent variables and I3M and sex as predictor variables. The results showed that sex was not statistically significant in distinguishing adults and minors. The receiver operating curve analysis showed the best performance of the cut-off value of I3M < 0.08 in discriminating adults from minors. Furthermore, the diagnostic test showed the proportion of accuracy was 90.22% in males and 86.43% in females. The sensitivity and specificity for males were 88% and 94.06%, respectively, while those for females were 83.71% and 91.18%, respectively. The estimated Bayes post-test probability was 97.18% and 96.01% in males and females respectively. Therefore, I3M < 0.08 may be a useful tool for indicating the legal age in Eastern Chinese population.


Assuntos
Determinação da Idade pelos Dentes/métodos , Dente Serotino/diagnóstico por imagem , Ápice Dentário/crescimento & desenvolvimento , Raiz Dentária/crescimento & desenvolvimento , Adolescente , Teorema de Bayes , China , Feminino , Odontologia Legal , Humanos , Masculino , Radiografia Panorâmica , Ápice Dentário/diagnóstico por imagem , Raiz Dentária/diagnóstico por imagem , Adulto Jovem
15.
J Forensic Sci ; 64(6): 1698-1706, 2019 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-31674673

RESUMO

During antemortem and postmortem comparison of dental records of carbonized victims, restorations may be part of such records. The objective of this study was to evaluate the effect of heat on the fluorescence behavior of contemporary tooth-colored restorative materials and natural tooth structure when subjected to range of temperatures, using illumination with 405 nm wavelength light. A total of 132 human extracted teeth restored with tooth-colored restorative materials were exposed to heat (200, 500, 900, 1200°C) in an oven for 30 min. Samples were imaged before and after heat treatment. All tooth-colored restorative materials underwent changes in color and in fluorescence properties, at each of the temperatures used. Resin-based restorative materials still fluoresced at 200°C, and at 500°C underwent major color changes due to volatilization of resin. Materials containing inorganic fluorophores still fluoresced at 900°C, while at 1200°C, none of the materials tested in this study showed any fluorescence.


Assuntos
Materiais Dentários , Restauração Dentária Permanente , Fluorescência , Temperatura Alta , Silicatos de Alumínio , Cor , Resinas Compostas , Porcelana Dentária , Odontologia Legal , Cimentos de Ionômeros de Vidro , Humanos , Cerâmicas Modificadas Organicamente , Compostos de Potássio
16.
Forensic Sci Int ; 305: 110032, 2019 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-31704514

RESUMO

INTRODUCTION: The identification of aesthetic dental materials during clinical dental examination can be challenging especially as patients and dental manufacturers place great emphasis on filling materials being as close as possible in appearance to the natural tooth. This makes dental identification in a forensic setting even more complicated. OBJECTIVE: The aim of this study was to develop a simple method using photographic analyses to determine differences in fluorescence and reflectance between brands and shades. METHOD: Three discs of 95 shades of resin composites (n = 285) were produced. Photographs were taken using a digital single-lens reflex (DSLR) camera attached to a dark box illuminated by an ultraviolet (UV) flashlight (wavelength 385 ± 10 nm) in a standardised manner. Images were analysed using an image software. The lightness (L) component according to the CIELAB was recorded. Kruskal-Wallis test was used to compare the mean lightness of the different samples followed by Dunn's test for multiple comparisons. The level of significance was set at P < 0.05. RESULTS: L values ranged from 238.81 to 49.74. Fluorescence and reflectance were categorized according to crescent L values into 5 categories and organized into a Fluorescence and Reflectance Scale. Overall, dentin shades showed similar L values when compared to the same enamel shade from the same manufacturer. Comparison of L values for shades A1E and A3.5E demonstrated that darker shades had lower L values. CONCLUSIONS: UV light allowed the recording of the Lightness component of CIELAB of a composite with little variation between images. The Fluorescence and Reflectance Scale allows the examiner to identify a specific brand or restrict the possibilities down to two brands. This information could help in cases of identification especially when ante-mortem data is limited.


Assuntos
Resinas Compostas , Fluorescência , Odontologia Legal/métodos , Raios Ultravioleta , Humanos , Processamento de Imagem Assistida por Computador , Fotografação
17.
Sud Med Ekspert ; 62(5): 26-32, 2019.
Artigo em Russo | MEDLINE | ID: mdl-31626191

RESUMO

The purpose of the work is to propose categories for the absolute and proportional sizes of all classes of teeth based on their odontometric features. These categories can be used in expert and anthropological practice. The technique is free from subjectivity and allows accurate determination of the sizes and proportions of teeth, regardless of the experience, skills and professional qualifications of the specialist.


Assuntos
Odontologia Legal , Odontometria , Crime , Humanos
18.
Sud Med Ekspert ; 62(5): 39-42, 2019.
Artigo em Russo | MEDLINE | ID: mdl-31626193

RESUMO

In medical literature there is no single detailed standard for studying the biochemical composition of a tooth. This circumstance led to the development of a proprietary method for determining the enantiomers of aspartic acid in hard dental tissues for use in the further study of the relationship between the amino acid composition of dental tissues and the biological age of humans. Dental tissue samples obtained from living individuals aged from 20 to 50 years were studied by chromatography-mass spectrometry. The results of the study allowed us to put forward a number of practical recommendations on the standardization of the procedure for the preparation of dental tissue samples and the parameters of chromatography-mass spectrometry research.


Assuntos
Determinação da Idade pelos Dentes , Ácido Aspártico/análise , Adulto , Cromatografia , Odontologia Legal , Dureza , Humanos , Espectrometria de Massas , Pessoa de Meia-Idade , Manejo de Espécimes/normas , Adulto Jovem
19.
Int J Legal Med ; 133(6): 1967-1976, 2019 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-31471652

RESUMO

Secondary dentine deposition is responsible for the decrease in the volume of the pulp cavity with age. Therefore, the volume of the pulp cavity can be considered as a predictor for estimating age. The aims of this study were to investigate the relationship strength between canine pulp volumes and chronological age from homogenous (approximately equal numbers of individuals in each age range) age distribution and to assess the effect of sex as predictor in age estimation. This study was performed on 719 subjects of Pakistani origin. Cone beam computed tomography images of 521 left maxillary and 681 left mandibular canines were collected from 368 females and 349 males aged from 15 to 65 years. Planmeca Romexis® software was used to trace the outline of the pulp cavity and to calculate pulp volumes. Regression analysis was performed to assess the correlation between pulp volumes considering with and without sex as a predictor with chronological age. The obtained results showed that mandibular canine pulp volume and sex have the highest predictive power (R2 = 0.33). The relationship between mandibular canine pulp volume and sex with chronological age demonstrates an odd S-shaped non-linear relationship. A statistically significant difference in volumes of pulp was found (p = 0.000) between males and females. The conclusion was that predictions using the pulp volume of the mandibular canine and sex produced the best estimates of chronological age.


Assuntos
Determinação da Idade pelos Dentes/métodos , Tomografia Computadorizada de Feixe Cônico , Dente Canino/diagnóstico por imagem , Polpa Dentária/diagnóstico por imagem , Polpa Dentária/crescimento & desenvolvimento , Adolescente , Adulto , Idoso , Feminino , Odontologia Legal , Humanos , Processamento de Imagem Assistida por Computador , Masculino , Pessoa de Meia-Idade , Paquistão , Adulto Jovem
20.
Fa Yi Xue Za Zhi ; 35(4): 406-410, 2019 Aug.
Artigo em Inglês, Chinês | MEDLINE | ID: mdl-31532147

RESUMO

Abstract: Objective To apply Demirjian's and Cameriere's method for dental age estimation of adolescents from Hunan Han nationality, and compare the accuracy of the two methods. Methods A total of 480 orthopantomograms of?8-16 year?old adolescents from Hunan Han nationality?with no special diseases and good nutritional status were collected?by Xiangya Stomatological Hospital of Central South University from January, 2016 to July, 2017, among them 236 males and 244 females. The dental age of each adolescent was determined by Demirjian's method and Cameriere's method, respectively, and the paired t-test of the estimated dental age and the chronological age determined by the two methods was conducted by SPSS 20.0 software to compare the difference between estimated dental age and chronological age. Results Mean chronological age of males and females was 11.91 and 11.88 years, respectively. The estimated dental age determined by Demirjian's method showed an underestimate of chronological age by an average of 0.11 years (males) and 0.15 years (females), while the estimated dental age determined by Cameriere's method showed an underestimate of chronological age by an average of 0.83 years (males) and 0.72 years (females). Conclusion Demirjian's method is more accurate than Cameriere's method in dental age estimation of adolescents from Hunan Han nationality, therefore more suitable for dental age estimation of adolescents in this region.


Assuntos
Determinação da Idade pelos Dentes , Odontologia Legal , Adolescente , Grupo com Ancestrais do Continente Asiático , Criança , China , Grupos Étnicos , Feminino , Humanos , Masculino , Radiografia Panorâmica , Reprodutibilidade dos Testes
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