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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
171

Sexual dimorphism at the proximal tibia: a geometric morphometric analysis

Toon, Celena 12 March 2016 (has links)
In the past few decades, an area of skeletal research focusing on shape analyses has gained popularity in the field of physical anthropology, and subsequently forensic anthropology. Known as geometric morphometrics, this type of analysis allows the researcher to place the morphological shape of bones into a statistical framework to answer questions on a variety of topics, including sexual dimorphism. Sex assessment from the long bones has been traditionally conducted using traditional morphometric methods (Iscan and Miller-Shaivitz 1984; Steyn and Iscan 1997), and as a result, relies mainly on size differences and has not considered how joint morphology and shape affect sex. For this project, a geometric morphometric analysis of the proximal tibia in a modern Caucasian American population was conducted using a sample of 100 male and 100 female tibiae from the William M. Bass Donated Skeletal Collection at the University of Tennessee at Knoxville. The proximal tibia's effectiveness as an indicator of sex in a modern American population was evaluated via generalized Procrustes, principal components, and discriminant function analyses. Principal components revealed a lack of separation between males and females in terms of proximal tibia shape. The discriminant function analysis was successful at discriminating males from females, but cross-validation yielded a low total accuracy rate of 58%. The shape of the proximal tibia contributes to sexual dimorphism in a Caucasian American population, but is only slightly useful in a discriminant function. Further research should be conducted on different populations and using different skeletal landmarks.
172

Determining the presence of secular change using geometric morphometrics: an analysis of the craniofacial morphology in South African European males of the Raymond A. Dart and Pretoria Skeletal Collections

Fu, Carissa Angela 12 March 2016 (has links)
The use of geometric morphometrics (GM) in physical anthropology has increased markedly over the recent years. In current studies of secular change, anthropologists have more frequently turned to this technique as it provides scientists with a powerful tool for shape analysis. Secular change is defined as changes in the skeletal biology, usually seen in a population, resulting from shifts in living standards or exposure to a new environmental factor over a short timeframe (Jantz and Meadows Jantz 2000; Weisensee and Jantz 2011). Studies conducted in Europe, Asia, and the United States have shown significant signs of secular change in craniofacial morphology. This thesis will utilize GM analyses of 57 craniofacial landmarks from 313 individuals to determine secular change in the European male populations of the Raymond A. Dart and Pretoria Skeletal Collections located in Johannesburg and Pretoria, South Africa, respectively, with birth years ranging from 1850 to 1956. Craniofacial data points were collected using a 3D Microscribe digitizer, upon which the Generalized Procrustes Analysis (GPA) was used to align all landmarks into one coordinate reference plane. In order to determine the presence of shape change, a Principal Components Analysis (PCA) was run on the Procrustes coordinates of all individuals. Then, a multivariate regression of shape score on year of birth was conducted to determine the magnitude of change as explained over time. Following the multivariate regression, various Canonical Variates Analyses (CVA) were performed to determine whether secular change was occurring. In addition to collecting metric data, ultimate and proximate causes are explored to provide a more holistic understanding of the potential reasons for the changing or unchanging nature of the crania in the ancestrally European South African population. This study hypothesizes these collections will exhibit craniofacial secular change resulting from greater exposure to increased nutrition over time, greater access to healthcare, and socioeconomic and political stability. Additionally, genetic factors could be affecting the development of the crania through time. As many studies use the Dart and Pretoria collections in tandem to understand population-specific traits of modern South Africans, the presence of secular change will greatly affect the way researchers utilize samples for their studies. Forensic anthropologists study collections to create better estimations for elements of the biological profile such as stature, age, and sex. However, failure to take into account secular change would provide erroneous results. This study provides answers regarding the need to account for secular change if necessary. This research indicates that there are some changes occurring in the craniofacial morphology as see by the PCA, but the results of the CVA indicate that this is not necessarily due to secular change. The results do not clearly indicate the presence of secular change. There are many possibilities dictating potentially why. The first possibility is that there are small changes occurring in the craniofacial morphology; however, this is not caused by secular change. There are other variables, potentially genetic, that are influencing these slight changes that we see. Despite other nations with similar economic development trajectories experiencing a definite presence of secular change, the unique history and population structure of European South Africans could be contributing to the lack of secular change present. Another possible reason is the lack of passage of time from the industrialization of the nation. Furthermore, there is potentially not enough data tested to warrant a reliable conclusion that secular change is or is not occurring. With the cranium, the possibility exists that a minimum threshold of specimens is needed in order to have a reliable conclusion.
173

The reproducibility of incomplete skulls using freeform modeling plus software

Gentiluomo, Gina Marie 12 March 2016 (has links)
As early as 1883, forensic artists and forensic anthropologists have utilized forensic facial reconstruction in the attempt to identify skulls from decomposed remains. Common knowledge dictates that in order to complete identification from the skull with facial reconstruction, the splanchnocranium (also known as the viscerocranium or facial portion of the skull) needs to still be intact. However, there has been very little research conducted (Colledge 1996; Ismail 2008; Wilkinson and Neave 2001) to determine the minimal amount of intact skull that can be present for a reconstruction to still be possible and accurate. Accordingly, in the present study, the researcher attempted to prove that a skull with significant damage to the splanchnocranium could be repaired and facially reconstructed to bear a likeness to the original skull and face. Utilizing FreeForm Modeling Plus Software, version 11.0 (Geomagic Solutions - Andover, MA), in conjunction with the Phantom Desktop Haptic Device (Geomagic Solutions - Andover, MA), five CT scans of males between 19 and 40 years old and of varying ethnicities (four Caucasian and one Asian) were digitally altered to present significant skull damage to the splanchnocranium. The hard tissue digital images were repaired using the same software mentioned above and template skulls (i.e., superfluous CT scanned skulls of similar age, sex, and ancestry). The soft tissue digital images were facially reconstructed also utilizing the same software mentioned above and by following basic tissue depth charts/placement rules and guidelines for feature reconstruction. The reconstructed images were compared to their original CT scans in a side-by-side comparison. Assessors were given a rating scale rubric to fill out that asked them specific questions pertaining to both certain facial features and overall similarity between the original and reconstructed images. Two of the reconstructions each ranked an overall 29% "close resemblance" to their original counterparts, one was ranked an overall 71% "no resemblance" to its original counterpart, and the other three fell somewhere in the middle ("slight" or "approximate") in the rating scale. The results reflected a number of issues related to this project (i.e., the researcher's lack of artistic skill) and to facial reconstruction in general (i.e., tissue depth measurement charts) and showed that while it is not impossible to reconstruct skulls that had been damaged in some capacity, the accuracy of the resulting facial reconstruction is questionable. Future studies would benefit from using an artist to reconstruct the images rather than someone with little to no experience in the field, a larger sample size consisting of one ancestry to avoid the cross-race effect, a comparison of the original skull to the repaired one utilizing Geomagic Qualify (Geomagic Solutions - Andover, MA) to glean an overall view of the project's accuracy, and utilization of a photo lineup as the method of comparison in addition to a side-by-side comparison to give a more realistic feel to the comparison process.
174

Validation study of the proposed seventh phase of the Suchey-Brooks age estimation method for the pubic symphysis

Cloven, Jasmine M. 12 March 2016 (has links)
The Suchey-Brooks (1990) method for estimating adult age-at-death from the pubic symphysis is widely used and popular among forensic anthropologists. While this technique is quite accurate, it yields wide age interval estimates and is imprecise for individuals aged over fifty years at death. Berg (2008) and Hartnett (2010a) each altered Brooks and Suchey's phase descriptions and added a seventh phase with the goal of increasing precision while maintaining accuracy, especially for older individuals. The hypothesis for this validation study states that the new methods improve the existing Suchey-Brooks method. A total of 384 White Americans (n=213 males and 171 females) aged 26-97 years at death were analyzed at the William M. Bass Donated Skeletal Collection at the University of Tennessee, Knoxville using all three methods. Descriptive statistics, percentages of "correct" age estimates, inaccuracy and bias scores, and rates of inter- and intra-observer agreement were calculated and compared across the three methods. The Hartnett and Suchey-Brooks methods yielded similar percentages of correct estimates for males (85.0% and 84.5% correct, respectively, using ±2 standard deviations from the phase means), although the Hartnett method was significantly less inaccurate (p<0.001) and biased (p<0.001). The Suchey-Brooks method yielded the highest percentage of "correct" estimates for females aged less than sixty years (100.0% using ±2 standard deviations or 83.1% using ±1 standard deviation) and was significantly less inaccurate (p<0.001) and biased (p<0.001) than the Hartnett and Berg methods. The Hartnett and Berg methods were both significantly (p<0.001) less inaccurate and biased than the Suchey-Brooks method for females aged over sixty years, but Hartnett's and Berg's scores were not significantly different from each other (p=0.496 inaccuracy, p=0.066 bias). The Berg method yielded the highest percentage of "correct" estimates for females aged greater than sixty years (90.2% using ±2 standard deviations or 54.5% using ±1 standard deviation). The results of the present study were similar to those obtained by Merritt's (2014) validation study of Hartnett (2010a, b), although Merritt's rates of intra-observer agreement were substantially higher than those calculated for the present study. The hypothesis for the present study was supported.
175

The estimation of body mass from human skeletal remains

St. George, Karen R. Bottenfield 08 April 2016 (has links)
The ability to estimate body mass from human skeletal remains with a high degree of accuracy would be significant for the identification of identifying unknown individuals in a forensic anthropology context, documenting secular change in modern populations, and evaluating any prevalence in prehistoric populations. Modern research investigating body mass incorporates one of two models: morphometric and biomechanical. The morphometric model views the body as a cylinder, where weight estimates are gathered from extreme points such as the breadth of the pelvis. In contrast, the biomechanical model incorporates engineering principles and biology to understand the effects of mass on the human skeleton. Only the biomechanical model can accommodate extremes in body mass, such as those exhibited by modern populations. This study examined the accuracy of estimating body mass (obesity in particular) from human skeletal remains using a suite of traits shown to be significant in previous studies, including documented biomechanical analysis of obese individuals involving gait and sit-to-stand (STS) movements. It was hypothesized that using a combination of methods, body mass could be estimated with a high degree of accuracy. Using a large skeletal sample (n = 191), composed of male and females with documented age, weight, and height, the following three variables were examined: (1) the spinal manifestation of diffuse idiopathic skeletal hyperostosis (DISH), (2) osteoarthritis (OA) of the tibiae, and (3) external femoral dimensions. These were then subject to statistical tests. Spearman's rank-order correlation and Mann-Whitney U tests showed significant relationships between DISH and obesity in females (p<.05), but not for males. The presence and severity of OA of the medial condyles were also significantly related to BMI in females (p<.05). In males, the relationship between BMI and OA was only significant on the condyles of the right tibiae (p<.05). Finally, ANOVA and Pearson's product-moment correlation tests were performed to evaluate the cross-sectional dimensions of the femur. The effect of age, stature, and BMI were also examined. ANOVA results showed a significant effect between BMI and M-L cross-sectional dimensions among both sexes (p<.05). Initial Pearson's tests performed separately on males and females showed no significant correlations; however, after the sexes were pooled, small to moderate negative correlations between the M-L/A-P ratio along the diaphysis of the femur and BMI were found. Finally, multiple regression analyses were performed. The models for both sexes with all ten variables was statistically significant for BMI. The final accuracy rate was 78.48% for females and 84.37% for males. The primary goal of this study was to evaluate Moore's (2008) body mass estimation study. In this investigation, however, all dimensions of the femur were performed using an osteometric board and sliding calipers following the guidelines used by Agostini and Ross (2011). The results of this study paralleled many of the observations seen in previous studies, particularly the M-L lateral widening of the femur. Future research should continue to examine the relationship of DISH and OA with body mass, particularly regarding the varying manifestations between the sexes and confounding factors such as age.
176

An analysis of sexual dimorphism using geometric morphometrics of the femur and tibia: the use of GM in assessing sex of fragmented remains

Costello, Amanda 08 April 2016 (has links)
This project analyzes the sexual dimorphism of the femur and tibia using geometric morphometrics. The study sample includes 250 individuals of known sex and age at death with complete, non-damaged, non-pathological skeletal remains from the William M. Bass Donated Skeletal Collection at the University of Tennessee, Knoxville. Ages range from 19-96 for males (mean=56.92 years) and 29-97 for females (mean=59.48 years). A combination of landmarks and semi-landmarks were collected on the proximal and distal epiphyses of each bone using a Microscribe, which helps capture the overall size and shape variation present in the sample. Only individuals from one population, White, where analyzed in order to eliminate population variation bias. Classification rates for males and females for the proximal femur were 80.8% and 78.4% respectively, for the distal femur 92.6% and 89.6% respectively, for the proximal tibia 80.8% and 83.2% respectively, and the distal tibia 81.6% and 80.8% respectively, all with a p<0.0001. These rates created a classification model for which epiphysis gave the most accurate assessment of sex: the distal femur, followed by the proximal tibia, then the distal tibia, and lastly the proximal femur. This study indicates the knee joint is the most dimorphic, followed by the ankle and then the hip. The results fall in line with another study indicating the knee is more sexually dimorphic in a modern White population (Spradley and Jantz 2011), though in contrast to their results this study found the distal femur was more dimorphic than the proximal tibia. This method indicates that in comparison to standard measurements, geometric morphometrics may provide a more reliable method for sex estimation when used, specifically on the knee. Certain landmarks were then selected based on the standard taphonomic process of coffin wear and postmortem damage (Pokines and Baker 2014) for exclusion to determine the usability of the method on fragmented or damaged skeletal remains. When combinations of landmarks were removed, the distal femur still possessed the highest classification rates with over 80% accuracy.
177

The effects of household corrosive substances on restored and non-restored teeth

Trapp, Brittany Megan 03 July 2018 (has links)
A gap in the literature exists regarding the chemical effects of household acids at different concentrations on restored and non-restored dentition. The present study examines the effects of household corrosive products on human dentition. A total of 105 adult teeth consisting of restorations composed of silver amalgam, porcelain-fused-to-metal crowns, and teeth lacking restorative material were used. The household products utilized were hydrochloric acid (Clorox® Bleach Cleaner and The Works® Toilet Bowl Cleaner) and sulfuric acid (Drano® Drain Opener and Watchdog® Battery Acid), along with one control base (Biz® Detergent). Teeth were radiographed before and after exposure to the products and were removed from the solutions after 1, 2, 4, 8, 24, 72, 120 and 264 hours. Documentation included weight, mesiodistal and buccolingual crown measurements, ordinal scoring of alterations, and photography. The results indicate 86% of the teeth could be positively identified by radiographs after exposure. Hydrochloric acid had the most destructive effects to teeth without restorations and those with silver amalgam restorations but had a minimal effect on the porcelain-fused-to-metal samples. Sulfuric acid minimally altered the restored teeth and deteriorated some parts of the enamel and dentin of the non-restored samples. Exposure to the detergent resulted in no change. A logistic regression analysis was conducted to determine if there was statistical relevance in acid type, acid concentration, and the type of restoration of the tooth. Results indicate that acid type, acid concentration and the type of restoration are all statistically relevant for positively identifying an individual through radiographs. The results of this study demonstrate that various household corrosive substances can affect the morphology of teeth, and in some cases, destroy teeth, which could mask the identification of an individual. However, the porcelain-fused-to-metal crowns were minimally affected by corrosive agents and can therefore be used for positive identifications.
178

Mensuração da espessura de tecidos moles faciais de crianças e adolescentes brasileiros /

Kuhnen, Barbara. January 2018 (has links)
Orientador: Monica da Costa Serra / Resumo: Na sociedade, a identificação humana é indispensável tanto por razões legais como humanitárias. Porém, existem situações em que corpos encontrados não são passíveis de reconhecimento ou quando não há suspeição, impossibilitando a identificação. Nesses casos, análises antropológicas são de extrema importância, pois permitem estabelecer o perfil biológico do sujeito. Assim, realiza-se a Reconstrução Facial Forense (RFF) para possibilitar o reconhecimento e levar a uma possível identificação. A RFF, para ser realizada, precisa dos valores das espessuras de tecidos moles faciais (ETMF) em diversos pontos craniométricos. Essas medidas servem como guia para se estabelecer um limiar do contorno da face e podem ser influenciadas por diferentes fatores como sexo, ancestralidade, idade e índice de massa corporal (IMC). Não há na literatura tabelas de ETMFs de crianças e adolescentes brasileiros, para auxiliarem na RFF. O objetivo desse trabalho foi realizar a mensuração da espessura de tecidos moles de crianças e adolescentes brasileiros, a partir de dados de imagens de Tomografias Computadorizadas de Feixe Cônico (TCFC) de indivíduos vivos, considerando-se as variáveis sexo, idade, cor da pele e índice de massa corporal. Neste estudo, foram mensurados os 21 pontos craniométricos pré- determinados por meio do software Osírix Lite, de imagens de TCFC da região de cabeça e pescoço de 103 não adultos brasileiros (39 crianças e 64 adolescentes), obtidas junto aos arquivos de imagens de uma... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: In society, human identification is indispensable both for legal and humanitarian reasons. However, there are situations in which bodies found are not recognizable or when there is no suspicion, making identification impossible. In these cases, anthropological analyzes are extremely important, since they allow to establish the biological profile of the subject. Thus, Forensic Facial Reconstruction (FFR) is performed to enable recognition and lead to a possible identification. The RFF, to be performed, needs the values of facial soft tissue thicknesses (FSTT) at several craniometric points. These measures serve as a guide to establish a threshold of the face contour and can be influenced by different factors such as sex, ancestry, age and body mass index (BMI). There are no tables in the literature of FSTTs of Brazilian children and adolescents, to assist in FFR. The objective of this study was to measure the thickness of soft tissues of Brazilian children and adolescents, based on data from Cone-Beam Computed Tomography (CBCT) images of living individuals, considering the variables gender, age, skin color and body mass index. In this study, 21 pre-determined craniometric points were measured using the Osírix Lite software, from head and neck CBCT images of 103 non-Brazilian adults (39 children and 64 adolescents), obtained from the image files of a Clinic of Radiology and Dental Documentation located in the city of Araraquara - SP. According to the obtained results, there wer... (Complete abstract click electronic access below) / Mestre
179

Mensuração da espessura de tecidos moles da face de indivíduos brasileiros adultos /

Barros, Franciéllen de. January 2018 (has links)
Orientador: Clemente Maia da Silva Fernandes / Resumo: A Reconstrução Facial Forense (RFF) é uma técnica das Ciências Forenses que possibilita o reconhecimento de um indivíduo, a partir da modelagem dos contornos dos tecidos faciais sobre um crânio encontrado sem identificação. Para isto é necessário ter o conhecimento da espessura dos tecidos moles faciais (ETMFs) que recobrem os pontos craniométricos no crânio subjacente, pois os mesmos são utilizados como base para a obtenção do contorno facial. Fatores como sexo, ancestralidade, idade, e índice de massa corporal (IMC) influenciam tais espessuras. O objetivo deste estudo foi mensurar ETMFs de sujeitos brasileiros adultos vivos, a partir de imagens de tomografia computadorizada de feixe cônico (TCFC), considerando-se as variáveis sexo, cor de pele, idade e índice de massa corporal. Foram efetuadas mensurações de 21 pontos craniométricos de referência através do uso do software Osirix Lite. Um total de 92 imagens foram analisadas (62 de sujeitos do sexo feminino e 30 do sexo masculino). Os resultados obtidos mostraram que os homens, na maioria das vezes, apresentaram espessuras de tecidos moles faciais maiores do que as mulheres. Em relação às outras variáveis, houve interação com o sexo a cor de pele nos pontos glabela, nasion, infradentale, eminência frontal, supraorbital e linha oclusal, mas nos pontos eminência mentoniana e suborbital a significância foi correspondente à cor da pele. O IMC não evidenciou interação com o sexo, porém, nos pontos filtro médio e supradentale, os... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: Forensic Facial Reconstruction (FFR) is a Forensic Science technique that enables the recognition of an individual, from modeling the contours of facial tissues on a skull found without identification. For this, it is necessary to know the thickness of the facial soft tissue that covers the craniometric points in the underlying skull, since they are used as the basis for obtaining the facial contour. Factors such as sex, ancestry, age, and body mass index (BMI) influence such thicknesses. The objective of this study was to measure the facial soft tissue thickness (FSTT) of living adult Brazilian subjects using cone beam computed tomography (CBCT) images, considering the variables sex, skin color, age and body mass index. Twenty-one reference craniometric points were measured using the Osirix Lite software. A total of 92 images were analyzed (62 females and 30 males). The results showed that men, for the most part, had greater facial soft tissue thicknesses than women. In relation to the other variables, there was interaction with the skin color at the glabella, nasion, infradentale, frontal eminence, supraorbital and occlusal lines, but at the eminence points of the chin and suborbital the significance was corresponding to the color of the skin. The BMI did not show interaction with the sex, however, in the medium and supradentale filter points, the men presented higher values of thickness, independently of the BMI. At the remaining points, only BMI influenced the thickness o... (Complete abstract click electronic access below) / Mestre
180

Reconstrução facial forense: comparação entre tabelas de espessuras de tecidos moles faciais / Forensic facial reconstruction: comparison of facial soft tissue thicknesses data

Lara Maria Herrera 15 February 2016 (has links)
As Ciências Forenses empregam a técnica de Reconstrução Facial buscando aumentar as possibilidades de reconhecimento humano. Após análise antropológica, a face é esculpida sobre o crânio esqueletizado e divulgada na mídia. Existem várias metodologias para a modelagem do rosto e das características da face, bem como vários dados de espessuras de tecidos moles que auxiliam no contorno facial. Com o intuito de investigar se existe uma metodologia que favoreça mais reconhecimentos e que permita uma maior semelhança com o indivíduo, este trabalho buscou comparar reconstruções faciais manuais feitas com duas abordagens para o preenchimento dos tecidos moles (métodos Americano e de Manchester) e para a predição dos olhos, nariz, boca e orelhas. Também buscou comparar reconstruções realizadas com quatro tabelas de espessuras de tecidos moles, desenvolvidas para brasileiros por estudos prévios, observando a possibilidade de unir esses dados para auxiliar na reconstrução. Um quarto objetivo foi averiguar se existe influência do sexo e do conhecimento anatômico ou forense na frequência de reconhecimentos. O estudo foi dividido em duas fases. Na primeira, duas reconstruções foram realizadas para dois indivíduos alvos (um homem e uma mulher) com os métodos Americano e de Manchester, aplicando dois guias para olhos, nariz, boca e orelhas. As reconstruções foram avaliadas por quarenta indivíduos (homens e mulheres, divididos em 4 grupos - alunos de graduação em Odontologia que não passaram pela disciplina de Odontologia Legal, alunos de graduação em Odontologia que passaram pela disciplina, especialistas em Odontologia Legal e indivíduos que não possuíam conhecimento de anatomia humana) por meio dos testes de reconhecimento e semelhança. Para o alvo feminino, as frequências de reconhecimentos foram 20% e 10% para os métodos Americano e de Manchester, respectivamente; para o alvo masculino, as frequências foram 35% e 17,5%. Em relação à semelhança, as medianas foram menores que 3 (em uma escala de 1 a 5); entretanto, foi verificada uma exceção para a escultura feita com o método Americano para o alvo masculino, a qual apresentou mediana 3. Na segunda fase, reconstruções faciais para quatro alvos (dois homens e duas mulheres) foram obtidas com o método Americano, considerando as quatro tabelas de espessuras de tecidos moles para brasileiros. Dezesseis reconstruções foram avaliadas por cento e vinte indivíduos, também pelos testes de reconhecimento e semelhança. Assim como na fase I, foram considerados o sexo e o grupo dos avaliadores. Para o alvo 1, as proporções de acertos são significativamente maiores para reconstruções feitas com as tabelas de cadáveres (44% e 38%) em relação às com os dados de exames de imagem. Para o alvo 4, as proporções de acertos com os dados de cadáveres (Tedeschi-Oliveira et al.) e com os de ressonância magnética foram significativamente maiores comparados às reconstruções com dados de tomografias computadorizadas. Em relação à semelhança, somente o alvo 1 mostrou diferenças significativas de frequências de semelhança leve entre reconstruções. Além disso, não houve influência nem do sexo, nem do conhecimento de anatomia nas frequências de reconhecimentos corretos. Espera-se que a tabela proposta possa ser empregada para a população brasileira. / Forensic Sciences employ Forensic Facial Reconstruction technique to increase possibilities in human recognition. After anthropological analysis, the face can be created on the skeletonized skull and published in the media. There are several methodologies for facial modeling and facial features as well as multiple soft tissue thicknesses data that aid in facial contour. In order to investigate whether a methodology allows more recognition and greater resemblance to a person, this study aimed to compare manual facial reconstructions made with two approaches of filling facial soft tissue (American and Manchester methods) and two approaches to predict the eyes, nose, mouth and ears. This study also intended to compare facial reconstructions carried out with four Brazilian soft tissue thicknesses data, that were developed by previous studies considering the possibily of merging these data for Forensic Reconstruction purpose. A fourth aim was to determine whether sex and anatomical or Forensic knowledge of assessor can influence in frequency of recognition. This study was divided into two phases. In the first phase, two reconstructions were performed for two targets (one male and one female) with American and Manchester methods and applying two guides for eyes, nose, mouth and ears. The reconstructions were evaluated by forty assessors (both sex, divided into four groups - undergraduated students in dentistry who did not study Forensic Dentistry, undergraduated students in dentistry who have gone through the subject of Forensic Dentistry, experts in Forensic Dentistry and individuals who did not have knowlegde of human anatomy) through the recognition and resemblance tests. For female target, frequencies of recognitions were 20% and 10% for American and Manchester methods, respectively; for male target, frequencies were 35% and 17.5%, with significant differences between the proportions of correct responses. Regarding resemblance rates, medians were less than 3 (on a scale from 1 to 5); however, it was found an exception for the sculpture made with the American method for male target, which had median 3. Thus, American method was used for the reconstructions of phase II. In this second phase, facial reconstructions for four targets (two male and two female) were obtained with the American method, considering the four Brazilian soft tissue thicknesses data. Sixteen facial reconstructions were evaluated by a hundred and twenty assessors, also through the recognition and resemblance tests. As in phase I, it was considered the sex and the group of assessors. For the first target, ratios were significantly higher for reconstructions made with data obtained from cadavers (44% and 38%) compared with those obtained from imaging. For the target 4, the proportion of correct responses with data from cadavers (Tedeschi-Oliveira et al.) and from Magnetic Resonance Imaging were significantly higher compared to reconstructions with data from Computer Tomographic scans data. Regarding resemblance, only target 1 showed significant differences in frequency of slight resemblance between reconstructions. In addition, nor sex, nor the knowledge of human anatomy from assessor has influenced the frequency of correct responses. It is also expected that the proposed table be employed for Brazilians.

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