Development of facial sexual dimorphism in children aged between 12 and 15 years : a three-dimensional longitudinal study

International audienc

Modelling of facial growth in Czech children based on longitudinal data : age progression from 12 to 15 years using 3D surface models

International audienc

Development of facial sexual dimorphism in children aged between 12 and 15 years : a three-dimensional longitudinal study

International audienc

A test of the DSP sexing method on CT images from a modern French sample

International audienc

A test of the DSP sexing method on CT images from a modern French sample

International audienc

A test of the DSP sexing method on CT images from a modern French sample

International audienc

Impact of 3D surface scanning protocols on the Os coxae digital data: implications for sex and age-at-death assessment

The 3D imaging technologies have become of paramount importance for example in disciplines such as forensic anthropology and bioarchaeology, where they are being used more and more frequently. There are several new possibilities that they offer; for instance, the easier and faster sharing of data among institutions, the possibility of permanent documentation, or new opportunities of data analysis. An important requirement, however, is whether the data obtained from different scanning devices are comparable and whether the possible varying outputs could affect further analyses, such as the estimation of the biological profile. Therefore, we aimed to investigate two important questions: (1) whether 3D models acquired by two different scanning technologies (structured light and laser) are comparable and (2) whether the scanning equipment has an effect on the anthropological analyses, such as age-at-death estimation and sex assessment. 3D models of ossa coxa (n = 29) were acquired by laser (NextEngine) and structured light (HP 3D Structured Light Scanner PRO 2) scanners. The resulting 3D models from both scanners were subjected to age-at-death analyses (via the quantitative method of Stoyanova et al., 2017) and sex analyses (via Diagnose Sexuelle Probabiliste 2 of Brůžek et al., 2017). Furthermore, high quality scans of a small sample (n = 5) of pubic symphyseal surfaces with the RedLux Profiler device were acquired as reference surfaces to which the outputs from both scanners were compared. Small deviations between surfaces were more evident in more rugged surfaces (in areas of depression and protrusion). Even though small differences from the reference surfaces were found, they did not have a significant effect on the age and sex estimates. It never resulted in the opposite sex assignment, and no significant differences were observed between age estimates (with the exception of those with the TPS/BE model).Charles University Grant Agency [642218]IRN Bipedal Equilibrium, CNRS, Franceinfo:eu-repo/semantics/publishedVersio

Comparison of methods to determine sex by evaluating the greater sciatic notch: Visual, angular and geometric morphometrics

Sex estimation is the first step for biological profile reconstruction of an unknown skeleton (archaeological or contemporary) and consequently for positive identification of skeletal remains recovered from forensic settings. Several tools have been developed using different osseous structures. With the intention to provide an objective method comparison, we reported the analysis of three different methods (visual, metric and geometric morphometrics) for sex assessment of the greater sciatic notch. One hundred and thirty pelvic bones (45.4% females and 54.6% males) from the National Autonomous University of Mexico Skeletal Collection pertaining to the contemporary Mexican population were analyzed.We used the ROC-analysis to test between desired false positive thresholds (1-specificity) and expected true positive rates (sensitivity) in order to predict the best approach to sex assessment. The comparison of the area under the ROC-curves shows significant differences among visual and metric methods. At the same time, the analysis suggested that higher morphological variation among the sexes is independent of the methodological approach.The results indicate that the metric (angle), with a high percent of indeterminate cases (34.6%), and visual, with 26.2% of the cases allocated as intermediate cases, were poorly accurate; we cannot recommend these techniques for sexing an unknown specimen. On the other hand, the geometric morphometrics approach improves sex estimation in 82.3% of correctly classified individuals with more than 95% of posterior probability.In addition to the method comparison, the major sexual variation of the greater sciatic notch was determined to be located on its posterior border.Fil: Gómez Valdés, Jorge A.. Universidad Nacional Autónoma de México; MéxicoFil: Quinto Sanchez, Mirsha Emmanuel. Escuela Nacional de Antropología e Historia; México. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; ArgentinaFil: Menéndez Garmendia, Antinea. Universidad Nacional Autónoma de México; MéxicoFil: Veleminska, Jana. Charles University; República ChecaFil: Sánchez Mejorada, Gabriela. Universidad Nacional Autónoma de México; MéxicoFil: Bruzek, Jaroslav. Universidad Nacional Autónoma de México; México. Universite de Bordeaux; Franci