Mensagem dos Autores

Motivados pelo desenvolvimento da Odontologia Legal no Brasil, os autores tiveram a iniciativa de agregar mais uma ferramenta de convergência da classe pericial odontológica com o intuito de divulgar notícias, eventos, trabalhos científicos, além de contribuir para a discussão e troca de experiências entre os praticantes da perícia odontolegal. Contamos com todos para tornarmos este Blog um centro de encontro e de crescimento profissional.







quinta-feira, 27 de dezembro de 2012

The evolution and development of cranial form in Homo sapiens



Abstract
Despite much data, there is no unanimity over how to define Homo sapiens in the fossil record. Here, we examine cranial variation among Pleistocene and recent human fossils by using a model of cranial growth to identify unique derived features (autapomorphies) that reliably distinguish fossils attributed to ‘‘anatomically modern’’ H. sapiens (AMHS) from those attributed to various taxa of ‘‘archaic’’ Homo spp. (AH) and to test hypotheses about the changes in cranial development that underlie the origin of modern human cranial form. In terms of pattern, AMHS crania are uniquely characterized by two general structural autapomorphies: facial retraction and neurocranial globularity. Morphometric analysis of the ontogeny of these autapomorphies indicates that the developmental changes that led to modern human cranial form derive from a combination of shifts in cranial base angle, cranial fossae length and width, and facial length. These morphological changes, some of which may have occurred because of relative size increases in the temporal and possibly the frontal lobes, occur early in ontogeny, and their effects on facial retraction and neurocranial globularity discriminate AMHS from AH crania. The existence of these autapomorphies supports the hypothesis that AMHS is a distinct species from taxa of ‘‘archaic’’ Homo (e.g., Homo neanderthalensis). Article published in:  PNAS, February 5, 2002; 99(3): 1134–1139.
Author: danlieb@fas.harvard.edu 

sexta-feira, 21 de dezembro de 2012

Anatomical variations in the permanent mandibular canine: forensic importance




Abstract.
Introduction: The uniqueness of dental morphology plays an important role in Forensic Odontology, especially for human identifications, in which a single tooth can provide information  for dental identification. Objective: To address the importance of a permanent lower canine with two roots for dental identification 
considering the internal and external morphology of the canine roots. Case report: To report a forensic case in which a two-rooted permanent lower canine was found in a decomposed human body. Conclusion: Although the victim was not identified by the dental parameter, it was observed that this type of morphological variation is of little incidence in some populations, therefore constituting a valuable tool for dental human identifications. Article published in: RSBO. 2012 Oct-Dec;9(4):468-73.
Author: rhonanfs@terra.com.br 

domingo, 9 de dezembro de 2012

Comparative study among Dentistry undergraduates and Forensic Odontology postgraduate students through smile photographs for human identification


Abstract.

Introduction: The execution of forensic odontology technique for human identification depends on the existence of dental files produced ante-mortem (dental records, clinical notes, radiographs or dental casts). However, when these are not present, other sources of dental data should be searched, such as photographs of the smile. Objective: To compare the performance of undergraduates of Dentistry and postgraduate students of Forensic Odontology to execute human identification through the analysis of photographs of the smile based on decisive dental parameters. Material and methods: Forty Dentistry undergraduates of a School of Dentistry (20 presenting history of orthodontic treatment and 20 without treatment were photographed as follows: 1) extraoral photograph of posed smile, at frontal position and; 2) intraoral photograph, at frontal position. Using these 40 pairs of photographs, four tests were prepared (A, B, C and D) which were sent to both 12 undergraduates of Dentistry and 12 postgraduate students of Forensic Odontology both from another School of Dentistry. The examiners should analyze and correlate a picture randomly and previously selected (photograph of the smile or intraoral photograph) with its corresponding one (photograph of the smile or intraoral photograph), which was set in a showcase composed by 10 images, by pointing out the main criteria for reaching a final conclusion. Results: All the subjects of the research, in both groups, correctly answered to test A (analysis of a photograph of the smile in a group of 10 intraoral photographs). The tests B (analysis of an intraoral photograph in a group of 10 photographs of the smile) and D (analysis of a photograph of the smile in a group of 10 intraoral photographs) had 91.6% success among postgraduate students; and test C (analysis of an intraoral photograph in a group of 10 photographs of the smile) had 83.3% success among undergraduate students. Conclusion: Among the most relevant parameters to achieve the result of Forensic dentistry identification through the analysis of photographs of the smile, the morphology of the incisal edges of anterior teeth was the aspect most often cited by both undergraduate students (83.3%) and postgraduate students (72.9%), within the 48 tests applied to each group. Most of the Dentistry undergraduates and Forensic Odontology postgraduate students were capable of performing the human identification through the analysis of photographs of the smile, considering the wide variety of potentially demonstrable dental characteristics of the anterior teeth. Article published in: RSBO. 2012 Oct-Dec;9(4):407-15.


Author: rhonanfs@terra.com.br .

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