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"Osteology"
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Case studies in forensic anthropology : bonified skeletons
\"Through a set of unique cases presented by a diverse international group of practicing forensic anthropologists, Case Studies in Forensic Anthropology seeks to prepare students and professionals for future cases they may confront\" Provided by publisher.
Book
Introducing 3D printed models of fractures in osteology learning improves clinical reasoning skills among first-year medical students: a pilot study
Background
The human bone anatomy is commonly taught using normal adult bones. However, students often face difficulties comprehending the clinical correlations related to fractures, as they only rely on text content or diagrams without three-dimensional visual aids. Therefore, this study aims to evaluate the effectiveness of using 3D-printed models of limb bone fractures in routine osteology classes to enhance the clinical reasoning skills of first-year medical undergraduate students.
Methodology
In this experimental study, 105 first-year medical undergraduate students were divided into intervention and control groups based on their pre-assigned serial numbers. The control group was taught using dry adult human bones, with the teacher explaining clinical correlations verbally. Meanwhile, in two sessions, the intervention group was taught using 3D-printed models of fractures in addition to real bones. At the end of the second session, students were evaluated for their clinical reasoning ability using a case-based MCQ test (maximum score 5). The scores were compared between the two groups using an unpaired t-test. Students of the intervention group were asked to rate their learning experience using a 10-point Likert Scale questionnaire.
Results
The intervention group scored significantly higher (2.54 ± 1.15) than the control group (2.04 ± 0.94) (
p
= 0.015). The maximum score for both groups was five, and the minimum was one. Most students agreed that the 3D-printed models helped them understand the fractures’ clinical relevance and provided better orientation to the bones, joints, and structures involved in fractures (92%,
n
= 46). The students expressed a desire for more similar types of sessions.
Conclusion
Incorporating 3D-printed models of fractures was a novel approach to help students comprehend the clinical correlations. This strategy improved students’ clinical reasoning skills in the intervention group, as evidenced by their higher scores and feedback. Therefore, 3D-printed models are a valuable addition to the traditional teaching methods of learning osteology.
Journal Article
Ned Kelly under the microscope : solving the forensic mystery of Ned Kelly's remains
Ned Kelly was hanged at the Old Melbourne Gaol on 11 November 1880, and his body buried in the graveyard there. Many stories emerged about his skull being separated and used as a paperweight or trophy, and it was finally put on display at the museum of the Old Melbourne Gaol - until it was stolen in 1978. It wasn't only Ned Kelly's skull that went missing. After the closure of the Old Melbourne Gaol in 1929, the remains of deceased prisoners were exhumed and reinterred in mass graves at Pentridge Prison. The exact location of these graves was unknown until 2002, when the bones of prisoners were uncovered at the Pentridge site during redevelopment. This triggered a larger excavation that in 2009 uncovered many more coffins, and led to the return of the skull and a long scientific process to try to identify and reunite Ned Kelly's remains.
Book
Osteoimmunology: A Current Update of the Interplay Between Bone and the Immune System
Immunology, already a discipline in its own right, has become a major part of many different medical fields. However, its relationship to orthopedics and trauma surgery has unfortunately, and perhaps unjustly, been developing rather slowly. Discoveries in recent years have emphasized the immense breadth of communication and connection between both systems and, importantly, the highly promising therapeutic opportunities. Recent discoveries of factors originally assigned to the immune system have now also been shown to have a significant impact on bone health and disease, which has greatly changed how we approach treatment of bone pathologies. In case of bone fracture, immune cells, especially macrophages, are present throughout the whole healing process, assure defense against pathogens and discharge a complex variety of effectors to regulate bone modeling. In rheumatoid arthritis and osteoporosis, the immune system contributes to the formation of the pathological and chronic conditions. Fascinatingly, prosthesis failure is not at all solely a mechanical problem of improper strain but works in conjunction with an active contribution of the immune system as a reaction to irritant debris from material wear. Unraveling conjoined mechanisms of the immune and osseous systems heralds therapeutic possibilities for ailments of both. Contemplation of the bone as merely an unchanging support pillar is outdated and obsolete. Instead it is mandatory that this highly diverse network be incorporated in our understanding of the immune system and hematopoiesis.
Journal Article
The osteology of Triisodon crassicuspis
Following the end-Cretaceous mass extinction, mammals underwent an increase in body size, taxonomic diversity and ecological specialization throughout the Paleocene, exemplifying their adaptability. One especially enigmatic group is the \"Triisodontidae\", medium- to large-sized ungulate-like placentals from the Paleocene which are best known from their teeth that exhibit adaptations towards carnivory. The \"triisodontids\" were the first large carnivorous mammals and pre-date, and may have given rise to, Mesonychia, a group of more specialized placental carnivores. The \"triisodontids\" have been well-described from dental material, although very little is known about their postcrania. Here, we describe the postcrania of Triisodon crassicuspis-the most completely represented species of the genus to date-from a specimen (NMMNH P-72096) recovered from basal Torrejonian strata of the Nacimiento Formation in the San Juan Basin, New Mexico. Anatomical comparisons reveal that the forelimb long bones of Tri. crassicuspis are robust relative to its size, more so than other \"triisodontids\". Attachment sites on the ulna are evidence of well-developed muscles involved in powerful extension and flexion of the manus. In Tri. crassicuspis, the range of pronation-supination was limited as evident from the humeroradial morphology. Qualitative functional assessment of osteological features of the forelimb of Tri. crassicuspis is suggestive of terrestrial locomotion with at least moderate digging ability. Re-analyses of the dentition confirmed that Tri. crassicuspis had specializations for carnivory, and provide a body mass estimate of ca. 32-44 kg based on dental proxies. In summary, Tri. crassicuspis was a relatively large and powerful terrestrial animal, and one of the first known placentals to fill a largely carnivorous niche.
Journal Article
Osteology of an exceptionally well-preserved tapejarid skeleton from Brazil: Revealing the anatomy of a curious pterodactyloid clade
A remarkably well-preserved, almost complete and articulated new specimen (GP/2E 9266) of Tupandactylus navigans is here described for the Early Cretaceous Crato Formation of Brazil. The new specimen comprises an almost complete skeleton, preserving both the skull and post-cranium, associated with remarkable preservation of soft tissues, which makes it the most complete tapejarid known thus far. CT-Scanning was performed to allow the assessment of bones still covered by sediment. The specimen can be assigned to Tupa . navigans due to its vertical supra-premaxillary bony process and short and rounded parietal crest. It also bears the largest dentary crest among tapejarine pterosaurs and a notarium, which is absent in other representatives of the clade. The new specimen is here regarded as an adult individual. This is the first time that postcranial remains of Tupa . navigans are described, being also an unprecedented record of an articulated tapejarid skeleton from the Araripe Basin.
Journal Article
Elliptical Fourier analysis: fundamentals, applications, and value for forensic anthropology
The numerical description of skeletal morphology enables forensic anthropologists to conduct objective, reproducible, and structured tests, with the added capability of verifying morphoscopic-based analyses. One technique that permits comprehensive quantification of outline shape is elliptical Fourier analysis. This curve fitting technique allows a form’s outline to be approximated via the sum of multiple sine and cosine waves, permitting the profile perimeter of an object to be described in a dense (continuous) manner at a user-defined level of precision. A large amount of shape information (the entire perimeter) can thereby be collected in contrast to other methods relying on sparsely located landmarks where information falling in between the landmarks fails to be acquired. First published in 1982, elliptical Fourier analysis employment in forensic anthropology from 2000 onwards reflects a slow uptake despite large computing power that makes its calculations easy to conduct. Without hurdles arising from calculation speed or quantity, the slow uptake may partly reside with the underlying mathematics that on first glance is extensive and potentially intimidating. In this paper, we aim to bridge this gap by pictorially illustrating how elliptical Fourier harmonics work in a simple step-by-step visual fashion to facilitate universal understanding and as geared towards increased use in forensic anthropology. We additionally provide a short review of the method’s utility for osteology, a summary of past uses in forensic anthropology, and software options for calculations that largely save the user the trouble of coding customized routines.
Journal Article
Bone mineral density and geometric morphometrics: Indicators of growth in the immature pars basilaris
The pars basilaris forms a central component of the immature basicranium and owing to its resilience to post-mortem and taphonomic changes, holds significance across evolutionary, clinical, and forensic contexts. While size and shape parameters of the pars basilaris have been investigated, little is known about the influence of the underlying bone mineral density on the morphometry of this bone during growth. This study aimed to investigate the development and growth of the pars basilaris with specific reference to changes in bone density patterning and development of osteological features, during the prenatal and early postnatal periods of life. A total of 109 pars basilari were sourced from the Johannesburg Forensic Paediatric Collection, University of the Witwatersrand, South Africa. The study sample was subdivided into early prenatal (<30 gestational weeks), prenatal (30–40 gestational weeks) and postnatal (birth to 7.5 months) groups and micro-CT scanned to assess bone mineral density patterns across seven regions of interest. Size and shape changes were analysed using 11 digitized landmarks and geometric morphometrics. When comparing across age groups, the assessed dimensions increased with growth manifesting as a deepening at the anterior border of the foramen magnum, development of the lateral angles and widening of the bone at the lateral projections and spheno-occipital synchondrosis. However, no significant changes in the distribution of bone mineral density were observed. An appreciation of morphological changes and bone quality at specific growth sites in the pars basilaris is essential when analyzing remains of unknown provenance for the purposes of identification in disaster victim settings.
•Novel bone mineral density analysis of human pars basilari suggests uniform ossification during gestation and infancy.•Three-dimensional landmark data contributes to the understanding of global shape changes during gestation and infancy.•Statistically significant differences in the size of the pars basilaris supports previous findings from dry bone metrics.•Growth regions on the surface of the pars basilaris contributes to the forensic identification of unidentified individuals.
Journal Article