SUMMARY: The COVID-19 pandemic caused several changes in the teaching of human anatomy, among them the use of different teaching methodologies based on E-learning. However, studies evaluating electronic tools have not provided clear evidence of effective student learning. Thus, this was the first study to evaluate medical students after completing human anatomy courses in the E- learning modality. We recruited first term (Group A, n=25) and second term (Group B, n=13) medical students. We applied a practical assessment based on 50 human anatomy markingson real anatomical specimens and cadavers, to be completed in Questionnaire 01 (Phase I). After detecting low scores on Questionnaire 01 by both groups, we applied a practical and face-to-face tutoring system for 14 days (Phase II). Afterwards, we re-evaluated both groups by repeating the same scores (Questionnaire 02, Phase III). According to the paired analysis of questionnaires 01 and 02 by Student's T-test, both groups showed significant increase in the final scores obtained in questionnaire 02 (Phase III). The evidence showed that the remote format lecture system weakened the learning and retention process of basic anatomical knowledge by medical students. On the other hand, in-person practical teaching proved to be efficient in the formative process of the students, a fact proven by the significant increase in the scores of the students in the 02 questionnaire, for both groups.

RESUMEN: La pandemia por COVID-19 provocó varios cambios en la enseñanza de la anatomía humana, entre ellos el uso de diferentes metodologías de enseñanza basadas en E-learning. Sin embargo, los estudios que evalúan las herramientas electrónicas no han proporcionado evidencia clara de un aprendizaje efectivo de los estudiantes. Este fue el primer estudio que evaluó a estudiantes de medicina luego de cursar cursos de anatomía humana en la modalidad E-learning. Reclutamos estudiantes de medicina de primer término (Grupo A, n=25) y segundo término (Grupo B, n=13). Se aplicó una evaluación práctica basada en 50 marcas de anatomía humana sobre especímenes anatómicos reales y cadáveres, para ser completado en el Cuestionario 01 (Fase I). Tras detectar puntuaciones bajas en el Cuestionario 01 por parte de ambos grupos, se aplicó un sistema de tutorías prácticas y presenciales durante 14 días (Fase II). Posteriormente, reevaluamos ambos grupos repitiendo las mismas puntuaciones (Cuestionario 02, Fase III). Según el análisis apareado de los cuestionarios 01 y 02 por la prueba T de Student, ambos grupos mostraron aumento significativo en los puntajes finales obtenidos en el cuestionario 02 (Fase III). La evidencia mostró que el sistema de conferencias en formato remoto debilitó el proceso de aprendizaje y retención de conocimientos anatómicos básicos por parte de los estudiantes de medicina. Por otro lado, la docencia práctica presencial demostró ser eficiente en el proceso formativo de los alumnos, hecho que demuestra el aumento significativo de las puntuaciones de los alumnos en el cuestionario 02, para ambos grupos.

RESUMEN: Las proteínas S100 pertenecen al grupo de proteínas fijadoras de calcio y están presentes en actividades reguladoras fisiológicas intracelulares y extracelulares, como la diferenciación celular, y actúan en procesos patológicos inflamatorios y neoplásicos. Recientemente, sus expresiones en el sistema nervioso han sido ampliamente estudiadas, buscando dilucidar su acción a nivel del tálamo: una estructura del sistema nervioso central que forma parte de importantes circuitos, como el somatosensorial, conductual, de memoria y cognitivo, así como además de ser responsable de la transmisión y regulación de la información a la corteza cerebral. Este artículo es una revisión integradora de la literatura científica, que analizó 12 estudios presentes en Pubmed. El análisis mostró que la relación de las proteínas S100 y el tálamo ha sido descrita en procesos neoplásicos, trastornos mentales, hipoxia, trauma, estrés, infección, enfermedad de Parkinson y epilepsia. En resumen, es posible concluir que esta familia de proteínas es relevante como marcador en procesos de lesión talámica, requiriendo más estudios para comprender mejor su significado clínico, preclínico y su valor pronóstico.

SUMMARY: S100 proteins belong group of calcium-binding proteins and are present in physiological intracellular and extracellular regulatory activities, such as cell differentiation, and act in inflammatory and neoplastic pathological processes. Recently, its expressions in the nervous system have been extensively studied, seeking to elucidate its action at the level of the thalamus: A structure of the central nervous system that is part of important circuits, such as somatosensory, behavioral, memory and cognitive, as well as being responsible for the transmission and regulation of information to the cerebral cortex. This article is an integrative review of scientific literature, which analyzed 12 studies present in Pubmed. The analysis showed that the relationship of S100 proteins and the thalamus has been described in neoplastic processes, mental disorders, hypoxia, trauma, stress, infection, Parkinson's disease and epilepsy. In summary, it is possible to conclude that this protein family is relevant as a marker in processes of thalamic injury, requiring further studies to better understand its clinical, preclinical meanings and its prognostic value.

Resumo O diagnóstico da síndrome compartimental em regiões que não são frequentemente afetadas, por possuírem uma boa relação continente-conteúdo, pode se tornar difícil, uma vez que o cirurgião terá dificuldades em alcançar um diagnóstico apenas por um sinal ou sintoma isolado. Assim, muitas vezes, pode-se protelar a conduta adequada, desencadeando danos ao paciente. A paciente era uma mulher, de 29 anos, que foi atendida com dor em mão esquerda por queimadura, com lesão em região anterior à tabaqueira anatômica de tamanho significativo. A paciente já havia sido submetida a cirurgia na sua cidade de origem com desbridamento de pele e tecido subcutâneo há 30 dias, com evolução sem melhora do quadro doloroso. Estava em uso de antibioticoterapia (ceftriaxona 1 g de 12 em 12 horas) e analgesia com dose terapêutica de morfina de 8 em 8 horas.

Abstract In areas that are not commonly affected by compartment syndrome because they have a good content/container ratio, diagnosis of the condition can be a challenge, since surgeons will find it difficult to make a diagnosis on the basis of an isolated sign or symptom. As a result, the correct treatment can very often be delayed, causing harm to the patient. In this case, the patient was a 29-year-old woman who was seen for a painful left hand secondary to a large burn injury to the area anterior of the anatomical snuffbox. She had already undergone surgery in her home town 30 days previously, with debridement of skin and subcutaneous tissue, but the pain had not improved. She was on antibiotic therapy (ceftriaxone, 1g every 12 hours) and analgesia, with therapeutic morphine doses every 8 hours.

SUMMARY: Mesenchymal cells (MCs) exhibit great regenerative potential due to their intrinsic properties and ability to restore tissue function, either directly through transdifferentiation or indirectly through paracrine effects. This study aimed to evaluate morphometric and phenotypic changes in MCs grown with facial nerve-conditioned medium in the presence or absence of fibroblast growth factor 2 (FGF-2). For quantitative phenotypic analysis, the expression of GFAP, OX-42, MAP-2, β-tubulin III, NeuN, and NF-200 was analyzed by immunocytochemistry. Cells cultured with facial nerve-conditioned medium in the presence of FGF-2 expressed GFAP, OX-42, MAP-2, β-tubulin III, NeuN, and NF-200. On average, the area and perimeter of GFAP-positive cells were higher in the group cultured with facial nerve-conditioned medium compared to the group cultured with conditioned medium and FGF-2 (p=0.0001). This study demonstrated the plasticity of MCs for neuronal and glial lineages and opens up new research perspectives in cell therapy and trans.differentiation.

RESUMEN: Las células mesenquimales (CM) exhiben un gran potencial regenerativo debido a sus propiedades intrínsecas y la capacidad de restaurar la función del tejido, ya sea directamente, a través de la transdiferenciación, o indirectamente, a través de efectos parácrinos. Este estudio tuvo como objetivo evaluar los cambios morfométricos y fenotípicos en CM cultivadas con medio condicionado por nervio facial en presencia o ausencia de factor de crecimiento de fibroblastos 2 (FGF-2). Para el análisis fenotípico cuantitativo, se analizó la expresión de GFAP, OX-42, MAP-2, β-tubulina III, NeuN y NF-200 mediante inmunocitoquímica. Las células cultivadas con medio condicionado por el nervio facial en presencia de FGF-2 expresaban GFAP, OX-42, MAP-2, β-tubulina III, NeuN y NF-200. En promedio, el área y el perímetro de las células positivas para GFAP fueron mayores en el grupo cultivado con medio condicionado por el nervio facial en comparación con el grupo cultivado con medio acondicionado y FGF-2 (p = 0,0001). Este estudio demostró la plasticidad de CM para linajes neuronales y gliales y abre nuevas perspectivas de investigación en terapia celular y transdiferenciación.

RESUMO As lesões em face representam um grande agravo à saúde do indivíduo, principalmente pela sua significância, tanto funcional, por abrigar órgãos sensitivos e parte dos sistemas respiratório e digestório, quanto estético. Neste cenário, ferimentos por arma de fogo neste local, geram grande preocupação pela magnitude de seus danos, devendo a equipe de Cirurgia e Traumatologia Bucomaxilofacial agir para que o tratamento possibilite a reabilitação do paciente no menor tempo possível, com o mínimo de complicações e sequelas. O objetivo desse trabalho é relatar um caso clínico de uma paciente de 19 anos de idade, apresentando uma fratura cominutiva, com perda de substância, em corpo de mandíbula por projétil de arma de fogo, tratada de forma imediata, com fixação interna estável, utilizando o sistema placa-parafuso 2,0 mm para a simplificação da fratura e placa de reconstrução 2,4 mm locking sobre a lacuna óssea. Aspectos relevantes da técnica e tática cirúrgica são revistos e o acompanhamento da paciente em longo prazo é apresentado.

ABSTRACT Injuries to the face represent a significant risk to the health of the individual, mainly because of its significance, both functional, because it houses sensory organs and part of the respiratory and digestive systems, as well as esthetic. In this scenario, gunshot wounds in this location cause great concern on account of the magnitude of the damage, and the Oral and Maxillofacial Surgery and Traumatology team must act so that the treatment enables the rehabilitation of the patient in the shortest possible time, with a minimum of complications and sequelae. The objective of this study is to report a clinical case of a 19-year-old female patient with a comminuted fracture of the mandible body caused by a firearm projectile, treated immediately with stable internal fixation using the 2.00 mm plate-screw system for simplification of the fracture and a 2.4 mm reconstruction locking-plate on the bone gap. Relevant aspects of the surgical technique and tactics are reviewed and long-term follow-up of the patient is presented.