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This study assessed canal preparation effects on disinfection and dentin preservation. Thirty mandibular incisors were paired into two experimental groups (n = 10). Following contamination, the initial microbial sample was collected. Instruments 30/0.03 (Group 1) and 30/0.05 (Group 2) were employed and a second sample was obtained. Canals were enlarged using instruments 40/0.03 and 40/0.05, respectively, and a third sample was collected. Final irrigation was performed, and sample S4 obtained. A final scan evaluated volume, surface area, unprepared areas, removed dentin and dentin thickness. Data were analysed using Student t-test, Mann-Whitney, Kruskal-Wallis and Dunn tests. A significant difference was observed between S1 and other time points (p < 0.05). Comparison between groups showed no differences in bacterial loads and in the percentage of microbial reduction (p > 0.05). Group 2 exhibited greater reduction in dentin thickness than group 1 in the mesial aspect of the root (p < 0.05). Instrument 30/0.03 might provide effective disinfection and safety during mandibular incisors canal preparation.
Assuntos
Desinfecção , Incisivo , Mandíbula , Preparo de Canal Radicular , Humanos , Preparo de Canal Radicular/instrumentação , Preparo de Canal Radicular/métodos , Desinfecção/métodos , Cavidade Pulpar/microbiologia , Desenho de Equipamento , Dentina/microbiologia , Carga BacterianaRESUMO
Introdução: a dinâmica laboral, os fatores ambientais e a individualidade de enfrentamento nos postos de trabalho podem influenciar o surgimento de alterações físicas e psicológicas nos indivíduos. Objetivo: identificar os riscos ergonômicos de policiais de uma Unidade Especializada da Polícia Civil do Estado do Ceará. Métodos: trata de um estudo de caso no qual foi realizada uma Análise Ergonômica do Trabalho, de forma qualitativa e multidisciplinar, de três policiais civis, considerando quatro posições diferentes: posição ortostática com seu equipamento de proteção individual e de exercício laboral; posição de prontidão de tiro; posição de descanso, alerta em operação e fora da operação; e posição ortostática em operação. A análise foi realizada por meio de cinco etapas: análise da demanda; análise da tarefa; análise da atividade; diagnóstico; e recomendações, sendo avaliados o peso dos equipamentos, sobrecargas musculares e articulares e compensações posturais oriundas do exercício das atividades laborais. Resultados: foi detectada elevada carga de peso dos equipamentos, levando a desvios posturais. Os policiais também apresentaram condutas posturais viciosas na execução das atividades. Conclusão: alterações e vícios posturais precisam ser solucionadas visando o cuidado com a saúde dos policiais, de modo a evitar afastamentos para tratamento de saúde. Recomendações foram propostas.
Introduction: the labor dynamics, the environmental factors and the individuality of confrontation at workstations may influence the emergence of physical and psychological alterations in individuals. Objective: to identify the ergonomic risks of policemen of a Specialized Unit of the Civil Police of the State of Ceará. Methods: this is a case study in which a qualitative and multidisciplinary Ergonomic Analysis of Work was carried out on three civilian policemen, considering four different positions: orthostatic position with their individual protection equipment and work exercise; shooting readiness position; resting position, alert in operation and out of operation; and orthostatic position in operation. The analysis was conducted through five stages: demand analysis; task analysis; activity analysis; diagnosis; and recommendations, evaluating the weight of the equipment, muscle and joint overloads and postural compensations arising from the exercise of labor activities. Results: a high weight load of the equipment was detected, leading to postural deviations. The policemen also presented vicious postural behaviors in the execution of their activities. Conclusion: postural alterations and addictions need to be solved in order to take care of the policemen's health, so as to avoid absence for health treatment. Recommendations were proposed.
Introducción: la dinámica laboral, los factores ambientales y la individualidad del enfrentamiento en los puestos de trabajo pueden influir en la aparición de alteraciones físicas y psicológicas en los individuos. Objetivo: identificar los riesgos ergonómicos de los policías de una Unidad Especializada de la Policía Civil del Estado de Ceará. Método: se trata de un estudio de caso en el que se realizó un Análisis Ergonómico del Trabajo cualitativo y multidisciplinar a tres policías civiles, considerando cuatro posiciones diferentes: posición ortostática con su equipo de protección individual y ejercicio de trabajo; posición de preparación para el tiro; posición de descanso, alerta en operación y fuera de operación; y posición ortostática en operación. El análisis se realizó a través de cinco etapas: análisis de la demanda; análisis de la tarea; análisis de la actividad; diagnóstico; y recomendaciones, evaluando el peso del equipo, las sobrecargas musculares y articulares y las compensaciones posturales derivadas del ejercicio de las actividades laborales. Resultados: se detectó una elevada carga de peso del equipo, lo que provocó desviaciones posturales. Los policías también presentaron comportamientos posturales viciosos en la ejecución de sus actividades. Conclusión: las alteraciones posturales y las adicciones necesitan ser solucionadas para cuidar de la salud de los policías, de forma a evitar ausencias para tratamiento sanitario. Se propusieron recomendaciones.
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ABSTRACT The COVID-19 pandemic has imposed a health crisis around the world. Health professionals are frequently exposed to stressors that put them at high risk for the development or progression of disabling mental disorders, including posttraumatic stress disorder (PTSD). To understand how pandemic stressors have affected the mental health of healthcare workers, our group conducted a longitudinal and nationwide survey. We investigated the occurrence of traumatic events related to the COVID-19 pandemic and the association between exposure to these events and PTSD symptomatology. Importantly, we also investigated factors that might increase or decrease the risk for PTSD. Depression symptoms were also investigated. The results of the first wave of the project were published in a series of three articles, each focused on different risk or protective factors. The results showed that female sex, young age, a lack of adequate personal protective equipment, social isolation and a previous history of mental illness were consistent predictors of PTSD symptoms. Healthcare workers who reported high levels of peritraumatic tonic immobility, a defensive response that is involuntary, reflexive, and evoked by an intense and inescapable threat, also exhibited an increase in the probability of being diagnosed with PTSD. On the other hand, professional recognition had a negative relationship with PTSD and depression symptoms, emerging as a significant protective factor for psychological health. The identification of protective and risk factors in these situations is crucial to guide the adoption of long-term measures in work environments that will enhance the psychological health of these professionals.
RESUMO A pandemia de COVID-19 impôs uma crise de saúde no mundo. Profissionais de saúde foram frequentemente expostos a estressores que os colocam em alto risco para o desenvolvimento ou progressão de transtornos mentais incapacitantes, incluindo o transtorno de estresse pós-traumático (TEPT). Para entender como esses estressores afetaram a saúde mental desses profissionais, nosso grupo realizou um estudo longitudinal nacional. Investigamos a ocorrência de eventos traumáticos especificamente relacionados à pandemia e a associação entre a exposição a esses eventos traumáticos e a sintomatologia do TEPT. É importante ressaltar que também investigamos fatores que podem aumentar ou diminuir o risco de TEPT. Sintomas de depressão também foram investigados. Os resultados da primeira onda do projeto foram publicados em uma série de três artigos, cada um focado em diferentes fatores de risco ou proteção. Os resultados mostraram que sexo feminino, idade jovem, falta de equipamento de proteção individual adequado, isolamento social e história prévia de doença mental foram preditores consistentes de sintomas de TEPT. Os profissionais de saúde que relataram altos níveis de imobilidade tônica, uma resposta peritraumática involuntária e reflexa evocada em situações de ameaça intensa e inescapável, exibiram aumento na probabilidade de um provável diagnóstico de TEPT. Por outro lado, reconhecimento profissional teve relação negativa com sintomas de TEPT e depressão, emergindo como importante fator de proteção para a saúde mental. Identificar fatores protetores ou de risco nessas situações é fundamental para orientar a adoção de medidas de longo prazo nos ambientes de trabalho que melhorem a saúde mental desses profissionais.
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Despite the progress observed in recent years, women are still underrepresented in science worldwide, especially at top positions. Many factors contribute to women progressively leaving academia at different stages of their career, including motherhood, harassment and conscious and unconscious discrimination. Implicit bias plays a major negative role in recognition, promotions and career advancement of female scientists. Recently, a rank of the most influential scientists in the world was created based on several metrics, including the number of published papers and citations. Here, we analyzed the representation of Brazilian scientists in this rank, focusing on gender. Female Brazilian scientists are greatly underrepresented in the rank (11% in the Top 100,000; 18% in the Top 2%). Possible reasons for this observed scenario are related to the metrics used to rank scientists, which reproduce and amplify the well-known implicit bias in peer-review and citations. Male scientists have more self-citation than female scientists and positions in the rank varied when self-citations were included, suggesting that self-citation by male scientists increases their visibility. Discussions on the repercussions of such ranks are pivotal to avoid deepening the gender gap in science.
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Publicações , Brasil , Feminino , Humanos , MasculinoRESUMO
BACKGROUND: Mycobacterium leprae and Mycobacterium lepromatosis are gram-positive bacterial pathogens and the causative agents of leprosy in humans across the world. The elimination of leprosy cannot be achieved by multidrug therapy alone, and highlights the need for new tools and drugs to prevent the emergence of new resistant strains. METHODS: In this study, our contribution includes the prediction of vaccine targets and new putative drugs against leprosy, using reverse vaccinology and subtractive genomics. Six strains of Mycobacterium leprae and Mycobacterium lepromatosis (4 and 2 strains, respectively) were used for comparison taking Mycobacterium leprae strain TN as the reference genome. Briefly, we used a combined reverse vaccinology and subtractive genomics approach. RESULTS: As a result, we identified 12 common putative antigenic proteins as vaccine targets and three common drug targets against Mycobacterium leprae and Mycobacterium lepromatosis. Furthermore, the docking analysis using 28 natural compounds with three drug targets was done. CONCLUSIONS: The bis-naphthoquinone compound Diospyrin (CID 308140) obtained from indigenous plant Diospyros spp. showed the most favored binding affinity against predicted drug targets, which can be a candidate therapeutic target in the future against leprosy.
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Mycobacterium leprae and Mycobacterium lepromatosis are gram-positive bacterial pathogens and the causative agents of leprosy in humans across the world. The elimination of leprosy cannot be achieved by multidrug therapy alone, and highlights the need for new tools and drugs to prevent the emergence of new resistant strains. Methods In this study, our contribution includes the prediction of vaccine targets and new putative drugs against leprosy, using reverse vaccinology and subtractive genomics. Six strains of Mycobacterium leprae and Mycobacterium lepromatosis (4 and 2 strains, respectively) were used for comparison taking Mycobacterium leprae strain TN as the reference genome. Briefly, we used a combined reverse vaccinology and subtractive genomics approach. Results As a result, we identified 12 common putative antigenic proteins as vaccine targets and three common drug targets against Mycobacterium leprae and Mycobacterium lepromatosis. Furthermore, the docking analysis using 28 natural compounds with three drug targets was done. Conclusions The bis-naphthoquinone compound Diospyrin (CID 308140) obtained from indigenous plant Diospyros spp. showed the most favored binding affinity against predicted drug targets, which can be a candidate therapeutic target in the future against leprosy.(AU)