Effects of coronal substrates and water storage on the microhardness of a resin cement used for luting ceramic crowns

Composite resin and metallic posts are the materials most employed for reconstruction of teeth presenting partial or total destruction of crowns. Resin-based cements have been widely used for cementation of ceramic crowns. The success of cementation depends on the achievement of adequate cement curing. Objectives: To evaluate the microhardness of Variolink® II (Ivoclar Vivadent, Schaan, Liechtenstein), used for cementing ceramic crowns onto three different coronal substrate preparations (dentin, metal, and composite resin), after 7 days and 3 months of water storage. The evaluation was performed along the cement line in the cervical, medium and occlusal thirds on the buccal and lingual aspects, and on the occlusal surface. Material and Methods: Thirty molars were distributed in three groups (N=10) according to the type of coronal substrate: Group D- the prepared surfaces were kept in dentin; Groups M (metal) and R (resin)- the crowns were sectioned at the level of the cementoenamel junction and restored with metallic cast posts or resin build-up cores, respectively. The crowns were fabricated in ceramic IPS e.max® Press (Ivoclar Vivadent, Schaan, Liechtenstein) and luted with Variolink II. After 7 days of water storage, 5 specimens of each group were sectioned in buccolingual direction for microhardness measurements. The other specimens (N=5) were kept stored in deionized water at 37ºC for three months, followed by sectioning and microhardness measurements. Results: Data were first analyzed by three-way ANOVA that did not reveal significant differences between thirds and occlusal surface (p=0.231). Two-way ANOVA showed significant effect of substrates (

Biomass and Nutrient input by Allagoptera arenariain in Restinga da Marambaia, Rio de Janeiro, RJ

 O estudo avaliou a quantidade de matéria orgânica e nutrientes foliares aportados ao solo por Allagoptera arenaria em uma comunidade arbustiva de Palmae na restinga de Marambaia, Rio de Janeiro. As coletas foram realizadas em dez parcelas de 10 m x 10 m (100 m²), demarcadas aleatoriamente na formação arbustiva. Foram coletadas 3 (três) folhas de dez indivíduos adultos escolhidos aleatoriamente. Foi possível quantificar um incremento anual de massa seca de 8,2 Mg.ha-1 ano-1 para a área de estudo. Para o N, observou-se um teor de 12,3 g.kg-1, seguido de 5,7 g.kg-1 para o K, os quais representam, respectivamente, um aporte de 303 kg.N.ha-1.ano-1 e 140 kg.K.ha-1.ano-1. Para P, foi verificado teor no material foliar na ordem de 0,31 g.kg-1, com aporte de 7,4 kg.ha-1.ano-1.Palavra-chave: Ciclagem de nutrientes; ecossistemas costeiros; palmáceas; plantas focais. AbstractBiomass and Nutrient input by Allagoptera arenariain in Restinga da Marambaia, Rio de Janeiro, RJ. This research assessed the amount of organic matter and foliar nutrients in the soil from Allagoptera arenaria in a Palmae shrub community of Restinga da Marambaia, Rio de Janeiro. Samples were collected at ten randomly demarcated plots of 10 x 10m (100 m²) in the bush. We collected three (3) leaves of ten randomly chosen adults. It was possible to quantify an annual increase of dry mass of 8,2 Mg ha-1 yr-1 for the focused area. We observed for N an average grade of 12,3 g kg-1 followed by 5,7 g kg-1 for K, which respectively represent an investment of 303 kg N ha-1 year-1 and 140 kg K ha-1 year-1. We observed for P mean levels in leaf material in order of 0,31 g kg-1 with intake of 7,4kg ha-1 year-1.Keywords: Nutrient cycling; coastal ecosystems; palms; nurse plants.Biomass and Nutrient input by Allagoptera arenariain in Restinga da Marambaia, Rio de Janeiro, RJ. This research assessed the amount of organic matter and foliar nutrients in the soil from Allagoptera arenaria in a Palmae shrub community of Restinga da Marambaia, Rio de Janeiro. Samples were collected at ten randomly demarcated plots of 10 x 10m (100 m²) in the bush. We collected three (3) leaves of ten randomly chosen adults. It was possible to quantify an annual increase of dry mass of 8,2 Mg ha-1 yr-1 for the focused area. We observed for N an average grade of 12,3 g kg-1 followed by 5,7 g kg-1 for K, which respectively represent an investment of 303 kg N ha-1 year-1 and 140 kg K ha-1 year-1. We observed for P mean levels in leaf material in order of 0,31 g kg-1 with intake of 7,4kg ha-1 year-1.Keywords: Nutrient cycling; coastal ecosystems; palms; nurse plants

Theory of didactic situations and remote education in pandemic times: a proposal for teaching the concept of volume through the Google Meet platform and GeoGebra software

Em meio à pandemia do Coronavírus – COVID 19 e ao distanciamento social que causou o fechamento de todas as instituições de ensino de todo o mundo, professores foram obrigados, de forma emergencial, a reinventarem-se no processo de transmissão do ensino para os estudantes com o propósito de diminuir o impacto que tal situação provocou no procedimento estratégico do aprendizado. Diante disso, este artigo apresenta alguns resultados de uma investigação em andamento, que acontece no Instituto Federal de Educação, Ciência e Tecnologia do Ceará – IFCE, Brasil, cuja aplicação foi realiza por intermédio do Ensino Remoto. Esses resultados buscaram responder ao seguinte questionamento: É possível, por intermédio do Ensino Remoto, aplicar as dialéticas da Teoria das Situações Didáticas (ação, formulação, validação e institucionalização), de modo a promover o desenvolvimento lógico dedutivo para a resolução de problemas? Dessa forma, apresenta-se uma situação didática no viés do ENEM que foi estruturada nas quatro fases da TSD, com o amparo do software GeoGebra e alicerçada na EDF, em que a principal característica é a produção de recursos didáticos e a formação de professor. Utilizou-se o GeoGebra para modelar o problema, pois possibilita que o aprendiz movimente e visualize elementos e propriedades matemáticas essenciais para o desenvolvimento do raciocínio lógico-dedutivo necessários à resolução de problemas.In the midst of the Coronavirus pandemic - COVID 19 and the social detachment that caused the closure of all educational institutions around the world, teachers were forced, in an emergency way, to reinvent themselves in the process of transmitting education to students with the purpose of reducing the impact that this situation had on the strategic learning procedure. In light of this, this article presents some results of an ongoing investigation, which takes place at the Federal Institute of Education, Science and Technology of Ceará - IFCE, Brazil, whose application was carried out through Remote Education. These results sought to answer the following question: Is it possible, through Remote Teaching, to apply the dialectic of Theory of Didactic Situations (action, formulation, validation and institutionalization), in order to promote the deductive logical development for solving problems? In this way, a didactic situation is presented from the perspective of ENEM that was structured in the four phases of TSD, with the support of the GeoGebra software and based on EDF, in which the main characteristic is the production of didactic resources and teacher training. GeoGebra was used to model the problem, as it allows the learner to move and visualize elements and mathematical properties essential for the development of logical-deductive reasoning necessary to solve problems.Facultad de Informátic

Psychological Factors Related to Fibromyalgia Syndrome Phenomenon

Fibromyalgia is a chronic rheumatic syndrome characterized mainly by diffuse musculoskeletal pain. Its diagnosis is clinical and the presence of 15 to 18 tender specific painful body sites (tender points), with no specific laboratory alterations. It is often associated with other symptoms such as constant fatigue, swelling, morning stiffness, difficulty in memorizing and concentrating, mood swings, anxiety, and depression, among others. This condition mainly affects women, bringing a considerable negative impact on carriers. Pain perception is the result of multiple factors: biological, social, and psychological. This study sought through qualitative research to recognize the psychosocial factors related to fibromyalgia, as well as identify the possible meanings to suffering, seeking to contribute to elucidate the psychogenic phenomena related to the pain of Fibromyalgia Syndrome. Finally, to analyze if patients who are undergoing psychotherapy follow-up benefit from the symptoms caused by chronic pain of fibromyalgia. The result is divided into three categories: Implications of the diagnosis in social relations, repercussions of the diagnosis on the interviewees\u27 quality of life, and psycho-affective symptoms experienced by the interviewed fibromyalgia patients. According to the research, it was observed physical limitation, adding severe pain, memory impairment, concentration, excessive fatigue, resulting in psychic suffering characterized as guilt, frustration, depression, anxiety, and self-image affected. In this study, ten female patients with a mean age of 40.2 years were interviewed, of which 30% are undergoing psychological follow-up, which resulted in greater acceptance of their comorbidity and coping with it

Manual digital odontológico acessível em Língua Brasileira de Sinais para pacientes surdos em casos de dor

Introduction: Painful symptomatology is a pathognomonic sign of dental diseases such as caries and periodontal disease and it is important for dental professionals to maintain a comprehensible communication with the patient in order to solve the patient's case of pain, however in the case of hearing impaired patients this understanding is compromised due to the lack of knowledge of the dental class about the use of the Brazilian Sign Language (LIBRAS), which is a way of guaranteeing communication with people from the deaf community. Objective: To create an Interactive Digital Manual accessible in LIBRAS (Brazilian Sign Language) to assist in the communication process during dental care for deaf patients with painful symptoms. Material and Methods: Google Scholar, SciELO and VHL databases were consulted, in Portuguese and English. The videos were recorded by a professional sign language interpreter, through a Samsung Galaxy A11 smartphone, using ringlight, Chroma Key technique and edited in the LightWorks program. The handbook was created using the Canva and Keynote apps. Results: The manual has 11 videos and are available on the website www.odontologiaelibras.com. Conclusion: the use of a digital manual in Libras with an interactive anamnesis is a proven effective tool in the patient-professional relationship, especially regarding the patient's right to good communication on the part of the professional and the health team.Introducción: La sintomatología dolorosa es un signo patognomónico de enfermedades dentales como la caries y la enfermedad periodontal y es importante que los profesionales de la odontología mantengan una comunicación comprensible con el paciente para poder solucionar su caso de dolor, sin embargo en el caso de pacientes con deficiencia auditiva esa comprensión se ve comprometida por el desconocimiento de la clase de odontología sobre el uso de la Lengua Brasileña de Signos (LIBRAS), que es una forma de garantizar la comunicación con las personas de la comunidad sorda. Objetivo: Crear un Manual Digital Interactivo accesible en LIBRAS (Lengua de Señas Brasileña) para ayudar en el proceso de comunicación durante la atención odontológica a pacientes sordos con síntomas dolorosos. Material y Métodos: Se consultaron las bases de datos Google Scholar, SciELO y BVS, en portugués e inglés. Los videos fueron grabados por un intérprete profesional de lengua de señas, a través de un teléfono inteligente Samsung Galaxy A11, utilizando la técnica Ringlight, Chroma Key y editados en el programa LightWorks. El manual se creó con las aplicaciones Canva y Keynote. Resultados: El manual consta de 11 videos y están disponibles en la página web www.odontologiaelibras.com. Conclusión: el uso de un manual digital en Libras con anamnesis interactiva es una herramienta comprobadamente eficaz en la relación paciente-profesional, especialmente en lo que se refiere al derecho del paciente a una buena comunicación por parte del profesional y del equipo de salud.Introdução: A sintomatologia dolorosa é um sinal patognomônico de enfermidades odontológicas como cárie e doença periodontal e é importante para os profissionais da odontologia manter uma comunicação compreensível com o paciente a fim de solucionar o caso de dor dos pacientes, contudo no caso de pacientes deficientes auditivos esse entendimento é comprometido devido ao desconhecimento da classe odontológica sobre a utilização da Língua Brasileira de Sinais (LIBRAS) que é uma forma de garantir a comunicação com pessoas da comunidade surda. Objetivo:Confeccionar um Manual Digital Interativo acessível em LIBRAS (Língua Brasileira de Sinais) para auxiliar no processo de comunicação, durante o atendimento odontológico de pacientes surdos com sintomatologia dolorosa. Material e Métodos:Foram consultadas as bases de dadosGoogle Acadêmico, SciELO e BVS, em português e inglês. Os vídeos foram gravados por uma profissional intérprete de libras, através de smartphoneSamsung Galaxy A11, uso deringlight, técnica Chroma Key e editados no programa LightWorks. O manual foi criado com o uso dos aplicativos Canvae Keynote. Resultados: O manual possui 11 vídeos e estão disponibilizados no site www.odontologiaelibras.com. Conclusão: a utilização de um manual digital em Libras com uma anamnese interativa é um instrumento comprovadamente eficaz na relação paciente-profissional, principalmente no que tange o direito do paciente à boa comunicação por parte do profissional e a equipe de saúde

Desafios para o diagnóstico e tratamento da endometriose e consequências do diagnóstico tardio: Challenges for the diagnosis and treatment of endometriosis and consequences of late diagnosis

Este artigo teve como objetivo uma análise da literatura por revisão das publicações atuais acerca do tema endometriose, com enfoque nas consequências do diagnóstico e tratamento tardios. A endometriose é uma doença ginecológica, de caráter inflamatório e crônico, que se caracteriza pela presença de tecido endometrial fora da cavidade uterina. É uma patologia que impacta de forma significativa a qualidade de vida de mulheres em idade reprodutiva, com repercussões físicas, emocionais, ocupacionais e socioeconômicas. Diante disso, descreve-se os critérios de diagnóstico e terapêutica, os impactos do diagnóstico tardio e propõe-se novos estudos que possibilitem a atualização no perfil epidemiológico e na relação de sinais, sintomas e histórico da paciente de forma geral, a fim de otimizar o manejo da endometriose nos dias de hoje

Impactos da síndrome de Burnout na qualidade de vida dos profissionais de enfermagem no ambiente hospitalar: revisão da literatura / Impacts of Burnout syndrome on the quality of life of nursing professionals in the hospital environment: literature review

Objetiva-se identificar na literatura os fatores, representações e efeitos da Síndrome de Burnout em profissionais de enfermagem hospitalar. Trata-se de uma revisão de literatura. Foram incluídos artigos em português relacionados à temática, publicados no período de 2010 a 2020, encontrados nas bases Scientific Electronic Library Online (SCIELO), Biblioteca Virtual em Saúde (BVS) e Portal de Busca Integrada/USP (PBI), utilizando como descritores: Burnout, Enfermagem e Psicologia. Verificou-se como principais potencializadores da SB em profissionais de enfermagem a sobrecarga de trabalho, situações críticas de assistência ao paciente, falta de estrutura hospitalar, cobrança de grupo e pessoal, falta de material, relacionamento crítico entre colegas de trabalho e falta de reconhecimento. Quanto às implicações do Burnout na qualidade de vida desses profissionais, constatou-se impactos físicos como apneia do sono, distúrbios no sistema nervoso, dores no corpo, crises de enxaqueca, náuseas, taquicardia e cefaleia. Sensação de cansaço extremo, angústia, estresse, distanciamento das pessoas, frustação, autocobrança, tensão, sentimentos depreciativos e despersonalização. As sugestões de intervenções e prevenção a SB, estão associadas a um acompanhamento psicoterapêutico, ginastica laboral, cartilha conscientizando sobre o estresse, realização de atividades físicas e de hábitos simples como: pensamentos mais positivos, horas de lazer e leitura. Em suma, os fatores potencializadores e as implicações da SB, podem impactar na realização dos cuidados aos pacientes. Para os profissionais, as consequências psicossociais tornam a SB uma síndrome psicológica que traz consigo problemas físicos que interferem na qualidade de vida dos profissionais da enfermagem, tornando-se necessário a realização de estratégias de enfrentamento

Brief Research Report: Expression of PD-1 and CTLA-4 in T Lymphocytes and Their Relationship With the Periparturient Period and the Endometrial Cytology of Dairy Cows During the Postpartum Period

The present study sought to evaluate the expression of PD-1 and CTLA-4 in blood T lymphocytes during the periparturient period and their relationship with uterine health in dairy cows, as determined by endometrial cytology and serum concentrations of β-hydroxybutyrate (BHB) and non-esterified fatty acids (NEFAs), which are indicators of a negative energy balance. The second objective of this study was to investigate whether the expression of PD-1 and CTLA-4 in T lymphocytes is associated with the serum acute phase-protein haptoglobin concentration during the periparturient period. To address these objectives, 26 clinically healthy dairy cows were used. Peripheral blood was collected 14 days prepartum (T-14), at calving (T0), and 30 days postpartum (T30) to measure the expression of PD-1 and CTLA-4 in blood T lymphocytes by flow cytometry. In addition, we collected blood at T0, 10 days after parturition (T10), and T30 to obtain serum and determine the serum concentrations of NEFA, BHB, and Hp. Endometrial cytology was performed at T10, 20 days after parturition (T20), and T30. In the present study, we observed higher expression of CTLA-4 and PD-1 in T lymphocytes at parturition and in the prepartum period, which could indicate a relationship between these immune checkpoints and immunological tolerance during gestation in dairy cattle. In addition, a negative association between the expression of these immune checkpoints prepartum or at parturition and endometrial cytology at T20 and T30 was observed, indicating the negative implications of these immune response regulators in susceptibility to infections. This finding was further corroborated by the relationship between the serum concentration of haptoglobin and the expression of CTLA-4 and PD-1 by T lymphocytes. However, we did not observe a relationship between the indicators of negative energy balance, evaluated by the serum concentrations of BHB and NEFA, and the expression of the immune checkpoint markers studied. Thus, our findings represent an initial step that paves the way for the development of new therapeutic alternatives directed by the host with the objective of increasing the resistance of dairy cattle to infections in this critical period of life