8 research outputs found
Influência do tipo de luz polimerizadora e nível de término cervical do preparo cavitário no comportamento da cimentação adesiva
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências da Saúde. Programa de Pós-Graduação em OdontologiaO objetivo da pesquisa, in vitro, foi comparar uma unidade de fotoativação à base de LEDs, com uma unidade convencional halógena no selamento marginal em restaurações indiretas de compósitos. Na face mesial, o término ficou em nível da junção amelo-cementária, enquanto que na face distal ficou 2mm acima. OS resultados mostraram que para o fator margem houve diferença estatística, ocorrendo maior microinfiltração em dentina. Concluiu-se que o selamento marginal em restaurações indiretas de compósitos não foi influenciado pelas unidades fotopolimerizadoras e que as margens localizadas em dentina tiveram uma maior microinfiltração
Facetas em porcelana
No full textMonografia de Especialização - Universidade Federal de Santa Catarina. Centro de Ciências da Saúde. Curso de Especialização em Dentística RestauradoraO objetivo desta monografia é apresentar uma revisão de literatura e caso clínico relacionados às
facetas de porcelanas, que demonstram a obtenção de um ótimo resultado estético, através de um
protocolo clínico e laboratorial que deve ser cuidadosamente observado.
No presente trabalho, conceituamos indicações e contra — indicações, vantagens e desvantagens,
classificação das porcelanas, plano de tratamento, preparo, moldagem, provisórias, procedimento
laboratorial, seleção da cor e comunicação laboratorial, ajuste das facetas, reparo das facetas em
cerâmica, cimentação e acabamento são conceituados de forma sucinta e esclarecedora.The objective of this monograph is to present a literature review and case report related to the
porcelain veneers, that describe the obtain a more esthetic result, through a clinical protocol and
laboratorial that it should be observed carefully.
In the present work, we considered indications and limitations, advantages and disadvantages.
classification of the porcelains, treatment planning, tooth preparation, impression, temporization,
procedure laboratory, selection of the color and laboratory communication, adjustment of the
veneers, repair of the veneers in ceramic, placement and finishing is considered in a brief and
explanatory way
Ricordi di un traduttore da Catullo: problemi metrici, lessicali, di tono
No full textA
lessandro Fo, Memories from Translating Catullus: Questions of Meter, Lexicon and Tone
This paper summarizes some of the theoretical and practical problems encountered while recently translating Catullus into Italian-“barbarian” meters. The author explains his choice of a metrical version and describes the metrical structure it entailed. He reflects in particular on some problems of fidelity and especially on the necessity of recreating – in the translated text – the same figures of speech used in the original text, such as recurring words, close lexical repetitions, alliterations and sound patterns. Of particular interest here are translation problems relative to Lesbia’s arrival at Allius’ house in c. 68b
Influência do preenchimento da câmara pulpar com resina composta na resistência ao deslocamento de endocrowns
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências da Saúde. Programa de Pós-Graduação em OdontologiaO objetivo deste estudo foi verificar a influência do preenchimento da câmara pulpar com resina composta na resistência ao deslocamento de endocrowns. Para isso, foram utilizados 20 terceiros molares humanos, sendo eles divididos em dois grupos (n=10). No grupo 1, os dentes foram incluídos e preparados com o desgaste das retenções da câmara pulpar. No grupo 2, os dentes tiveram a câmara pulpar completamente preenchida por resina composta e depois tiveram os preparos confeccionados. As áreas das interfaces aderidas foram medidas com uma fina folha de papel alumínio. Os dentes foram moldados e Endocrowns cerâmicas foram confeccionadas e cimentadas adesivamente. As endocrowns foram submetidas ao teste de tração de coroas 24 horas após a cimentação e os valores transformados em N/cm² submetidos ao teste t de Student. Os resultados mostraram que houve diferenças entre os grupos, sendo que o grupo 2 (2030,95 +-223,24) N/cm² apresentou maior resistência ao deslocamento do que o grupo 1 (1285,2 +- 313,21) N/cm². O preenchimento da câmara pulpar aumentou a resistência ao deslocamento de Endocrowns sob o teste de tração de coroas.The objective of this study was to determinate the difference of retention of Endocrowns in teeth prepared with and without filling the pulp chamber retentions with composite. 20 human sound molars were divided in two experimental groups (n=10). In group 1, the teeth were prepared for Endocrowns and the retention were removed by wearing the walls of the pulpal chamber. In Group 2, the pulpal chamber was filled with composite and prepared to receive the Endocrown restoration. The surface areas were measured using an aluminium foil, the teeth were molded and ceramic Endocrowns were fabricated and bonded. The pull-off test was performed 24hs after the bonding procedure. The data obtained was submitted to Student´s t test and the result showed that there were differences between the groups, and group 2 (2030,95 +-223,24) N/cm² showed greater resistance to displacement than group 1 (1285+-313,21) N/cm². The filling of the pulp chamber increases resistance to displacement of Endocrowns submitted to the pull-off test
POR QUE CONTINUAR LENDO PAULO FREIRE NOS DIAS DE HOJE?
No full textPaulo Freire\u27s works contribute significantly to education, and his pedagogy stands out for being an instrument of criticality. However, some criticisms fall on the author, especially with regard to the quality of Brazilian education. Thus, the aim of this research is to discuss the importance and contribution of Paulo Freire\u27s pedagogy to education, with the opinion of teachers at the center of the debate. To achieve the objective, an interview was conducted with a group of teachers. We conclude that the readings on Paulo Freire aroused a teacher subject concerned with a more humanized education and centered on dialogue, as well as with the overthrow of the educational paradigm. In short, teachers began to identify themselves differently with the profession, so that being a teacher gained new meanings.As obras de Paulo Freire contribuem de maneira relevante para a educação, e sua pedagogia se destaca por ser um instrumento de criticidade. Entretanto, algumas críticas recaem sobre o autor, principalmente no que tange à qualidade da educação brasileira. Assim, o objetivo desta pesquisa é discutir a importância e a contribuição da pedagogia de Paulo Freire para a educação, tendo no centro do debate a opinião de professores. Para atingir o objetivo, foi realizada uma entrevista com um grupo de professores. Concluímos que as leituras sobre Paulo Freire despertaram um sujeito professor preocupado com uma educação mais humanizadora e centrada no diálogo, bem como na derrubada do paradigma educacional. Em suma, os professores passaram a se identificar de modo diferente com a profissão, de modo que ser professor ganhou novos significados.
 
Avaliação da preferência por resina composta ou cerâmica para restaurações de dentes anteriores
No full textTCC (graduação) - Universidade Federal de Santa Catarina. Centro de Ciências da Saúde. Odontologia.A estética tem papel importante e ganha destaque nos dias de hoje, a odontologia dedica suas buscas na melhoria e na tentativa de obter o material mais adequado para cada caso além do aperfeiçoamento de técnicas. Esses avanços têm permitido progressos impressionantes a nível das reabilitações orais, sendo possível restabelecer estética e função com pouca ou nenhuma perda de tecido sadio. As resinas compostas assim como as cerâmicas acompanham esse desenvolvimento possibilitando que o profissional avalie as diferentes situações e utilize o material mais apropriado para cada paciente. Essa escolha ainda gera grandes dúvidas nos cirurgiões-dentistas. O objetivo desse trabalho está baseado nessa dificuldade, visando demonstrar as propriedades, vantagens e as desvantagens de cada material, o seu emprego em restaurações estéticas de dentes anteriores, além de avaliar a relação de preferência de profissionais (n=30) e graduandos (n=30) por cada material. A coleta de dados desta pesquisa se deu através da aplicação de um questionário. Os participantes colaboraram respondendo questões sobre freqüência de uso, experiência de insucesso e taxa de insucesso nas restaurações de dentes anteriores com resina composta e cerâmica. Os resultados mostraram que a utilização da resina composta é mais frequente, tanto para graduandos quanto para profissionais. O custo mostrou-se como o principal fator que levou os participantes a escolherem este material. A experiência de insucesso dos profissionais mostrou-se maior em comparação aos graduandos e a taxa de insucesso foi superior a 50% para profissionais e graduandos. Na avaliação das fotos presentes no questionário, observou-se que nos casos onde tinham dentes restaurados, nenhum participante foi capaz de identificar todas as restaurações corretamente. O avanço dos materiais tem tornado a diferenciação entre dentes naturais e restaurados cada vez mais difícil, o que é uma grande conquista para a odontologia.Aesthetics play an important role and stands out these days, dentistry dedicated their quest to improve and try to get the most suitable material for each case in addition to the improvement techniques. These advances have allowed impressive progress in oral rehabilitation, it is possible to restore aesthetics and function with little or no loss of healthy tissue. The composites as well as ceramics accompany this development enabling the professional assess the different situations and use the most suitable material for each patient. This choice, despite the advancement of technologies, still generates serious doubts in dentists. The aim of this work is based on that difficulty, aiming to demonstrate the properties, advantages and disadvantages of each material, its use in aesthetic restorations of anterior teeth, besides assessing the professional preference relation (n = 30) and graduate students (n = 30) for each material. The data collection for this research was made through the application of a questionnaire, participants collaborated answering questions about frequency of use, failure of experience and failure rate in the restoration of anterior teeth with composite resin and ceramic. The results showed that the use of composite resin is more common both for graduates and for professionals, the cost proved to be the main factor that led participants to choose this material. The failure experience of the professionals was higher compared to undergraduates and the failure rate was over 50% for professionals and graduate students. In the evaluation of the photos present in the questionnaire it was observed that in cases where they had restored teeth, no participant was able to identify all the restorations properly. The advancement of materials has made the distinction between natural teeth and restored more and more difficult, which is a great achievement for dentistry
Measuring redundancy and its effect on resiliency analysis of a water distribution network
No full textWater distribution networks (WDN) are expected to perform its function even after seismic events as its service is essential, not only in keeping the welfare of the consumers, but also in performing disaster risk and management, and emergency operations. Hence, it is important that its service is uninterrupted even during and after a seismic event. To ensure uninterrupted service, WDN must adhere to resilient quality and standards. However, measuring the performance of WDN also poses a challenge as the structure of nodes and links that are interconnected, yet, responding independently to hazards.
As observed in developed countries, water distribution networks adhere to resiliency parameters such as robustness, redundancy, resourcefulness, and rapidity. Though no specific resiliency parameters are in place, several guidelines are established by the American Lifeline Alliance (ALA) and Japan Water Works Association (JWWA). For rank A facilities (such as main water distribution, transmission lines, distribution main lines), JWWA sets no light damage; or with light damage but functional; to light damage and may not be functional but can quickly recover its service as its target performance. ALA, on the other hand, sets low rate damage throughout the water system ensuring 90% of customers recover its water service within three days from a seismic event damage, and an amount of damage of 0.03 to 0.06 breaks per 1000 feet for 6-inch diameter pipes as its target performance.
Researchers, engineers, and field experts are also pushing for resilient water networks. Frameworks on resiliency and methodologies were presented to aid in quantifying the resiliency of water infrastructures. However, there is still a gap in measuring resiliency based on a framework that considered resiliency to be defined by robustness, redundancy, rapidity, and resourcefulness (4Rs). Though many have established resiliency quantification considering robustness, rapidity, and resourcefulness, there is a limited methodology that considers redundancy and its influence on WDN resiliency. It is critically important to include the influence of redundancy in WDN’s resiliency as the availability of a backup system can help ensure the continuity of functionality. Hence, this study focuses on measuring resiliency considering all 4Rs with emphasis on the influence of redundancy on it. Moreover, there is also a need for a continuous search for a tool to measure redundancy, as existing tools were shown to be not sensitive to parameters known to highly influence redundancy such as pipe capacity, number of alternative paths, and sources.
This study aimed to contribute in quantifying resiliency in water distribution networks by developing a novel method to measure resiliency. The method incorporates all 4Rs (i.e. robustness, redundancy, rapidity, and resourcefulness) in the resiliency quantification. Available tools are employed to measure robustness (e.g. PSHA, measurement of critical damage rate), rapidity (e.g. minimum spanning tree, and maximum slope method), and resourcefulness (accomplished through a survey). However, in measuring redundancy, due to the shortcoming of existing tools, a method is proposed to measure redundancy. The method involves measuring the probability of relative isolation of a demand node from a source node as links (or pipes) may
fail during a seismic event and the chance of maintaining connectivity is influenced by the backup capacity or alternative paths. Similarly, since resiliency quantification based on existing tools excludes redundancy, this study proposed a tool to measure resiliency with effects due to redundancy considered. Hence, a resiliency quantification that includes robustness, rapidity, resourcefulness, and redundancy can now be utilized as an output of this study.
The redundancy analysis, utilizing the method developed, was applied to 3 case study areas. It was shown that redundancy is highly influenced by the performance of links. Link’s performance (pipe capacity), expressed in terms of probability of failure, determines whether a path that leads to a node (connecting it from a source) may fail or not, rendering the node isolated if it fails. Another factor that affects redundancy is the availability of alternative paths, and strategic placement of additional source. Analysis results, however, showed that number of paths and links, are not as strongly as pipe capacity’s influence to connectivity.
Resiliency analysis was performed utilizing the method developed by the author/s that incorporates robustness, redundancy, rapidity, and resourcefulness. It was shown that better redundancy performance greatly improves the resiliency performance of a water distribution network as characterized by a resiliency index. Through the developed method to measure resiliency via resiliency index, it was shown that water distribution networks with good redundancy feature can improve the resiliency index of a water distribution network
Organic Acids in Aquaculture: A Bibliometric Analysis
No full textFish production faces various challenges throughout its cycle, from rearing to consumption. Organic acids have emerged as an effective fish feed and meat treatment solution. They promote health and well-being, control pathogens, improve digestion, and contribute to food preservation. This study was therefore carried out to evaluate the evolution of publications on the use of organic acids in aquaculture over time, identifying the leading journals, authors, countries, and relevant organizations associated with the publications and determining the keywords most used in publications and research trends on this type of accommodation using bibliometric analysis. For this analysis, the Web of Science (WoS) and Scopus databases were used, with the keywords and Boolean operators “organic acid*” AND (“pathogens” OR “microorganism*” OR “bacteria” OR “fungi”) AND (“fish” OR “fry” OR “pisciculture”). Ninety-six articles were found in 44 journals, with the participation of 426 authors and 188 institutions, from 1995 to 2024. The most crucial publication source with the highest impact factor was the journal Aquaculture, with 14 articles, 2 of which were written by the most relevant author, Koh C., who received the highest number of citations and had the highest impact factor among the 426 authors. China had the most scientific production, with 26 publications on organic acids in aquaculture. However, Malaysia was the country that published the most cited documents, a total of 386. The most relevant affiliation was the University of Sains Malaysia, which participated in the publication of eight articles. The 10 most frequent keywords were fish, organic acids, citric acid, article, bacteria, growth, microorganisms, Oncorhynchus mykiss, animals, and digestibility. The results indicate increased publications on the benefits of using organic acids in aquaculture, highlighting their effectiveness as antibacterial agents and promoters of zootechnical development. However, gaps still require more in-depth research into the ideal dosages, mechanisms of action, and long-term impacts of these compounds
