Fatigue life estimation of dental implants using a combination of the finite element method and traditional fatigue criteria.

Failure by fatigue can be sudden and catastrophic. Therefore, ensuring that dental implants, which are under constant cyclic loading, do not fail to fatigue is imperative. The majority of the studies about the topic only performed in vitro tests, which are expensive and time-consuming. The Finite Element (FE) method is less costly and it allows the simulation of several different loading scenarios. Nonetheless, there are only a few studies analysing fatigue in dental prostheses using FE models, and the few available did not include all the relevant parameters, such as geometry effect, surface finishing, etc. Therefore, this study aimed to analyse the fatigue behaviour of a single-unit dental implant with two screws using a combination of the numerical results and the traditional fatigue criteria - a combination that was not yet fully and correctly explored. A finite element model comprising a single implant, one abutment, one abutment screw, one fixation screw and one prosthetic crown was developed. Material properties were assigned based on literature data. A 100 N load was applied to mimic the mastication forces and fatigue analysis was conducted using the Gerber, Goodman and Soderberg fatigue criteria. The fatigue analysis demonstrated that the abutment screw could fail in less than 1 year, depending on the criteria, while the fixation screw exhibits an infinite life. The results illustrated the importance of analysing the fatigue behaviour of dental implants and highlighted the potential of finite element models to simulate the biomechanical behaviour of dental implants.

Bioabsorbable Polymeric Stent for the Treatment of Coarctation of the Aorta (CoA) in Children: A Methodology to Evaluate the Design and Mechanical Properties of PLA Polymer.

This study presents a methodology that combines experimental tests and the finite element method, which is able to analyse the influence of the geometry on the mechanical behaviour of stents made of bioabsorbable polymer PLA (PolyLactic Acid) during their expansion in the treatment of coarctation of the aorta (CoA). Tensile tests with standardized specimen samples were conducted to determine the properties of a 3D-printed PLA. A finite element model of a new stent prototype was generated from CAD files. A rigid cylinder simulating the expansion balloon was also created to simulate the stent opening performance. A tensile test with 3D-printed customized stent specimens was performed to validate the FE stent model. Stent performance was evaluated in terms of elastic return, recoil, and stress levels. The 3D-printed PLA presented an elastic modulus of 1.5 GPa and a yield strength of 30.6 MPa, lower than non-3D-printed PLA. It can also be inferred that crimping had little effect on stent circular recoil performance, as the difference between the two scenarios was on average 1.81%. For an expansion of diameters ranging from 12 mm to 15 mm, as the maximum opening diameter increases, the recoil levels decrease, ranging from 10 to 16.75% within the reported range. These results point out the importance of testing the 3D-printed PLA under the conditions of using it to access its material properties; the results also indicate that the crimping process could be disregarded in simulations to obtain fast results with lower computational cost and that new proposed stent geometry made of PLA might be suitable for use in CoA treatments-the approach that has not been applied before. The next steps will be to simulate the opening of an aorta vessel using this geometry.

Bioabsorbable polymeric Stent for the treatment of Coarctation of the Aorta (CoA) in children: A methodology to evaluate the design and mechanical properties of PLA polymer

This study presents a methodology that combines experimental tests and the finite element method, which is able to analyse the influence of the geometry on the mechanical behaviour of stents made of bioabsorbable polymer PLA (PolyLactic Acid) during their expansion in the treatment of coarctation of the aorta (CoA). Tensile tests with standardized specimen samples were conducted to determine the properties of a 3D-printed PLA. A finite element model of a new stent prototype was generated from CAD files. A rigid cylinder simulating the expansion balloon was also created to simulate the stent opening performance. A tensile test with 3D-printed customized stent specimens was performed to validate the FE stent model. Stent performance was evaluated in terms of elastic return, recoil, and stress levels. The 3D-printed PLA presented an elastic modulus of 1.5 GPa and a yield strength of 30.6 MPa, lower than non-3D-printed PLA. It can also be inferred that crimping had little effect on stent circular recoil performance, as the difference between the two scenarios was on average 1.81%. For an expansion of diameters ranging from 12 mm to 15 mm, as the maximum opening diameter increases, the recoil levels decrease, ranging from 10 to 16.75% within the reported range. These results point out the importance of testing the 3D-printed PLA under the conditions of using it to access its material properties; the results also indicate that the crimping process could be disregarded in simulations to obtain fast results with lower computational cost and that new proposed stent geometry made of PLA might be suitable for use in CoA treatments-the approach that has not been applied before. The next steps will be to simulate the opening of an aorta vessel using this geometry.

Clinimetric properties of the knee extension prone test (KEPT): A new method to assess knee hyperextension deficit.

INTRODUCTION: The knee extension prone test (KEPT) can be a low-cost and affordable alternative for this assess knee hyperextension deficit. OBJECTIVE: To analyze concurrent validity and reliability of a new method for assessing knee extension prone (knee extension prone test; KEPT). METHODS: Participants were divided into two groups: Group 1 comprised healthy participants (HG) and Group 2 comprised participants with a history of knee injury (IG). Two examiners performed the following evaluations: (1) lateral knee goniometry, (2) anterior tibial inclinometry, (3) lateral photogrammetry in supine, (4) lateral photogrammetry in prone, and (5) KEPT. Concurrent validity was analyzed by Pearson's linear correlation coefficient (r), and intra- and inter-examiner reliability were analyzed by intraclass correlation coefficient (ICC). RESULTS: KEPT demonstrated good intra-examiner (ICC = 0.85, 95% CI = 0.75-0.89) and excellent inter-examiner (ICC = 0.92, 95% CI = 0.88-0.94) reliability. The standard error of measurement was 0.47° and 1.30° and the minimum detectable change was 2.35° and 6.5° for intra- and inter-examiner agreement, respectively. Concurrent validity of KEPT ranged from moderate to good (r = 0.54-0.78, p < 0.01). CONCLUSION: KEPT is a valid and reliable method for assessing knee hyperextension deficit in both healthy individuals and patients with knee injuries.

As ocupações das escolas e suas formas inéditas de revolta / School occupations and their original forms of revolt / Les occupations juvéniles et leurs formes originales de révolte / Las ocupaciones de escuelas y sus nuevas formas de revuelta

Resumo Este trabalho apresenta uma reflexão acerca da emergência de novas discursividades no campo político com o movimento de ocupações de escolas no Brasil, entre 2015 e 2016, considerando a dimensão utópica presente nessas experiências estudantis que se conjugaram a partir da posição de um não-saber. Articula-se com registros bibliográficos, fotográficos e audiovisuais, convocando o pensamento para uma conversa entre política e utopia.

Abstract This paper reflects on the emergence of new political discourses regarding students' lived experience of school occupations in Brazil, between 2015 and 2016, considering their utopic content built upon a not-knowing position. The text articulates bibliographic research, photographic and audio-visual records, inviting a debate about politics and utopia.

Résumé Cet article réfléchit à l'émergence de nouveaux discours politiques concernant les occupation juvéniles dans les écoles au Brésil, entre 2015 et 2016, en considérant leur contenu utopique construit sur une position de non-savoir. Le texte articule des recherches bibliographiques, des enregistrements photographiques et audiovisuels, invitant à un débat sur la politique et l'utopie.

Resumen Este trabajo presenta una reflexión sobre las urgencias de las nuevas discursividades en el campo político a partir del movimiento de ocupaciones de escuelas en Brasil, entre 2015 y 2016, considerando la dimensión utópica presente en estas experiencias de los estudiantes que están intercaladas a partir de la posición de un no-saber. Para ello, se utilizan bibliografía, registros fotográficos y audiovisuales, que estimulan la discusión entre política y utopía.

Novel and simplified optimisation pathway using response surface and design of experiments methodologies for dental implants based on the stress of the cortical bone.

Dental implants are widely used as a long-term treatment solution for missing teeth. A titanium implant is inserted into the jawbone, acting as a replacement for the lost tooth root and can then support a denture, crown or bridge. This allows discreet and high-quality aesthetic and functional improvement, boosting patient confidence. The use of implants also restores normal functions such as speech and mastication. Once an implant is placed, the surrounding bone will fuse to the titanium in a process known as osseointegration. The success of osseointegration is dependent on stress distribution within the surrounding bone and thus implant geometry plays an important role in it. Optimisation analyses are used to identify the geometry which results in the most favourable stress distribution, but the traditional methodology is inefficient, requiring analysis of numerous models and parameter combinations to identify the optimal solution. A proposed improvement to the traditional methodology includes the use of Design of Experiments (DOE) together with Response Surface Methodology (RSM). This would allow for a well-reasoned combination of parameters to be proposed. This study aims to use DOE, RSM and finite element models to develop a simplified optimisation analysis method for dental implant design. Drawing on data and results from previous studies, two-dimensional finite element models of a single Branemark implant, a multi-unit abutment, two prosthetic screws, a prosthetic crown and a region of mandibular bone were built. A small number of combinations of implant diameter and length were set based on the DOE method to analyse the influence of geometry on stress distribution at the bone-implant interface. The results agreed with previous studies and indicated that implant length is the critical parameter in reducing stress on cortical bone. The proposed method represents a more efficient analysis of multiple geometrical combinations with reduced time and computational cost, using fewer than a third of the models required by the traditional methods. Further work should include the application of this methodology to optimisation analyses using three-dimensional finite element models.

Um país de maravilhas! O infantil da utopia / A country of wonders! The infantile of utopia / Un pays de merveilles! L'enfantile de l'utopia / ¡Un país de maravillas! El infantil de la utopia

Neste ensaio procuramos construir alguns laços entre o infantil na concepção psicanalítica e o universo das utopias. A partir da versão cinematográfica de Alice no país das maravilhas de Jam Švankmajer - em que o autor consegue nos oferecer uma perspectiva do universo carroliano de Alice, aproximado do sonho e do brincar das crianças na concepção freudiana - procuramos aproximar o infantil e a utopia, relacionando o "País das maravilhas" apresentado por Švankmajer, da ilha Utopia, de Morus, no sentido de demonstrar como o infantil permite o acesso às construções utópicas a partir de um corte ou furo nas palavras-imagens do infantil, como exigência de criação, pelo brincar, de um litoral que nos dá acesso a ilhas, territórios que resistem à literalidade das formas instituídas da realidade, como utopia.

In this essay, we have aimed at building a few connections between the psychoanalytical conception of the infantile and the utopian universe. Based on Jam Švankmajer's cinematographic version of Alice in Wonderland - which offers a perspective of Lewis Carroll's universe of Alice that comes close to Freud's concept of dreams and child's play - we tried to find connections between the infantile and utopia by relating Švankmajer's "Wonderland" to Morus' island of Utopia to show how the infantile allows to access utopian constructions by a cut or hole in the word-images of the infantile, as a demand to create, through play, a coastline that gives us access to islands, territories that resist the literality of the instituted shapes of reality, such as utopia does.

Dans cet essai, nous cherchons à tisser quelques liens entre l'infantile de la notion psychanalytique et l'univers des utopies. Sur la base de la version cinématographique d'Alice au pays des Merveilles de Jam Švankmajer - dans laquelle l'auteur nous offre une perspective de l'univers carrollien d'Alice semblable au rêve et au jeu d'enfants du point de vue freudien -, nous essayons d'approcher l'infantile et l'utopie en établissant un rapport entre «Le Pays de Merveilles¼, présenté par Švankmajer et l'île «Utopia¼ de Morus. Ainsi, nous visons à montrer comment l'infantile donne accès à des constructions utopiques grâce à une coupure ou à la percée d'un trou dans les mots-images de l'infantile, menée comme une exigence de la création, par le jeu, d'une côte qui offre accès à des îles, des territoires qui résistent à la littéralité des formes établies par la réalité, c'est-à-dire l'utopie.

En este ensayo, buscamos construir algunos lazos entre lo infantil, en la concepción psicoanalítica, y el universo de las utopías. A partir de la versión cinematográfica de Alicia en el país de las maravillas, de Jam Švankmajer; en donde el autor logra ofrecernos una perspectiva del universo carroliano de Alice, alrededor del sueño y del jugar de los niños en la concepción freudiana, buscamos aproximar lo infantil y la utopía, relacionando el "País de las maravillas", presentado por Jam Švankmajer, con la isla de Utopía, de Moro, con la intención de demostrar cómo lo infantil abre el acceso a las construcciones utópicas a partir de un corte o agujero en las palabras/imágenes de lo infantil, como exigencia de la creación, por el jugar, de un litoral que nos da acceso a islas, territorios que se resisten a la literalidad de las formas instituidas de la realidad, como utopía.

História, narrativa, resistência e utopia em Georges Perec / History, narrative, resistance and utopia in Georges Perec

O presente artigo pretende trabalhar a articulação entre história e resistência na obra de Georges Perec, para pensar a potência utópica de seus textos. O autor submete a si e ao leitor às contraintes, que vão construindo um caminho individual numa jornada percorrida conjuntamente, escritor e leitor. Caminho que nos aproxima da leitura psicanalítica sobre o tempo e a história para pensarmos construções de narrativas. Perec transita no limite entre o Real da letra e o Simbólico do nome. Letra que faz operar um não-lugar, possibilidade de narrar, ou seja, através de a escrita da ficção poder se contar, o que implica acessar uma memória que também é coletiva, problematizando, assim, a relação com a história.(AU)

This article intends to work the relationship between history and resistance in the work of Georges Perec to think about the utopian power of his texts. The author submits himself and the reader to contraintes, constructing an individual pathway in a journey journeyed together of writer and reader. This is a road that brings us closer to the psychoanalytical reading about time and history to think of the narratives construction. Perec moves in the boundaries between the Real of the letter and the Symbolic of the name. A letter that makes a non-place work, the possibility of narrating, i.e. through the writing of fiction to be able to tell, which implies accessing a memory that is also collective, thus questioning the relationship with history.(AU)

Aceitação do consumidor de linguiça suína defumada no município de Boa Vista - RR / Consumer acceptance of defumation pork sausage in the municipality of Boa Vista - RR

O objetivo foi avaliar a aceitabilidade, perante o mercado consumidor de duas amostras de linguiça suína, uma previamente assada e a outra somente defumada. O processo de defumação foi realizado em uma temperatura média 70°C por 11 horas. Foram aplicados 64 questionários em diferentes locais (Faculdade Estácio Atual da Amazônia, Campus Paricarana da UFRR e Campus Cauamé da UFRR). Quando questionados sobre a frequência do consumo de linguiça suína a maioria dos entrevistados 24 (37,5%) relataram que raramente a consomem e 17 (26,6%) afirmaram que consome uma vez a cada 15 dias. Foi observado que a maioria 31 (48,4%) dos entrevistados escolheram a amostra 2 (linguiça suína defumada) e 29 (45,3%) pessoas pela a amostra 1 (linguiça assada). Conclui-se que a linguiça suína defumada teve preferência maior que a não defumada.

Relato de uma experiência em Bonneuil: o olhar que dá lugar / Relato de una experiencia en Bonneuil: la mirada que da luga / Story of an experience in Bonneuil the look that gives place

Este artigo é sobre uma experiência de estágio realizada na Escola Experimental de Bonneuil-sur-Marne, fundada pela psicanalista Maud Mannoni e que acolhe crianças psicóticas, autistas ou com neuroses graves. Trata-se do relato de uma viajante sobre o seu encontro com o estrangeiro, com o estranho familiar, com a loucura e de suas tentativas de fazer laço com o outro. Foi no encontro com algumas crianças que as pontes e os pontos de contato foram criados pelo território dos orifícios pulsionais, sendo o olhar o enlaçamento primordial.

Este artículo versa sobre una experiencia de prácticas realizada en la Escuela Experimental de Bonneuil-sur-Marne, fundada por la psicoanalista Maud Mannoni y que acoge a niños psicóticos, a autistas o con neurosis graves. Se trata del relato de una viajera sobre su encuentro con el extranjero, con el extraño familiar, con la locura y sus intentos de hacer el lazo con el otro. En el encuentro con algunos niños, los puentes y los puntos de contacto fueron creados por el territorio de los orificios pulsionales, siendo la mirada el enlazado primordial.

This article is about an internship experience held at the Bonneuil-sur-Marne Experimental School, founded by the psychoanalyst Maud Mannoni and which welcomes psychotic, autistic or severely neurotic children. It is about a traveler's story and her encounter with the foreign, with the familiar stranger, with the madness and her attempts to tie in with the other. It was in the meeting with some children that the bridges and the points of contact were created by the territory of the driving holes, being the look the primordial entanglement.

Objetos (in)visíveis: psicanálise, espetáculo e a arte de Vik Muniz / (In)visible objects: psychoanalysis, spectacle and the art of Vik Muniz / Objeto (in)visible: psicoanálisis, espectáculo y el arte de Vik Muniz / Objets (in)visibles: psychanalyse, spectacle et l'art de vik muniz

As questões propostas neste ensaio nascem de três encontros: o primeiro, com a teoria lacaniana a respeito da constituição do sujeito a partir do campo do Outro; o segundo, com a obra de Guy Debord sobre A Sociedade do Espetáculo; o terceiro, com o trabalho do artista brasileiro Vik Muniz. O que une esses três encontros é o desejo de pensar nas relações do sujeito com o social e nas questões que suscitam a respeito do laço social em nossa sociedade capitalista, na qual visibilidade e cidadania se confundem com a capacidade de consumo. Se o sujeito depende do olhar do outro para se estruturar, e é o poder aquisitivo que, nesse contexto, lhe dá lugar no espaço público, já não basta consumir, é preciso mostrar aquilo que se consome, transformando a si mesmo em objeto consumível. Este ensaio propõe que o espetáculo, conforme o definiu Debord, é o modo como o laço social se apresenta a partir da estrutura que Lacan definiu como discurso capitalista, e que produz efeitos de reificação e de apagamento da singularidade do sujeito através da antecipação de respostas para as questões que o desejo coloca. No entanto, nem todas as imagens que vemos são iguais, nem todas estão submetidas à lógica espetacular. A arte propõe imagens a partir de outro lugar, compartilhado com a psicanálise: aquele que busca desestabilizar o eixo dos discursos prontos e das produções de sentido. E é esta também a proposta de trabalho de Vik Muniz ao criar ilusões que não iludem, mas revelam os elementos que as constituem. Assim, diante dos imperativos do espetáculo, da arte e da psicanálise, ao sustentarem a potência do nome que falta, possibilitam que o sujeito de desejo encontre brechas por onde resistir.

The questions proposed in this essay arise from three meetings: the first, with the Lacanian theory regarding the constitution of the subject from the field of the Other; the second, with Guy Debord's The Society of the Spectacle; the third, with the work of Brazilian artist Vik Muniz. What unites these three meetings is the desire to think about the relations of the subject with the social and the issues that raise about the social bond in our capitalist society, in which visibility and citizenship are mixed with the capacity of consumption. If the subject depends on the other's eyes to structure, and it is the purchasing power that, in this context, gives him place in the public space, it is not enough to consume, it is necessary to show what is consumed, transforming itself into consumable object. This essay proposes that the spectacle, as defined by Debord, is the way in which the social bond presents itself from the structure that Lacan defined as capitalist discourse, and which produces effects of reification and erasure of the singularity of the subject through the anticipation of responses to the questions that the desire poses. However, not all the images we see are the same, not all of them are subjected to spectacular logic. Art proposes images from another place, shared with psychoanalysis: the one that seeks to destabilize the axis of the ready discourses and the productions of meaning. And this is also the proposal of Vik Muniz's work in creating illusions that do not deceive, but reveal the elements that constitute them. Thus, in view of the imperatives of the spectacle, art and psychoanalysis, in sustaining the power of the missing name, they enable the subject of desire to find loopholes to resist.

Las cuestiones propuestas en este ensayo nacieron de tres encuentros: el primero, con la teoría lacaniana relacionada con la constitución del sujeto a partir del campo del Otro; el segundo, con la obra de Guy Debord sobre La Sociedad del Espectáculo; el tercero, con el trabajo del artista brasileño Vik Muniz. Lo que une estos tres encuentros es el deseo de pensar en las relaciones del sujeto con el social y en las cuestiones que suscitan a respecto del lazo social en nuestra sociedad capitalista, en la cual visibilidad y ciudadanía se confunden con la capacidad de consumo. Si el sujeto depende de la mirada del otro para estructurarse, y es el poder adquisitivo que, en este contexto, le da lugar en el espacio público, consumir ya no es lo suficiente. Es necesario enseñar lo que se consume, transformando a si mismo en objeto consumible. Este ensayo propone que el espectáculo, según definición de Debord, es el modo como el lazo social se presenta a partir de la estructura que Lacan definió como discurso capitalista, y que produce efectos de reificación y de supresión de la singularidad del sujeto por medio de la anticipación de respuestas para las cuestiones que el deseo impone. Sin embargo, no todas las imágenes que vemos son iguales, ni todas están sometidas a la lógica espectacular. El arte propone imágenes a partir de otro lugar, compartidos con el psicoanálisis: aquel que busca desestabilizar el eje de los discursos listos y de las producciones de sentido. Esta también es la propuesta de trabajo de Vik Muniz al crear ilusiones que no ilusionan, pero revelan los elementos que las constituyen. Así, ante los imperativos del espectáculo, del arte y del psicoanálisis, al sostener la potencia del nombre que falta, posibilitan que el sujeto de deseo encuentre huecos por donde resistir.

Les questions proposées chez cet essai découlent de trois rencontres: la première, avec la théorie lacanienne par rapport à la constitution du sujet à partir de l'Autre; la seconde, avec l'oeuvre de Guy Debord sur La Société du spectacle et la troisième, avec le travail de l'artiste brésilien Vik Muniz. Ce qui unit ces trois rencontres, c'est le désir de réfléchir aux relations du sujet avec le social et aux questions qui se posent par rapport au lien social dans notre société capitaliste, où la visibilité et la citoyenneté se mélangent avec la capacité de consommation. Si le sujet dépend du regard de l'autre pour se structurer, et s'il est le pouvoir d'achat qui, dans ce contexte, lui donne une place dans l'espace public, il ne suffit plus de consommer, il faut montrer ce qui est consommé, en transformant soi-même dans un objet consommable. Cet essai propose que le spectacle, tel que défini par Debord, est la manière comme le lien social se présente à partir de la structure définie par Lacan comme discours capitaliste, ce qui produit des effets de réification et d'effacement de la singularité du sujet par l'anticipation des réponses aux questions posées par le désir. Pourtant, la plupart des images qu'on voit ne sont pas identiques, elles ne sont pas toutes soumises à une logique spectaculaire. L'art propose des images à partir d'un autre lieu, ce qui est partagé avec la psychanalyse, lequel cherche à déstabiliser l'axe des discours préparés et des productions de sens. Et c'est aussi la proposition du travail de Vik Muniz, quand il croit des illusions qui ne trompent pas, mais révèlent les éléments qui les constituent. Ainsi, face aux impératifs du spectacle, de l'art et de la psychanalyse, qui soutiennent le pouvoir du nom manquant, ils permettent le sujet du désir de trouver des échappatoires où il peut résister.

Sobre(vivência) da Violência: Os Rastros Silenciados da Ditadura Civil-Militar Brasileira / Survival of Violence: The Silenced Traces of the Brazilian Civil-Military Dictatorship / Súper(vivencia) de la Violencia: Las Huellas Silenciadas de la Dictadura Civil-Militar Brasileña / Sur(Vie) de la Violence: Des Silencieux Traces de la Dictature Civile-Militaire Brésilienne

A violência de Estado exercida ao longo do período da ditadura civil-militar brasileira deixou como consequência inúmeras marcas e não ditos sociais, além da produção de um trauma individual àqueles que sofreram diretamente com a violência imposta e com o desaparecimento dos seus familiares. Nessa via, ao adentrarmos no campo do traumático, tornou-se essencial aproximarmo-nos da história e do passado, sem ceder ao silenciamento imposto. Dessa forma, no referido artigo, buscou-se abrir espaços para demarcar o que não quer ser visto, ou lembrado, em uma sociedade, visando à apresentação de uma contra-história da ditadura civil-militar brasileira imersa em questionamentos e reflexões que permitam o vislumbrar de outro lugar, cercado de ressignificações, as vidas que foram silenciadas, torturadas, mortas e desaparecidas e, consequentemente, a sociedade brasileira. Diante desses objetivos, buscou-se como fio condutor de nossa reflexão o campo dos estudos utópicos na medida em que este propõe um método de leitura crítica da história, apontando seus mecanismos de repetição e, ao mesmo tempo, abrindo espaço para outras narrativas possíveis e que indicam um desejo de transposição. Dessa forma, visou-se identificar as contradições existentes no âmbito social, circunscrevendo assim um lugar de crise. Assim, nos aproximamos, nesse ponto, da proposta de Walter Benjamin de ler a história a contrapelo. Nessa via, retomaram-se os aspectos históricos da ditadura civil-militar, as violências, o campo do traumático e suas possíveis formas de transmissão. Em seguida, iniciou-se o processo de análise dos inúmeros não ditos sociais perpetrados no período ditatorial através da valorização da memória, dos restos e dos rastros. Em vias de conclusão, evidenciou-se as dificuldades da sociedade brasileira em se ocupar com o traumático imposto pelas violências exercidas na ditadura e as suas consequências na democracia e, assim, apontou-se a criação e a atuação da Comissão Nacional da Verdade como uma tentativa de inscrição de uma contra-história que valorize a narrativa e o testemunho daqueles que foram silenciados pelo traumático.

The violence of the State during the period of the Brazilian civil-military dictatorship left as a consequence innumerable marks and not social sayings, besides the production of an individual trauma to those who suffered directly with the imposed violence and with the disappearance of their relatives. In this way, as we entered the field of the traumatic, it became essential to approach history and the past, without yielding to the silencing imposed. Thus, in this article, we sought to open spaces to demarcate what does not want to be seen or remembered in a society, aiming at presenting a counter-history of the Brazilian civil-military dictatorship immersed in questions and reflections that allow to glimpse from another place, surrounded by resignifications, the lives that were silenced, tortured, died and disappeared and, consequently, Brazilian society. In view of these objectives, the field of utopian studies was sought as the guiding thread of our reflection insofar as it proposes a method of critical reading of history, pointing out its mechanisms of repetition and, at the same time, opening space for other possible narratives and which indicate a desire for transposition. In this way, the aim was to identify the contradictions existing in the social sphere, thus circumscribing a place of crisis. Thus, we approach, at this point, the proposal of Walter Benjamin to read history against the grain. In this way, the historical aspects of the civil-military dictatorship, the violence, the traumatic field and its possible forms of transmission were resumed. Then the process of analysis of the numerous social non-sayings perpetrated in the dictatorial period through the valorization of memory, remains and traces began. The Brazilian society's difficulties in dealing with the traumatic violence imposed on the dictatorship and its consequences on democracy were highlighted, and the creation of the National Truth Commission was pointed out as an attempt to inscribe a counter-history that values the narrative and testimony of those who have been silenced by the traumatic.

La violencia del Estado ejercida a lo largo del período de la dictadura civil-militar brasileña dejó como consecuencia incontables marcas y secretos sociales, además del trauma individual provocado en aquellos que sufrieron directamente con la violencia impuesta y con el desaparecimiento de sus familiares. En esa vía, al adentrarnos en el campo del traumático, se hizo necesario acercarnos a la historia y al pasado, sin dar paso al silenciamiento impuesto. Así, en este artículo, se buscó abrir espacios para demarcar lo que no se quiere ser visto, o recordado, en una sociedad, objetivando la presentación de una contra-historia de la dictadura civil-militar brasileña inmersa en cuestionamientos y reflexiones que permitan el vislumbre de otro lugar, cercado de resignificaciones, las vidas que fueron calladas, torturadas, muertas y desaparecidas y, consecuentemente, la sociedad brasileña. Ante estos objetivos, se buscó como hilo conductor de nuestra reflexión el campo de los estudios utópicos al paso en que este propone un método de lectura crítica de la historia, apuntando sus mecanismos de repetición y, al mismo tiempo, abriendo espacio para otras narrativas posibles y que indican un deseo de transposición. De esa forma, se objetivó identificar las contradicciones existentes en el ámbito social, limitando así un lugar de crisis. Nos acercamos, en este punto, de la propuesta de Walter Benjamin de leer la historia a contrapelo. En esta vía se retomaron los aspectos históricos de la dictadura civil-militar, las violencias, el campo del traumático y sus posibles formas de transmisión. En seguida, se inició el proceso de análisis de los incontables secretos sociales perpetrados en el período dictatorial por medio de la valorización de la memoria, de los restos y de las huellas. En conclusión, se evidenció las dificultades de la sociedad brasileña en ocuparse con el traumático impuesto por las violencias ejercidas en la dictadura y sus consecuencias en la democracia y, así, se indicó la creación de la Comisión Nacional de la verdad como un intento de inscripción de una contra-historia que valorice la narrativa y el testimonio de aquellos que fueron calados por el traumático.

La violence d'État exercée pendant la période de la dictature civile-militaire brésilienne a laissé conséquence de nombreuses marques sociales, ainsi que la production d' un traumatisme chez ceux qui ont souffert directement avec la violence imposée à eux et avec le disparition de leurs familles. Dans ce sens, quand on rentre dans le domaine des traumatismes, c'est indispensable d'aborder l'histoire et le passé, sans céder au silence forcé. De cette façon, dans cet article, on a cherché à ouvrir des espaces pour délimiter ce qui ne veut pas être vu, ou rappelé, dans une société, visant à la présentation d'une contre-histoire de la dictature civil-militaire brésilienne immergée dans les questions et réflexions qui permettent apercevoir chez d'autre endroit, entouré de signification, les vies qui ont été réduites au silence, torturées, tuées et disparues et, par conséquence, la propre société brésilienne . Devant ces objectifs, on a cherché comme fil conducteur de notre réflexion, le domaine d'études utopiques à mesure où il propose une méthode de lecture critique de l'histoire, et montre ses mécanismes de répétition et, en même temps, donne place aux autres récits possibles et indiquent un désir de transposition. De cette façon, on a cherché à identifier les contradictions existantes dans la sphère sociale, circonscrivant ainsi un lieu de crise. Donc, on s'approche, à ce point, de la proposition de Walter Benjamin de lire l'histoire à contre-courant. En ce sens, on a reprit les aspects historiques de la dictature civil-militaire, de la violence, du champ traumatique et leurs formes possibles de transmission. Ensuite, on a commencé le processus d'analyse de nombreux non-dits sociaux commis dans la période dictatoriale par la récupération de la mémoire, des restes et des traces. Comme conclusion, des difficultés de la société brésilienne en ce qui concerne la violence traumatique imposée par la dictature et ses conséquences dans la démocratie ont été soulignées. Ainsi, on a attiré l'attention au travail de la Commission Nationale de Vérité comme un essai d'une contre-histoire qui souligne le récit et le témoignage de ceux qui ont été réduits au silence par le traumatisme.

Psicanálise: uma vocação utópica / Psychanalyse: une vocation utopique / Psicoanálisis: una llamada utópica / Psychoanalysis: a Utopian vocation

Resumo Este trabalho surge com o intuito de problematizar a psicanálise como método de interrogação do sujeito, propondo uma reflexão sobre as formas como a própria psicanálise porta uma vocação utópica, enquanto ferramenta política, a partir de sua visão acerca do sujeito e da proposição de uma ética. Propomo-nos a analisar de que forma os regimes econômicos lapidaram as subjetividades. Movimentos de resistência a essas lógicas de silenciamento da vida têm surgido, abrindo novos espaços simbólicos para um pensamento de práticas utópicas e suas reverberações éticas para uma política de vida.

Résumé Ce travail vise à problématiser la psychanalyse en tant que méthode d'interrogation du sujet, en proposant une réflexion sur la question de savoir sous quelles formes la propre psychanalyse porte une vocation utopique, comme un outil politique, à partir de sa vision du sujet et de la proposition d'une éthique. Nous proposons d'examiner comment les régimes économiques ont taillé des subjectivités. Des mouvements de résistance à ces logiques de faire taire la vie ont émergé, en ouvrant de nouveaux espaces symboliques pour une pensée des pratiques utopiques et leurs réverbérations éthiques pour une politique de la vie.

Resumen Este trabajo surge con el fin de problematizar el psicoanálisis como método de interrogación del sujeto, proponiendo una reflexión acerca de la forma en que el propio psicoanálisis conlleva una vocación utópica, en cuanto herramienta política, a partir de su visión acerca del sujeto y de la proposición de una ética. Nos proponemos a analizar la manera en que los regímenes económicos lapidaron las subjetividades. Movimientos de resistencia a esta lógica de silenciamiento de la vida han surgido, cediendo el paso a nuevos espacios simbólicos para un pensamiento de prácticas utópicas y sus repercusiones éticas para una política de vida.

Abstract This study aims to problematize psychoanalysis as a method of interrogation of the subject, proposing a reflection on the ways that psychoanalysis itself carries a Utopian vocation, whilst being a political tool, from its view about the subject and the proposition of an ethic. We aim to examine how economic regimes formed subjectivities. Resistance movements to these types of life silencing logic have emerged, opening new symbolic spaces to think about Utopian practices and their ethical reverberations to the politics of life.

Conexões: transformações do objeto da arte / Connections: transformations of the art object

Resumo: Este artigo é resultado de uma pesquisa de doutorado, envolvendo a temática da arte nos anos 70, nos contextos brasileiro e espanhol. Sustentada pela teoria e método da psicanálise, analisa obras de dois artistas brasileiros e de um grupo de artistas catalães. Reflete sobre as contingências de determinados atos de criação, bem como sobre os ideais utópicos que esses artistas colocaram em cena. Além disso, analisa que as transformações propiciadas pela arte contemporânea transformam a própria concepção de objeto de arte, aproximando-se do que em psicanálise denomina-se como objeto a.

Abstract: This article is the result of a doctoral research involving the theme of art in the 70s, the Brazilian and Spanish contexts. Supported by theory and method of psychoanalysis, analyzes works of two Brazilian artists and a group of Catalan artists. Reflects about the contingencies of certain acts of creation, as well as the utopian ideals that these artists put into play. It analyzes that the transformations brought about by contemporary art transform the concept of art object, approaching to what in psychoanalysis is called as object a.

Atravessar desertos – psicanálise e utopia / Crossing deserts – psychoanalysis and utopia

Este artigo propõe a ideia de deserto como metáfora possível de lugares totalitários, nos quais as imagens se apresentam como imperativas e prescritivas. Este tem sido um cenário muito presente na atual situação política de nosso país. Em que medida o campo dos estudos utópicos e da psicanálise pode trazer ferramentas críticas para identificarmos e atravessarmos estes desertos? Procuramos dialogar com a reflexão de Pierre Naville em seu livro A revolução e os intelectuais (1975), em que propõe o célebre slogan: "É preciso organizar o pessimismo". (AU)

This paper proposes the idea of desert as a possible metaphor for totalitarian places, where images are presented as imperative and prescriptive. This has been a very present scenario in the current political situation in our country, Brazil. To what extent can the field of utopian studies and psychoanalysis provide critical tools for identifying and traversing these deserts? We sought to dialogue with Pierre Naville’s reflection in his book The Revolution and the Intellectuals (1975), in which he proposes the famous slogan: "It is necessary to organize pessimism". (AU)

Giant appendiceal mucinous cystadenoma treated by laparoscopy: a case report and review of the literature / Cistadenoma mucinoso apendicular gigante tratado por laparoscopia: relato de caso e revisão de literatura

ABSTRACT Appendiceal mucinous cystadenoma is a rare entity, which causes appendicular mucocele. It is more frequent in women over 50 years old. In half of the cases it is asymptomatic. Tomography of the abdomen is the gold standard in its preoperative diagnosis. The treatment is surgical, with good prognosis, the complete resection evolves without appendicular rupture and extravasation. We report a case of a 64-year-old man with appendiceal mucinous cystadenoma. A laparoscopic right hemicolectomy was performed. This therapy that can be safely used to treat appendiceal mucocele, as long as it is cautious.

RESUMO O cistadenoma mucinoso apendicular é entidade rara que causa mucocele apendicular, sendo mais frequente em mulheres acima dos 50 anos. Em metade dos casos, o cistadenoma mucinoso apendicular é assintomático. A tomografia do abdome é o padrão-ouro para um diagnóstico pré-operatório. O tratamento é cirúrgico e tem bom prognóstico; a ressecção completa evolui sem ruptura apendicular e sem extravasamento. Relatamos um caso de paciente homem de 64 anos com cistadenoma mucinoso apendicular. Foi realizada hemicolectomia laparoscópica direita. Esse é um procedimento que pode ser usado com segurança no tratamento de mucocele apendicular, desde que seja executado com cautela.

Atravessar desertos - psicanálise e utopia / Crossing deserts - psychoanalysis and utopia / Atravesar desertos - psicoanálisis y utopía

Este artigo propõe a ideia de deserto como metáfora possível de lugares totalitários onde as imagens se apresentam como imperativas e prescritivas. Tem sido este um cenário muito presente na atual situação política de nosso país. Em que medida o campo dos estudos utópicos e da psicanálise podem trazer ferramentais críticas para identificarmos e atravessarmos esses desertos? Procuramos dialogar com a reflexão de Pierre Naville em seu livro A revolução e os intelectuais, no qual propõe o célebre slogan “É preciso organizar o pessimismo”.

This paper proposes the idea of desert as a possible metaphor of totalitarian places where images are presented as imperative and prescriptive. This has been a very present scenario in the current political situation in our country. To what extent can the field of utopian studies and psychoanalysis provide critical tools for identifying and traversing these deserts? We sought to dialogue with Pierre Naville’s reflection in his book The Revolution and the Intellectuals, where he proposes the famous slogan “It is necessary to organize pessimism”.

En este artículo se propone la idea del desierto como una metáfora posible de lugares totalitarios donde las imágenes se presentan como obligatorio y preceptivo. Este ha sido un escenario muy presente en la actual situación política de nuestro país. ¿En qué medida el campo de los estudios utópicos y el psicoanálisis puede aportar herramientas críticas para identificar y atravesar por estos desiertos? Buscamos el diálogo con la refléxion de Pierre Naville en su libro La revolución y los intelectuales que propone el famoso lema “Hay que organizar el pesimismo”.

A melodia das coisas – diálogos possíveis entre Evgen Bavcar e Oscar Munoz / The melody of things – possible dialogues between Evgen Bavcar and Oscar Munoz

Este ensaio procura pensar as condições de possibilidade da construção de novas imagens, fazendo dialogar a obra do fotógrafo cego Evgen Bavcar e o do artista colombiano Oscar Munoz. O eixo principal do texto é discorrer sobre o estatuto da imagem pensado a partir dos pressupostos conceituais do discurso analítico. (AU)

This essay tries to think the conditions of possibility of building new images making a dialogue between the work of the blind photographer Evgen Bavcar and the colombian artist Oscar Munoz. The main pourpose of the text is to discuss the place of the image from the point of view of the conceptual assumptions of the psychoanalytic discourse. (AU)

Effect of cantilever length and alloy framework on the stress distribution in peri-implant area of cantilevered implant-supported fixed partial dentures.

Because many mechanical variables are present in the oral cavity, the proper load transfer between the prosthesis and the bone is important for treatment planning and for the longevity of the implant-supported fixed partial denture. Objectives To verify the stress generated on the peri-implant area of cantilevered implant-supported fixed partial dentures and the potential effects of such variable. Material and Methods A U-shaped polyurethane model simulating the mandibular bone containing two implants (Ø 3.75 mm) was used. Six groups were formed according to the alloy's framework (CoCr or PdAg) and the point of load application (5 mm, 10 mm and 15 mm of cantilever arm). A 300 N load was applied in pre-determined reference points. The tension generated on the mesial, lingual, distal and buccal sides of the peri-implant regions was assessed using strain gauges. Results Two-way ANOVA and Tukey statistical tests were applied showing significant differences (p<0.05) between the groups. Pearson correlation test (p<0.05) was applied showing positive correlations between the increase of the cantilever arm and the deformation of the peri-implant area. Conclusions This report demonstrated the CoCr alloy shows larger compression values compared to the PdAg alloy for the same distances of cantilever. The point of load application influences the deformation on the peri-implant area, increasing in accordance with the increase of the lever arm.

Effect of cantilever length and alloy framework on the stress distribution in peri-implant area of cantilevered implant-supported fixed partial dentures

ABSTRACT Because many mechanical variables are present in the oral cavity, the proper load transfer between the prosthesis and the bone is important for treatment planning and for the longevity of the implant-supported fixed partial denture. Objectives To verify the stress generated on the peri-implant area of cantilevered implant-supported fixed partial dentures and the potential effects of such variable. Material and Methods A U-shaped polyurethane model simulating the mandibular bone containing two implants (Ø 3.75 mm) was used. Six groups were formed according to the alloy’s framework (CoCr or PdAg) and the point of load application (5 mm, 10 mm and 15 mm of cantilever arm). A 300 N load was applied in pre-determined reference points. The tension generated on the mesial, lingual, distal and buccal sides of the peri-implant regions was assessed using strain gauges. Results Two-way ANOVA and Tukey statistical tests were applied showing significant differences (p<0.05) between the groups. Pearson correlation test (p<0.05) was applied showing positive correlations between the increase of the cantilever arm and the deformation of the peri-implant area. Conclusions This report demonstrated the CoCr alloy shows larger compression values compared to the PdAg alloy for the same distances of cantilever. The point of load application influences the deformation on the peri-implant area, increasing in accordance with the increase of the lever arm.