Abstract This study evaluated physicochemical properties of experimental infiltrants after addition of hydroxyapatite nanoparticles (HAp) or 58S bioactive glass (BAG) and diphenyliodonium hexafluorophosphate (DPI). The resin matrix was composed of TEGDMA/Bis-EMA (3:1), 0.5 mol% CQ, and 1 mol% EDAB. The blends received or not 0.5 mol% DPI and 10% wt BAG or HAp. Icon was used as commercial control. The groups were characterized by XRD, FT-IR spectrometry, and SEM before and after simulated body fluid (SBF) immersion for up to 7 days. Polymerization kinetics (n =3 ), water sorption and solubility (n=10), and viscosity (n = 3) were surveyed. For polymerization kinetics, the samples were polymerized for 5 min and the data were obtained from 40 s and 5 min. Statistical analysis was made using ANOVA and Tukey's test (a = 0.05). After 7 days of SBF immersion, XRD and FT-IR showed that the HAp crystalline phase was present only in the HAp groups. A lower degree of conversion (DC) and polymerization rate were observed for the Icon and BAG groups, whereas HAp showed higher values. For the BAG group, DPI increased polymerization rate and DC in 40 s. After 5 min, all groups presented DC above 80%. In groups with particles, the HAp groups exhibited higher viscosity, whereas DPI groups showed a decrease in viscosity. Icon had the highest water sorption. To conclude, BAG neither improved the physicochemical properties studied, nor did it show bioactive properties. The addition of DPI reduced viscosity caused by particle addition and also attenuated the DC decrease caused by BAG addition. The addition of bioactive particles to infiltrants should be seen with caution because they increase viscosity and may not bring major clinical improvements that justify their use. DPI might be indicated only if any component is added to the infiltrant to act as a compensation mechanism.

Resumo Este trabalho investiga como o filme I am Mother (2019), dirigido por Grant Sputore, traz para o centro da narrativa a relação entre mãe e filha e faz convergir na primeira as figuras da mãe nutridora e da mãe destruidora, ora uma mãe-máquina, ora um corpo-monstruoso, na tentativa de criar um ser humano perfeito. Logo, buscaremos analisar, com recurso à poética gótica, as relações entre as personagens femininas que em momentos diferentes ocupam o lugar central do ser mãe, assim como também questionaremos o processo de construção de identidade feminina em um futuro pós-humano. Para atingir tais objetivos, foram utilizados como referencial teórico, sob a lente do gótico contemporâneo, conceitos de monstruosidade, de mãe nutridora/destruidora e de abjeção.

Abstract This paper investigates how the movie I am Mother (2019), by Grant Sputore, brings into the center of the narrative the relationship between mother and daughter and converges the concepts of the nourishing mother and destructive mother, either a machine-mother or a monstrous body, in the attempt of creating a perfect human being. Thus, we will analyse, using the Gothic Poetics, the relationships between the female characters whom, in different moments, occupy the central space of being mother, as well as ponder on the process of the female identity development in a post-human future. In order to reach this objective, some theoretical references are used, under the lens of a contemporary gothic, concepts such as monstrosity, nourishing/destructive mother and abjection.

Abstract The composition of infiltrants can influence their physical properties, viscosity and depth of penetration (DP). Strategies are used to increase the DP, such as the addition of diluents or the use of heat. This study aimed to evaluate the effect of preheating and composition on physical properties and DP of infiltrants in demineralized enamel. The groups were assigned, and the following experimental formulations were made: 25%BisEMA +75%TEGDMA; 25%BisEMA +65%TEGDMA +10%ethanol; 25%BisEMA +65%TEGDMA +10%HEMA; 100%TEGDMA; 90%TEGDMA +10%ethanol; 90%TEGDMA +10%HEMA. The samples were photoactivated at two temperatures (25°C and 55°C). Degree of conversion (DC) was performed using an infrared spectrophotometer. Elastic modulus (E), flexural strength (FS) and contact angle (CA) tests were also performed. The DP of an infiltrant in demineralized enamel was determined by confocal laser scanning microscopy (CLSM) using an indirect labeling technique. The data were analyzed by two-way ANOVA and Tukey’s test. DC increased after preheating in all the groups; however, 90%TEGDMA+10%ethanol showed the lowest DC for both temperatures, and the lowest E. Preheating did not influence E or FS. The CA increased at 55°C for most groups, but decreased for groups containing HEMA. Temperature did not seem to influence DP, and Icon showed the lowest DP values. The 100%TEGDMA composition showed more homogeneous penetration, whereas Icon showed heterogeneous and superficial penetration. The preheating technique does not improve all properties in all the material compositions. The composition of a material can influence and improve its properties.

Abstract Introduction Composite resins are subject to challenges in the oral cavity that are related to patients' habits, which can compromise the restorations’ integrity and longevity. Therefore, it is necessary to study how consuming beverages and smoking cigarettes affects professional prophylaxis. Objective The aim of this study was to evaluate how the sodium bicarbonate air-polishing affects the mass change (sorption and solubility) of a composite resin exposed to cigarette smoke, red wine, or coffee solution. Material and method Eighty composite resin samples (FiltekZ350 XT - 3M/ESPE) were prepared and distributed into 8 groups (n=10): G1 (air-polishing + distilled water), G2 (air-polishing + coffee), G3 (air-polishing + red wine), G4 (air-polishing + cigarette smoke), G5 (distilled water), G6 (coffee), G7 (red wine), or G8 (cigarette smoke). The composite resin samples were weighed in triplicate to obtain M1 (initial mass), M2 (mass after 30 days of storage in the tested solutions), and M3 (after desiccation) values. The sorption and solubility values were calculated and analyzed using 2-way ANOVA and Tukey’s test (5%). Result The experimental groups had higher sorption and solubility values than the control groups, regardless of whether air-polishing was used. There was no statistically significant difference in the sorption between the air-polished and non-air-polished groups; however, the solubility was higher in the air-polished groups. Conclusion Air-polishing using sodium bicarbonate powder was able to intensify the solubility process of the tested resins but did not significantly increase the sorption values.

Resumo Introdução As resinas compostas estão sujeitas à desafios na cavidade oral relacionados aos hábitos dos pacientes, que podem comprometer a integridade e longevidade das restaurações. As consequências da associação do consumo de bebidas e o uso de cigarros à profilaxia profissional precisam ser estudadas. Objetivo O objetivo desse estudo foi avaliar como o jateamento com bicarbonato de sódio afeta a mudança de massa (sorção e solubilidade) de uma resina composta exposta à fumaça de cigarro, vinho tinto e café. Material e método Oitenta corpos-de-prova de resina composta (FiltekZ350 XT - 3M/ESPE) foram preparados e distribuídos em 8 grupos (n=10): G1 (jateamento + água destilada), G2 (jateamento + café), G3 (jateamento + vinho tinto), G4 (jateamento + fumaça de cigarro), G5 (água destilada), G6 (café), G7 (vinho tinto) e G8 (fumaça de cigarro). Os corpos-de-prova de resina composta foram pesados em três tempos diferentes para obter M1 (massa inicial), M2 (massa após 30 dias de armazenamento nas soluções testadas e exposição ao agente) e M3 (após dessecação). Os valores de sorção e solubilidade foram calculados e analisados usando ANOVA 2-fatores e teste Tukey (5%). Resultado Os grupos experimentais tiveram maior sorção e solubilidade comparado ao grupo controle, independentemente do uso do jateamento. Não houve diferença estatística na sorção para o fator jateamento. Porém, a solubilidade foi maior nos grupos jateados. Conclusão: O jateamento com bicarbonato de sódio foi capaz de intensificar a solubilidade da resina testada, embora não tenha aumentado significativamente os valores de sorção.

Objective to report the experience of rural families when having a father/husband with prostate cancer illness. Methods qualitative research, conducted at the residence of four rural families with nine subjects. A semi-structured interview was used, and thematic categories were established by the data analysis. Results men with cancer were between 66 and 68 years old, knowing the diagnosis at least four years ago. Respondents family members were wives or children, aged between 30 and 69 years old. Families worked on agriculture and livestock. The nominated category A prostate cancer in our life is formed by the sub-categories: discovery of the diagnosis; family support; changes resulting from illness and difficulties faced during treatment. Conclusion the rural family experience is full of constant division of tasks between the care for the father/husband and work activities, changes in marital life, sadness, distress and hopes about an uncertain future.

Objetivo relatar la experiencia de la familia rural al tener padre/cónyuge delante de la enfermedad por cáncer de próstata. Métodos investigación cualitativa, en la residencia de cuatro familias rurales con nueve sujetos. Se utilizaron entrevista semiestructurada y análisis de datos, categorías temáticas se establecieron. Resultados hombres con cáncer entre 66 y 68 años, con conocimiento del diagnóstico hasta en el máximo cuatro años. Encuestados familiares eran mujeres o hijos, entre 30 y 69 años. Las familias se dedicaban a la agricultura y ganadería. La categoría A neoplasia de próstata en nuestra vida está formada por las subcategorías: descubrimiento del diagnóstico; apoyo familiar; cambios resultantes de la enfermedad; y dificultades enfrentadas durante el tratamiento. Conclusión la experiencia de la familia rural está permeada por la constante división de tareas entre los cuidados al padre/cónyuge y actividades laborales, cambios en la vida conyugal, dolores, angustias y esperanzas sobre un futuro incierto.

Objetivo relatar a experiência da família rural ao ter o pai/esposo frente ao adoecimento por câncer de próstata. Métodos pesquisa qualitativa, realizada na residência de quatro famílias rurais com nove sujeitos. Utilizou-se a entrevista semiestruturada, e pela análise dos dados, foram estabelecidas categorias temáticas. Resultados os homens com câncer tinham idades entre 66 e 68 anos, conheciam o diagnóstico no máximo há quatro anos. Os familiares respondentes foram esposas ou filhos, com idades entre 30 e 69 anos. As famílias se dedicavam à agricultura e pecuária. A categoria nominada A neoplasia de próstata na nossa vida é formada pelas subcategorias: descoberta do diagnóstico; apoio familiar; mudanças decorrentes do adoecimento e dificuldades enfrentadas durante o tratamento. Conclusão a experiência da família rural é permeada pela constante divisão de tarefas entre os cuidados ao pai/esposo e as atividades laborais, mudanças na vida conjugal, tristezas, angústias e esperanças sobre um futuro incerto.

O objetivo deste trabalho foi caracterizar o óleo-resina da copaíba (Copaifera reticulata) e estimar, por meio de marcadores microssatélites, a variabilidade genética da espécie na Floresta Nacional do Tapajós, PA. A amostragem foi realizada em duas áreas, distanciadas de 5 km, em 136 árvores. A diversidade genética foi avaliada com seis marcadores microssatélites derivados de C. langsdorffii, e o óleo obtido de 30 árvores (15 de cada área) foi caracterizado em termos físicos e químicos. O óleo C. reticulata apresenta aspecto líquido, fino, odor fraco e de coloração amarelo-dourada (73,3% das plantas), com viscosidade muito variável (18 a 187 Pa-s) e densidade média de 0,975±0,049 g cm-3. O índice de acidez variou de 9,62 a 10,17 mg g-1 de KOH e o de saponificação de 100,63 a 109,84 mg g-1. A análise molecular identificou 78 alelos, com média de 13 por loco. A heterozigosidade esperada variou 0,59 a 0,85 (média de 0,75), com nível de endogamia de 0,375 a 0,419. Houve pouca diferenciação genética entre as populações das diferentes áreas de coleta (F ST = 0,030), mas a variabilidade foi maior entre os grupos genéticos detectados pelo programa Structure (F ST = 0,070). Essa maior variabilidade indica que não há ameaças à conservação genética da copaíba, em médio prazo.

The objective of this work was to characterize the oleoresin of copaiba (Copaifera reticulata) and to estimate genetic variability of the species in the Tapajós National Forest, PA, Brazil, using microsatellite markers. Sampling was performed in two areas, 5 km apart, in 136 trees. Genetic diversity was evaluated with six microsatellite markers derived from C. langsdorffii, and the oleoresin obtained from 30 trees (15 from each area) was physically and chemically characterized. Oleoresin from C. reticulate has a liquid, thin aspect, with a weak odor and yellowish-gilded color (73.3% of the plants), highly variable viscosity (18 to 187 Pa-s), and mean density of 0,975±0,049 g cm-3. Its acidity index varied from 9.62 to 10.17 mg g-1 of KOH and the saponification index from 100.63 to 109.84 mg g-1. The molecular analysis identified 78 alleles, with an average of 13 per locus. The expected heterozygosity varied from 0.59 to 0.85 (mean of 0.75) and the inbreeding level, from 0.375 to 0.419. The genetic differentiation between populations in the different sampling areas was low (F ST = 0.030), but the variability was higher between the genetic groups detected by Structure software (F ST = 0.070). This higher variability indicates that the genetic diversity of copaiba is not threatened in the mid-term.