“Coisa de menina” e “coisa de menino”? Uma leitura do preconceito de gênero pela perspectiva dos praticantes de balé clássico masculino e futebol feminino

Um reflexo do machismo estrutural na sociedade é a criação de estereótipos de gênero, que determinam o que é aceitável para homens ou mulheres, estigmatizando certas práticas corporais. Este artigo buscou evidenciar os preconceitos sofridos por dois grupos – mulheres no futebol e homens no balé clássico – a partir de suas próprias percepções, através de um questionário com perguntas abertas e fechadas. A análise dos dados fez uso das categorias sociológicas apresentadas por Marchi Júnior, Almeida e Souza (2019), para explicar os fenômenos sociais e qualificar uma leitura preliminar do tema

Comparison of two instrumentation techniques in the preparation of simulated curved root canals

O tratamento endodôntico requer modelagem eficaz para que a desinfecção dos canais seja otimizada. Esta deve ser realizada de maneira conservadora para respeitar a integridade estrutural do dente e preservar a dentina radicular saudável, determinando então o prognóstico à longo prazo. Um grande desafio para realizar a modelagem ideal é a presença de curvaturas no canal. Propondo-se comparar a modelagem de dois sistemas mecanizados, Easy ProDesign Logic (Easy Equip. Odontológicos, Belo Horizonte, Brasil) e TruNatomy (Dentsply Sirona Endodontics Ballaigues, Suiça), em canais curvos, 20 canais simulados (IM do Brasil - Tecnologia e Inovação para Odontologia, São Paulo, Brasil) foram instrumentados por um único operador. As imagens pré e pós-instrumentação foram sobrepostas e analisadas com auxílio do programa Adobe Photoshop 2021 (Adobe Systems, San Jose, CA), obtendo-se os valores de centricidade nas alturas de 1 à 9mm do canal simulado. Os dados foram analisados estatisticamente utilizando o software Bioestat 5.0 (Instituto de Desenvolvimento Sustentável Mamirauá, Belém, PA, Brasil). A relação de centricidade de preparo, nos grupos TruNatomy e Logic, foi comparada através do teste Krukal-Wallis. De acordo com os resultados observados, não foram encontradas diferenças estatisticamente significantes entre os dois sistemas em nenhuma das alturas avaliadas (p<0.05). Quanto à qualidade do preparo, os dois sistemas mostraram-se eficientes em preservar a anatomia original do canal, realizando preparos com boa centralização em todas as alturas avaliadas.The endodontic treatment requires effective shaping to optimize root canal disinfection. The shaping must be conservative to preserve healthy root dentin for the long-term prognosis of teeth. A challenge to perform an ideal shaping is the presence of curvatures in the canal. Proposing to evaluate 2 file systems shaping ability, Easy ProDesign Logic (Easy Equip. Odontológicos, Belo Horizonte, Brasil) e TruNatomy (Dentsply Sirona Endodontics Ballaigues, Switzerland), in the preparation of curved root canals, 20 simulated root canals (IM do Brasil - Tecnologia e Inovação para Odontologia, São Paulo, Brasil) were instrumented by only one operator. After instrumentation, the shape ability produced was evaluated by centering ratios criteria. The pre and post-preparation images were superimposed and analyzed with the aid of the Adobe Photoshop 2021 program (Adobe Systems, San Jose, CA), centering values were obtained at the length of 1 to 9mm of simulated root canal. The data were statistically analyzed using the Bioestat 5.0 software (Instituto de Desenvolvimento Sustentável Mamirauá, Belém, PA, Brasil). The centering ratios of the groups TruNatomy e Logic were compared with Krukal-Wallis test. According to the observed results, statistically differences were not found between the two file systems at any evaluated lengths (p<0.05). As for shaping ability, the two file systems shown efficiency in preserv the original root canal anatomy, promoting great centering ratios in all evaluated length

Surface degradation of composite resins under staining and brushing challenges

Background/purpose: The primeval evaluation of the properties of composite resins with different compositions that impact clinical behavior is very important in guiding use in clinical settings. The aim of this study was to evaluate color stability (ΔE) and Knoop microhardness (KHN) of composite resins containing different compositions. Materials and methods: Forty-five disks were made composite resins: Filtek Z350 XT/3MESPE and Beautifill II/SHOFU and divided into 3 subgroups: Control - immersed in artificial saliva; OB – brushing with Oral B 3D White; CT - brushing with Colgate Total 12. The OB and CT groups had the disks brushed daily with 120 cycles after immersion in coffee solution (10 min) for a period of 30 days. ΔE and KHN was obtained at baseline and after the treatments. Data were analyzed ANOVA and Tukey tests (p < 0.05). Results: ANOVA revealed significant differences for ΔE and KHN. ΔE: the highest mean was observed in Beautifil II composite resin group, which differed significantly from Z350 group. For the Beautifil II, the treatments were significantly different from each other. For the Z350, the control group showed significant differences in relation to OB e CT groups. KHN: the highest mean was observed in Z350 group, which differed significantly from Beautifil II group. For Z350, the control group showed significant differences in relation to OB e CT groups. For Beautifil II, the treatments did not differ significantly among themselves. Conclusion: The composite resin containing fluoride in the composition showed higher color alteration (ΔE) and lower Knoop microhardness (KHN), thus demonstrating that composition is an important factor in the clinical performance of esthetic restorative materials. Keywords: Color, Composite resins, Hardness, Toothpaste