The present study assesses the shear strength of Polyether Ether Ketone (PEEK) and Zantex to thermopolymerizable acrylic resin (TAR) with different surface treatments. To this end, 100 test specimens were produced and divided into two groups: G1(PEEK + TAR) and G2 (Zantex + TAR). Each group was subdivided into the subgroups A, B, C, D and E (n=10) according to surface pre-treatment: A: TAR + PEEK/Zantex without surface treatment (control); B: TAR + PEEK/Zantex treated with Palabond; C: TAR + PEEK/Zantex blasted with aluminum oxide (Al2O3) of 125 µm; D: TAR + PEEK /Zantex treated with Al2O3 of 125 µm + Palabond; and E: TAR + PEEK/Zantex prepared with groove-shaped retentions. The structures were tested in a Universal testing machine EMIC DL2000. Two-way variance analysis showed significant difference between materials and surface treatments (p < 0.001). Multiple comparisons were done with Tukey’s test and failure modes were analyzed with the G test. Statistical analysis showed that Zantex outperformed PEEK for most treatments and showed similar performance in the subgroups treated with Al2O3. Within the PEEK group, the use of grooves and Palabond combined with blasting showed the best results; in the Zantex group, the best results were obtained with Palabond and Palabond combined with blasting. Regarding failure modes, PEEK showed only adhesive failures and Zantex’s failures were dependent on treatment. Therefore, the surface treatment method applied to the polymers studied here contribute to the material’s adhesion to acrylic resin.
A organização mundial da saúde (OMS) e os governos de todo o mundo enfrentam hoje uma grave crise, a pandemia pelo novo Coronavírus. Para o enfrentamento à Covid-19, a grande extensão territorial do Brasil, com a variedade de costumes e hábitos dos indivíduos, juntamente com a diversificação das assistências à saúde compatíveis com cada localidade, representam um desafio para as autoridades na questão de planejamento de ações. No combate à Covid-19, a abordagem regionalizada tem sido o foco de ação de muitos governos em todo o mundo, sendo que no Brasil a estrutura do SUS apresenta-se como um fator facilitador no enfrentamento ao novo Coronavírus, através da estratégia de saúde da família (ESF) e suas ações voltadas para a comunidade. Para que essa estratégia seja efetiva a atitude de cada pessoa se torna importante, além da dedicação da gestão e dos agentes de saúde na prestação da assistência. Portanto, o presente estudo teve como objetivo avaliar a pandemia da Covid-19 no contexto de vida dos usuários das UBSs do munícipio de Cláudio-Minas Gerais, analisando o interesse do usuário acerca da pandemia e o comportamento da população dependente desse sistema frente ao atual problema. Objetivou-se também identificar se existem diferenças importantes nos posicionamentos dos moradores das zonas rural e urbana.
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