1000 resultados para Adesivos - Indústria


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Introduction: It is known that self-etching adhesive systems can act as semi-permeable membranes. Objective: Evaluate the effects of additional layer of hydrophobic resin on the microtensile bond strength of self-etching one-bottle adhesives. Material and method: Sixty bovine incisors were used in this study. The facial enamel surfaces of the crowns were abraded with silicon carbide paper to expose flat, mid-coronal dentin surfaces. The following adhesives were used: Clearfil Tri S Bond (CTSB), AdheSE One (ADH) and One Coat  7.0 (OC). Each material was tested with and without applying an additional layer of hydrophobic material from the same manufacturer. Z-350 composite resin was inserted in three 1 mm increments. All adhesive restorative procedure was performed under simulated pulpal pressure and the microtensile test was performed immediately after curing the composite resin. Data were submitted to ANOVA and Tukey test (p < 0.05). Result: For all adhesives tested, the worst results were observed in groups which the additional layer of hydrophobic resin was not applied. Conclusion: The application of additional layer of hydrophobic material can improve the adhesion of self-etching all-in-one adhesive systems.

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O presente trabalho busca trazer um olhar mais humano para a formação de jovens jogadores de futebol. A carreira é uma das mais almejadas pelas crianças em um país onde a educação primária ainda é deficitária. Soma-se isso à cultura enraizada na parte massiva da população de que estudar não é substancial. Deslumbrados pela fama e a importância dos jogadores profissionais, evidenciadas pela mídia esportiva e presentes na sociedade brasileira, estes garotos passam a buscar o mesmo para si, sem saber dos riscos e dificuldades que a carreira pode oferecer. Muitos deles esquecem-se da vida escolar e, caso não tenham sucesso na carreira profissional futebolística - o que acontece com a maioria, correm sérios riscos de ficarem marginalizados perante a sociedade. Este trabalho busca mostrar a visão de jovens que já estiveram envolvidos no universo das categorias de base do futebol e não prosseguiram no esporte, mas souberam priorizar os estudos e ter uma profissão alternativa. Mostra também depoimentos de profissionais que lidam com jovens que ainda alimentam esse sonho. Por último, traz notícias em geral do mundo do futebol de base

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Pós-graduação em Odontologia Restauradora - ICT

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Pós-graduação em Engenharia e Ciência de Alimentos - IBILCE

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Esse trabalho aborda a forma como os heróis são retratados atualmente no cinema pela indústria cultural e como se dá a divergência em relação aos heróis clássicos dos mitos gregos. O mito grego adotado como parâmetro para comparação e análise é o que narra a trajetória de Ulisses de volta para a ilha de Ítaca. O filme atual sobre o qual se desenvolve o estudo comparativo do herói no cinema é Capitão América - O Priemiro Vingador, adaptação dos quadrinhos da Marvel para o cinema em 2011, pelo diretor Joe Johnston. O mito surge nos começos de toda civilização, sendo visto como uma história sagrada, da qual tomaram parte os deuses ou seres sobrenaturais que participaram desses acontecimentos. O mito surge nos começos de toda civilização, sendo visto como uma história sagrada, da qual tomaram parte os deuses ou seres sobrenaturais que participaram desses acontecimentos

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Recent bonding systems have been advocated as multi-purpose bonding agents. The aim of this study was to determine if some of these bonding systems could be associated to composite resins from different manufacturers. This investigation was conducted to test lhe shear bond strength of three bonding systems: Scotchbond Multi-Purpose (3M Dental Products), Optibond Light Cure (Kerr) and Optibond Dual Cure (Kerr), when each of them was associated to lhe composite resins: Z1 00 (3M Dental Products), Prisma - APH (Dentsply) and Herculite XRV (Kerr). Seventy-two flat dentin bonding sites were prepared to 600 grit on human premolars mounted using acrilic resins. The teeth were assigned at random to 9 groups of 8 samples each. A split die with a 3mm diameter was placed over lhe surface of lhe dentin treated with one of lhe adhesive systems, and lhe selected composite resin was inserted and light cured. The split mold was removed and all samples were termocycled and stored in 37ºC water for 24 hours before testing. Shear bond strength was determined using an lnstron Universal testing machine. Some failures were examined under lhe S.E.M. Data was analysed by one-way analysis of variance, that demonstrated a significant difference (p<0,05) in the mean shear bond strength among Optibond Light Cure (15,446 MPa), Scotchbond Multi-Purpose (13,339 MPa) and Optibond Dual Cure (10,019 MPa). These values did not depend on the composite resin used. The association between bonding system/composite resin was statistycally significant (p<0,05) and the best results were obtained when the composite resins Z100 and Herculite were used with the adhesive system Optibond Light Cure, and when the composite resin APH was used with the adhesive system Scotchbond Multi-Purpose

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The biocompatibility of two dentin adhesives (Scotchbond MultiPurpose- 3M and Optibond Multi-Use - Kerr) was evaluated in rats subcutaneous connective tissue implants. Polyethylene tubes filled with the adhesives were surgically implanted into the dorsal subcutaneous tissues of rats. The tubes were left implanted for periods of 14, 30, 60 and 84 days, following wich the animais were killed and the implants, together with the surrounding tissue, were excised. The specimens were then fixed in 10 per cent formalin, sectioned serially and stained with hematoxylin and eosin and then, examined by light microscopy. After 14 and 30 days the tubes were surrounded by a mild to moderate inflammatory infiltration. After 60 and 84 days microscopic examination revealed the formation of a connective tissue capsule around each tube. The microscopic examination of the biopsy specimens allowed to conclude that: a) both dentin adhesives are considered biologically acceptable when placed in contact with rats subcutaneous connective tissue; b) in the observation period of 30 days there were moderate tissue reaction to the Optibond Multi-Use -light cure- (Kerr); c) after 60 and 84 days the use of both dentine adhesives did not interfere in the healing of the surrounding connective tissue

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)