Glassfiber
Mostrando 13-24 de 30 artigos, teses e dissertações.
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13. Adhesion strategy and early bond strengths of glass-fiber posts luted into root canals
This study investigated the effect of coinitiator solutions and self-adhesive resin cement on the early retention of glass-fiber posts. Cylindrical glass-fiber posts were luted into 40 incisor roots with different adhesion strategies (n = 10): SB2, Single Bond 2 + conventional resin cement (RelyX ARC); AP, Scotchbond Multipurpose Plus (SBMP) activator + prim
Braz. oral res.. Publicado em: 14/08/2012
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14. Considerações sobre o preparo de amostras contendo micropoluentes estrogênicos
In this work, the materials used in the recovery of estrogens from aqueous matrices by filtration and solid phase extraction were evaluated. The results showed that glass-fiber filters allow a recovery and repeatability compatible with this type of analysis, whereas cellulose esters lead to significant losses of the analytes, mainly due to adsorption process
Química Nova. Publicado em: 2012
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15. Conventional dual-cure versus self-adhesive resin cements in dentin bond integrity
During post preparation, the root canal is exposed to the oral cavity, and endodontic treatment may fail because of coronal leakage, bacterial infection and sealing inability of the luting cement. OBJECTIVE: this study quantified the interfacial continuity produced with conventional dual-cure and self-adhesive resin cements in the cervical (C), medium (M) an
J. Appl. Oral Sci.. Publicado em: 24/06/2011
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16. Effect of cavity preparation on the flexural strengths of acrylic resin repairs
OBJECTIVE: To investigate the effect of cavity preparation on the flexural strength of heat-curing denture resin when repaired with an auto-curing resin. MATERIAL AND METHODS: Ninety-six rectangular specimens (64x10x2.5 mm) prepared from heat-curing denture base resin (Meliodent) were randomly divided into four groups before repair. One group was left intact
Journal of Applied Oral Science. Publicado em: 2010-12
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17. Influência dos cimentos endodônticos e agentes de cimentação na resistência à união de pinos de fibra de vidro
A restauração de dentes tratados endodonticamente apresenta diversos aspectos importantes a serem analisados. Um desses, e talvez um dos mais estudados, é a possível interação entre os cimentos endodônticos e os agentes cimentantes de pinos intra-radiculares pré-fabricados ou não, que são amplamente utilizados para este tipo de restauração. Essa
Publicado em: 2009
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18. In vitro evaluation of the resistance to traction of different fiber-glass posts used in two protocols for fragile root rehabilitation, with or without composite resin reinforcement / Avaliação, in vitro, da resistência à tração de diferentes pinos de fibra de vidro utilizados em dois protocolos para reabilitação de raízes fragilizadas, com e sem reforço de resina composta
This study evaluated in vitro the resistance of roots to traction of different posts of glass-fiber used in two register to rehabilitation of weakened roots with or out reinforcement of composite resin. Thirty canines had their crowns sectioned and radicular canals endodontically treated. The roots were included in blocks of resin, having exception in 2mm ce
Publicado em: 2008
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19. Avaliação da resistência à fratura de raízes portadoras de pinos metálicos fundidos e de fibra de vidro cilíndricos e cônicos / Evaluation of the resistance to fracture of roots with cast metallic posts and cylindrical and conical fiber-glass posts
This study evaluated in vitro the fracture resistance of roots with metallic and glass-fiber intraradicular retainers, varying the geometric configuration and using the compression test. The sample had 50 central superior incisives: 10 received only the coronary preparation (control) and 40 had their crowns sectioned and radicular canals endodontically treat
Publicado em: 2007
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20. Evaluation of the resistance to fracture of roots with cast metallic posts and fiber-glass posts at different working lengths, using the compression test / Avaliação da resistência à fratura de raízes portadoras de pinos metálicos fundidos e de fibra-de-vidro com diferentes comprimentos, por meio do teste de compressão
In this study, it was evaluated, in vitro, the resistance of fracture roots with glass-fiber and metallic intraradicular retainers with different lengths, using the compression test. Sixty caries-free superior canines had their crowns sectioned and radicular canals endodontically treated. The roots were embedded in acrylic resin, except for the 4 mm of cervi
Publicado em: 2007
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21. Study of alternatives to use de glass fibers without alkali-resistant characteristics in the cement composite products for civil construction / Estudo das alternativas de uso da fibra de vidro sem características álcali resistente em elementos construtivos de cimento Portland
As fibras de vidro são usadas há alguns anos com a finalidade de melhorar a resistência à tração e ao impacto de compósitos cimentícios. Mas, os álcalis do cimento Portland atacam essas fibras causando a degradação de suas propriedades mecânicas. Para contornar essa degradação, há alguns anos, foram desenvolvidas as fibras álcalis-resistente
Publicado em: 2007
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22. Exposição aguda ao material particulado total em suspensão proveniente de diferentes fontes e suas repercussões nas respostas inflamatórias, sistêmica e local, em ratos / Acute exposure to total suspended particles from different sources and their impacts on both systemic and local inflammatory responses in rats
Background: Air pollution is associated with both increased morbidity and mortality. These associations persist even at lower concentrations and shortterm exposure. Objectives: To assess the impact of the components of three different sources of Total Suspended Particles (TSP) on local and systemic inflammatory responses in healthy rats. Methods: TSP from au
Publicado em: 2007
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23. A comparison of the retention capability among three different glass-fiber filters used for chlorophyll-a determinations
Brazilian Journal of Oceanography. Publicado em: 2004-12
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24. Alterations in the phenotype of plant cells studied by NH2-terminal amino acid-sequence analysis of proteins electroblotted from two-dimensional gel-separated total extracts
Phenotypic alterations induced by the cytokinin 6-benzylaminopurine in cell suspensions of Nicotiana plumbaginifolia were studied at the level of the NH2-terminal sequence of the constituent proteins. Total protein extracts were separated by classical two-dimensional PAGE, and the proteins were recovered by electroblotting onto support materials allowing dir