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Mostrando 1-12 de 28 artigos, teses e dissertações.
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1. Colorimetric analysis of dental porcelains: effects of the background color
Abstract This study evaluated how the background (white or gray) affects the color parameter measurements and color difference calculations (∆Eab and ∆E00) of dental ceramics. Disc-shaped feldspathic ceramic specimens were prepared with two shades (enamel and dentin) and stained in red wine (7-day immersion). A spectrophotometer was used to perform color
Cerâmica. Publicado em: 2022
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2. Inorganic filler content of resin-based luting agents and the color of ceramic veneers
Abstract The influence of inorganic filler content of resin-based luting agents (RBLAs) on color change (ΔE00), CIEL*a*b* (individual color coordinates), and translucency parameters (TP) of simulated ceramic laminate veneer (CLV) was investigated. RBLAs with low, intermediate, and high inorganic filler content (55%, 65%, and 75% mass fractions, respectively
Braz. oral res.. Publicado em: 07/06/2018
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3. Caracterização de materiais cerâmicos à base de CuCr 2 O 4 preparados pelo método da reação de combustão em solução para uso como pigmentos
Resumo Pós cerâmicos à base de CuCr2O4 foram preparados pelo método da reação de combustão em solução a partir da calcinação no intervalo de 500 a 1100 °C, tendo por finalidade a aplicação destes como pigmento cerâmico. O estudo das propriedades estruturais, morfológicas, químicas e ópticas foi realizado por meio das técnicas de difração
Cerâmica. Publicado em: 2018-03
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4. Influence of Photoinitiator on Accelerated Artificial Aging and Bond Strength of Experimental Resin Cements
Resumo O objetivo deste estudo foi avaliar in vitro o efeito do fotoiniciador fenilpropanodiona (PPD), isoladamente ou em associação com a CQ, sobre a estabilidade de cor de cimentos resinosos fotoativados e sua resistência de união adesiva à cerâmica, por teste de microcisalhamento. Foram utilizados 4 cimentos resinosos, sendo um comercial (RelyX Vene
Braz. Dent. J.. Publicado em: 2018-02
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5. Influence of Different Concentration and Ratio of a Photoinitiator System on the Properties of Experimental Resin Composites
Resumo O objetivo foi avaliar a influência da concentração e proporção de canforoquinona (CQ)/amina terciária (DABE) na resistência à flexão (RF), módulo flexural (MF), grau de conversão (GC), amarelamento (AM), sorpção (SA) e solubilidade em água (SL) de compósitos experimentais. Blendas acrilatas foram preparadas com diferentes concentraçõ
Braz. Dent. J.. Publicado em: 2017-12
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6. Translucency and color stability of resin composite and dental adhesives as modeling liquids – A one-year evaluation
Abstract The aim of this study is to evaluate the influence of modeling liquids on the translucency and color shade of resin composites (RCs) after one year of storage. RC specimens were prepared using either a conventional insertion technique (control; without modeling liquid) or a restorative dental modeling insertion technique (RDMIT) with dental adhesive
Braz. oral res.. Publicado em: 03/07/2017
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7. Effects of modeling liquid/resin and polishing on the color change of resin composite
Abstract Modeling liquids/resins have been used to build up resin composite (RC) restorations, although there is a lack of information regarding their effects on the color stability of the latter. Therefore, the purpose of the present study was to evaluate the effects of the presence of modeling liquid between layers of RC and the finishing/polishing state o
Braz. oral res.. Publicado em: 18/08/2016
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8. Influence of resin cement shade on the color and translucency of ceramic veneers
ABSTRACT Objective This in vitro study evaluated the effect of two different shades of resin cement (RC- A1 and A3) layer on color change, translucency parameter (TP), and chroma of low (LT) and high (HT) translucent reinforced lithium disilicate ceramic laminates. Material and Methods One dual-cured RC (Variolink II, A1- and A3-shade, Ivoclar Vivadent)
J. Appl. Oral Sci.. Publicado em: 2016-08
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9. Spectroscopic Properties of pigment Li2-xZn1-xPrxTi3O8
Inorganic compounds doped with rare earths (Ce3+, Pr3+, Nd3+, Sm3+, Eu 3+, Gd 3+, Tb 3+, Tm3+) have been used in various applications including light-emitting devices such as fluorescent lamps, cathode ray tubes, lasers and inorganic pigments. In this study, Pr3+ is doped in spinel Li2ZnTi3O8 system and synthesized by the polymeric precursor method, which is
Mat. Res.. Publicado em: 14/06/2016
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10. Colour responses of two fast-growing hardwoods to two-step steam-heat treatments
Colour changes by thermal treatments are a good alternative to increase wood quality, especially for non-structural uses. In this study, rose gum (Eucalyptus grandis) and Sydney blue gum (Eucalyptus saligna) woods from Southern Brazil were thermally treated under different conditions (steam pre-treatment in an autoclave at 127 °C for 1 hour and heat treatme
Mat. Res.. Publicado em: 18/03/2014
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11. In vitro evaluation of the whitening effect of mouth rinses containing hydrogen peroxide
The aim of this study was to evaluate the bleaching effect of two mouth rinses containing hydrogen peroxide. Thirty premolars were randomly divided into two groups (n = 15): Listerine Whitening (LW) and Colgate Plax Whitening (PW). The teeth were fixed on a wax plate and with acrylic resin, at a distance of 5 mm between each other, exposing the buccal surfac
Brazilian Oral Research. Publicado em: 2012-06
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12. Análise da estabilidade de cor e rugosidade de superfície de compósitos submetidos à fumaça de cigarro / Color stability and surface roughness of dental composites exposed to cigarette smoke
O objetivo deste estudo foi avaliar a estabilidade de cor e rugosidade de superfície de 3 compósitos odontológicos com partículas diferentes: nanohíbrido (Tetric N-Ceram - Ivoclar Vivadent), híbrido (Z250 - 3M ESPE) e microhíbrido com matriz silorano (Filtek P90 3M - ESPE), submetidos à fumaça de cigarro. Para isso, foram obtidos 60 corpos-de-prova
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/11/2011