Etching
Mostrando 25-36 de 424 artigos, teses e dissertações.
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25. Influence of ethanol-wet dentin, adhesive mode of application, and aging on bond strength of universal adhesive
Abstract The aim of this study was to evaluate the effect of ethanol on the bond longevity of a universal adhesive system to bovine dentin, under different modes of adhesive application and artificial aging. Bovine dentin was exposed, and the smear layer was standardized by sandpaper polishing. Specimens were randomly divided into 2 groups: ethanol (E) and n
Braz. oral res.. Publicado em: 11/10/2018
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26. Long-term bonding efficacy of adhesives containing benzodioxioles as alternative co-initiators
Abstract This study evaluated the three-year lifespan of the bond to dentin of experimental self-etch adhesives containing benzodioxole derivatives – 1,3-benzodioxole (BDO) and piperonyl alcohol (PA) – as co-initiator alternative to amines. Adhesive resins were formulated using Bis-GMA, TEGDMA, HEMA, camphorquinone and different co-initiators: BDO, PA or
Braz. oral res.. Publicado em: 11/10/2018
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27. Caracterización del proceso de fabricación de macroporos sobre sustrato de silicio por método electroquímico
ABSTRACT In the present work, the fabrication process of a set of micropores on crystalline silicon wafers manufactured through wet etching technique was studied. The influence of different control factors such as voltage, temperature and braking agent on the specific characteristics of formation was evaluated. An exhaustive analysis of the evolution of elec
Matéria (Rio J.). Publicado em: 19/07/2018
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28. Propiedades físicas y cristalinas del Cd1-xZnxTe (0 ≤ x ≤ 1)
ABSTRACT Cd1-xZnxTe (0 ≤ x ≤ 1) and ZnTe are II-VI semiconductors, which are used in single crystalline structure to improve their crystalline and electrical properties. The CZT and ZnTe must possess high crystalline and electrical quality to be used, the first in x or γ-ray detectors, and as substrates for suitable epitaxial films for detecting IR radi
Matéria (Rio J.). Publicado em: 19/07/2018
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29. Silicon Nanostructuring Using SF6/O2 Downstram Plasma Etching: Morphological, Optical and Sensing Properties
Silicon (Si) nanostructures were prepared in the downstream of radiofrequency SF6/O2 mixture plasma generated in 13.56 MHz hollow cathode discharge system. Depending on the oxygen percentage in the mixture, the obtained Si nanostructures were characterized for their different properties: etching rate, morphology, optical reflectance, photoluminescence, spect
Mat. Res.. Publicado em: 10/07/2018
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30. Annealing and Extended Etching Improve a Torsional Resonator for Thin Film Internal Friction Measurements
We evaluate two methods to improve the background internal friction of the Double Paddle Oscillator (DPO), which has a nominal low temperature value of Q-1 ≈ 2×10-8. We find that annealing the DPO in vacuum at 300°C for 3 hours systematically reduced Q-1 at all temperatures and revealed a 100K internal friction peak by permanently removing it. We also fi
Mat. Res.. Publicado em: 18/06/2018
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31. Effect of different bonding protocols on degree of monomer conversion and bond strength between orthodontic brackets and enamel
Abstract The objective of the present study was to evaluate the effect of different surface treatments and polymerization protocols on the bond strength of brackets to enamel, and the degree of conversion of the bonding agents. 120 bovine crowns were embedded in acrylic resin blocks and sanded. Next, the blocks were randomly assigned into 12 groups. Metal br
Braz. oral res.. Publicado em: 11/06/2018
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32. Efeito da contaminação por saliva na resistência adesiva de braquetes cerâmicos utilizando uma resina ortodôntica hidrofílica
Resumo Introdução Alguns fatores, como a presença de saliva, são capazes de influenciar a adesão do braquete ao dente durante o procedimento de colagem e podem causar falha da resistência adesiva. Objetivo O objetivo deste estudo foi avaliar a resistência ao cisalhamento de braquetes cerâmicos ortodônticos colados com Transbond XT e Transbond Pl
Rev. odontol. UNESP. Publicado em: 2018-06
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33. The effect of hydrofluoric acid and resin cement formulation on the bond strength to lithium disilicate ceramic
Abstract To investigate how the hydrofluoric acid (HF) concentrations applied to a lithium disilicate glass-ceramic (EMX) affects the surface morphology and microtensile bond strength (μTBS) of ceramics to dentin, using light-cured resin cements with or without UDMA. Sixty-three EMX square ceramic blocks were etched for 20 seconds using different HF concent
Braz. oral res.. Publicado em: 24/05/2018
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34. UV induced surface modification on improving the cytocompatibility of metallocene polyethylene
ABSTRACT Demand for medical implants is rising day by day as the world becomes the place for more diseased and older people. Accordingly, in this research, metallocene polyethylene (mPE), a commonly used polymer was treated with UV rays for improving its biocompatibility. Scanning electron microscopy (SEM) images confirmed the formation of crests and troughs
An. Acad. Bras. Ciênc.. Publicado em: 2018-03
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35. Effect of erosive challenges on deciduous teeth undergoing restorative procedures with different adhesive protocols - an in vitro study
ABSTRACT Objective: To evaluate the effect of erosive challenges on the tooth- restoration interface of deciduous teeth treated with different adhesive protocols. Material and Methods: Deciduous molars were cut mesiodistally, then embedded, abraded and polished (n=80). Samples were randomly divided according to the adhesive system used into: G1 (Adper Sing
J. Appl. Oral Sci.. Publicado em: 18/01/2018
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36. Dependence of E-H transition in argon ICP discharges for treatment of organic molecules
ABSTRACT Plasma surface cleaning is an alternative process that aims at the fully removal of organic contaminants on several kinds of materials. Despite its advantages, there are still lacks on the comprehension of the complex relations between plasma-generated species and organic molecules during plasma cleaning. In the present work, a linear alkane (hexatr
Matéria (Rio J.). Publicado em: 08/01/2018