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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 18 of 18 for “"acid etching"”.
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Retention of resin restorations by means of enamel etching and by pins
An investigation was conducted into the effect of acid etching of the enamel and the use of pins on the retention of direct filling resins when used for restoration of fractured incisor teeth. The retention secured by these techniques as related to the cavity design also was studied. Four different …
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A taphonomic investigation of the agency of microfaunal accumulation at Elands Bay Cave
… of the cranial and postcranial bones and on the acid etching (produced during digestion) on micromammal bones and teeth, caused by the various species of predator. Information on the habits of various predators was collected. This information was used in combination with the results obtained from …
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Influência de Recobrimento vítreo e ataque com ácido fluorídrico na topografia final da superfície Y-TZP e qualidade adesiva entre Y-TZP e cimento resinoso
… was to investigate the effect of hydrofluoric acid etching and glass coating on the ceramic surface, its interaction mechanisms on the Y-TZP surface and the consequence of it on the bond strenght between ceramic and resin cement. Both treatments aim to optimize adhesion at the interface. First …
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Effects of tooth quality, tooth structure, and cement mixing ratios on dental adhesion
… samples that retained the enamel wall. Sulfuric acid and tannic acid etching of dentin were performed for both ground and unground teeth. Unground dentin specimens were also exposed to thermal aging at 65° C. The torsional bond strength of the dental tissues under these modified processing …
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A rapid, non-destructive test to detect camshaft lobe grinding burn
… in abusively ground regions of the lobes. Acid etching at the time of grinding and subsequent microhardness measurements were employed to verify the x-ray depth results. The grinding operation was further characterized with use of profile and roughness measurements. Burn (defined as a …
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The Identification of Composite Resin Restorations within Natural Teeth
… identify composite restorations, including dyes, acid-etching, ultra-violet light (UVL), and Quantitave Laser Fluorescence (QLF). As enamel, dentine and composite resin all have different fluorescent properties, ultra-violet light (UVL) has been of particular interest as a method of detecting the …
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A Comparison of Three Debonding Techniques Employing Two Methods of Tooth Preparation
… conditioning and priming agents into a single acidic primer solution. The purpose of this investigation is to evaluate the three debonding techniques (shear-peel, tension, torsion) using stainless steel brackets and two different methods of tooth preparation (37% phosphoric acid+ primer vs. …
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Aggregation Behavior of Chiral Single-Walled Carbon Nanotubes and their Transport in Landfill Conditions
… Covalent functionalization was performed with acid etching where non-covalent modification was done with commonly used surfactants. Uniform dispersion of such SWNTs are used in aggregation transport studies. Results indicate that SG76 has higher aggregation propensity compared to SG65due to …
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Bonding properties of innovative CAD-CAM composite biomaterials for dental prostheses
… bonded were pretreated either with hydrofluoric acid etching or with alumina particles sandblasting followed by silanization (Monobond Plus, Ivoclar Vivadent). All specimens were bonded using Variolink DC (Ivoclar Vivadent) resin cement and submitted to thermocycling aging (10000 cycles). The …
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Method Development for Transmission Electron Microscopy of Carbon Nanotubes and for Distributed Sensing With Triboluminescent Materials in the Premise of Sustainable Infrastructure
… suspensions were prepared using an</p> <p>acid etching technique. The suspension properties were characterized with Raman spectroscopy and time-resolved dynamic light scattering measurements. The water containing functionalized SWNTs and MWNTs were incorporated in the mix design to prepare …
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Active braze alloys for metal single layer grinding technology
… removal of the braze alloy from the substrate by acid etching easier.
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Fiberoptic Microneedles for Transdermal Light Delivery
… useful photothermal energy using hydrofluoric acid etching of optical fibers. Microneedles etched for 10, 30, and 50 minutes, and an optical fiber control was compared for their ability to deliver diffuse light using three techniques. First, red light delivery from the microneedles was …
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Durability and Damage Analysis of Hybrid Multiscale Composites
… Growing MOFs require both de-sizing and acid etching of the fibers. Acid activation made the carbon fiber surface chemically active, furnishing better adherence between the MOFs and the carbon fibers. These MOFs were also utilized as a catalyst to grow carbon nanotubes on the carbon fiber …
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Nanostructured carbohydrate-derived carbonaceous materials
… produced. Removal of the template component by acid etching revealed the replication of the silica into mesoporous carbonaceous spheres (particle size ~ 5 μm), representing the inverse morphological structure of the original inorganic body. Surface analysis (e.g. FTIR) indicated a material …
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Evaluation of fluid transport processes in dental enamel. Methods to assess the relevance of enamel permeability in caries prevention and etching treatments.
… both enamel and dentine substrates. Particularly acid etching of dental enamel enamel has usually employed in bonding pro-cedures increasing microscopic roughness. Different acids have been tested in the litera-ture suggesting several etching procedures. The acid-induced structural transformations …
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Synthesis And In-Situ Charactorization Of Energy Storage Material
… F/g of GO. More pathways were created by nitric acid etching holes on the surface of the GO. This 3-D MnO2/HGO structure achieves a capacitance of 117.45 F/g, which is 1.65 times higher than that of MnO2/GO composite and 3.9 times higher than that of GO only. BET surface area, XRD and AC …
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Hydrogen terminated silicon surfaces: Development of sensors to detect metallic contaminants and stability studies under different environments
… levels of metallic contaminants in hydrofluoric acid. The sensor performance with respect to two non-contaminating reference electrode systems was evaluated. In the first case, conductive diamond was used as a reference electrode. In the second case, a dual silicon electrode system was used with …