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  • Three-Dimensional, Bifunctional Microstructured

    Three-Dimensional, Bifunctional Microstructured Polymer Hydrogels Made from Polyzwitterions and Antimicrobial Polymers Langmuir . 2019 Feb 5;35(5):1211-1226. doi: 10.1021/acs.langmuir.8b03410.

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  • Electrically Tunable Three-Dimensional Holographic ...

    2018-7-23 · An electrically tunable three-dimensional holographic photonic crystal made of polymer-dispersed liquid crystals was fabricated using a specially designed prism. This prism split a collimated laser beam into four beams which interfered with each other at the base of the prism to form a three-dimensional spatial light intensity pattern. The ...

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  • Dimensional Accuracy of Dental Models for Three-Unit ...

    2021-3-22 · Digital models can be used to manufacture various dental appliances including fixed prostheses [1]. The impressions made by digital oral scanners enable the three-dimensional (3D) modelling of teeth by a computer and the fabrication of fixed prostheses without conventional working models. It is understood that the fit of fixed prostheses is the most

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  • Three dimensional nanosuperstructures made of two ...

    2019-12-1 · Three-dimensional graphene foams derived from various templates through CVD have demonstrated high surface areas [59,60,152,153]. Those made of Ni foams offer a surface area up to 850 m 2 g −1, which can be modulated by tuning the number of layers deposited with different deposition time and flow rate . However, the intrinsic large pores of ...

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  • Preliminary Study on the Assessment of the Marginal Fit

    2020-9-7 · curable-resin provisional-fixed dental prostheses made by digital-light-processing (DLP) three-dimensional (3D) printing. A stainless-steel master model with two abutments was scanned, and five three-unit provisional bridges were designed and printed in …

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  • 3D printing of dental restorations: Mechanical

    2021-4-21 · In the seminal field of 3D printing of dental restorations, the time and cost saving manufacturing of removable and fixed dental prostheses from thermoplastic polymer materials employing fused filament fabrication (FFF) is gaining momentum. As of today, the additive manufacturing of the established semi-crystalline polyetheretherketone (PEEK) ...

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  • The potential of three-dimensional printing

    2019-4-1 · Additive manufacturing (AM), or three-dimensional (3D)-printing, is a process that enables the creation of three-dimensional objects from digital data using the layer-by-layer deposition of material . This method is already more than 30 years old . The first working device, the stereolithography apparatus, was developed in 1984 by Hull, C. W.

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  • Fabrication and deformation of three-dimensional

    2013-9-1 · f,g, SEM image of a fabricated nanolattice with a three-dimensional kagome unit cell. h – j , SEM ( h , i ) and transmission electron microscope dark-field ( j ) images of an engineered hollow ...

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  • Three‐Dimensional Microvascular Fiber‐Reinforced ...

    2011-7-15 · The method relies on sacrificial fibers woven into fiber preforms that, when removed by depolymerization and volatilization, create 3D microvascular networks inside the composite material. By circulation of functional liquids in the resulting channels, a diverse set of …

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  • Cement Thickness of Inlay Restorations Made of

    Purpose: To evaluate the marginal and internal cement thicknesses of inlay restorations made of various CAD/CAM materials using 3D X-ray micro-computed tomography (micro-CT) technique. Materials and methods: Caries-free extracted mandibular molars (N = 30) with similar size were randomly assigned to three groups (N = 10 per group). Mesio-occlusal-distal (MOD) cavities were prepared, and inlay restorations were obtained by milling out CAD/CAM materials …

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  • Three-Dimensional, Bifunctional Microstructured

    Three-Dimensional, Bifunctional Microstructured Polymer Hydrogels Made from Polyzwitterions and Antimicrobial Polymers Langmuir . 2019 Feb 5;35(5):1211-1226. doi: 10.1021/acs.langmuir.8b03410.

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  • Dimensional Accuracy of Dental Models for Three-Unit ...

    2021-3-22 · Abstract: Previous studies on accuracy of three-dimensional (3D) printed model focused on full arch measurements at few points. The aim of this study was to examine the dimensional accuracy of 3D-printed models which were teeth-prepped for three-unit fixed prostheses, especially at margin and proximal contact areas.

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  • Dental Unit - HENAN BAISTRA INDUSTRIES CORP. -

    China Dental Unit catalog of Hard Leather Computer Controlled Dental Unit Chair, Azdent Handled Design Medicine Cabinet Box with Lock provided by China manufacturer - HENAN BAISTRA INDUSTRIES CORP., page1.

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  • A Three Dimensional Unit Cell Model for the Analysis

    A Three Dimensional Unit Cell Model for the Analysis of Thermal Residual Stresses in Polymer Composites Reinforced with Wavy Carbon Nanotubes - Volume 5 Issue 33-34

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  • Three-dimensional thermal nanoimprinting by using

    We used a three-dimensional (3D) mold to produce multiheight structures made of polymer resin and, without using an etching process, we succeeded in fabricating 3D structures made of polymer resin in which no region carried a residual layer. We used such a structure, fabricated on a glass plate, to perform a calibration of layer-total internal ...

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  • Three-Dimensional Constitutive and Failure Modeling of ...

    Three polymer concrete materials (epoxy types) were con­ sidered to obtain the material constants associated with the proposed constitutive model. These are (a) a low-modulus epoxy, (b) a medium-modulus epoxy, and ( c) a high-modulus epoxy. Its application to these materials that were tested by Kelsey (12) is presented.

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  • Patient-Specific Surgical Implants Made of 3D Printed

    Additive manufacturing (AM) is rapidly gaining acceptance in the healthcare sector. Three-dimensional (3D) virtual surgical planning, fabrication of anatomical models, and patient-specific implants (PSI) are well-established processes in the surgical fields. Polyetheretherketone (PEEK) has been used, mainly in the reconstructive surgeries as a reliable alternative to other alloplastic ...

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  • Design and synthesis of two-dimensional covalent

    We have considered three two-dimensional (2D) π-conjugated polymer network (i.e., covalent organic frameworks, COFs) materials based on pyrene, porphyrin, and zinc-porphyrin cores connected via diacetylenic linkers. Their electronic structures, investigated at the density functional theory global-hybrid leve Celebrating our 2021 Prizewinners Winners of the 2019 Horizons Outstanding Paper ...

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  • Three‐dimensional Electrical Property Mapping with ...

    2009-12-21 · The conductivity behavior of MWCNT networks within the volume of polymer nanocomposite samples is analyzed with nanometer resolution in all three dimensions. It is demonstrated that close to but above the percolation threshold for electrical conduction most of the MWCNTs do not contribute to the conductive network within the nanocomposite.

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  • Additive Manufacturing Technology: Potential

    2014-11-22 · encompasses “dental.” ... the hundreds or thousands until a three-dimensional object emerges. Raw materials may be in ... 14 A polymer is a chemical compound made of small molecules that are arranged in a simple repeating struc-ture to form a larger molecule.

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  • Three dimensional printed nanostructure biomaterials

    2021-5-28 · 1.3.1. What is 3D printing? Three-dimensional printing (3DP) is a manufacturing process in which objects are made by fusing or depositing materials such as; plastic, metal, ceramics, powders, liquids, or even living cells in layers to produce a 3D object [].This process is also referred to as additive manufacturing (AM), rapid prototyping (RP), or solid free-form technology (SFF). 3D printers ...

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  • Three-dimensional thermal nanoimprinting by using

    We used a three-dimensional (3D) mold to produce multiheight structures made of polymer resin and, without using an etching process, we succeeded in fabricating 3D structures made of polymer resin in which no region carried a residual layer. We used such a structure, fabricated on a glass plate, to perform a calibration of layer-total internal ...

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  • Direct three-dimensional imaging of polymer-water ...

    2014-2-19 · Direct three-dimensional imaging of polymer-water interfaces by nanoscale hard X-ray phase tomography ... d Freiburg Materials Research Center (FMF), University of Freiburg, D-79104 Freiburg, Ger- ... material per unit mass. It is measured as Joules per kilogram and represented by Gy (SI unit).

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  • On three-dimensional dilational elastic metamaterials

    degree. The voids in the polymer are assumed to be vacuum. The lattice constant is chosen as New J. Phys. 16 (2014) 033032 T Bückmann et al 4 Figure 1. (a) Blueprint of a three-dimensional dilational metamaterial. A single unit cell is shown. This cell is composed of a checkerboard arrangement of a motif made of squares and triangles, and its ...

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  • Small Wind Turbines: Specification, Design, and

    2015-11-9 · 3D printed ABS polymer-based SWT blade with a stiffening core made of steel. Five different materials were considered in terms of turbine blade optimization: steel, aluminum alloy, glass fiber composite, carbon fiber composite, and ABS polymer for three-dimensional (3D) printing . Blades made of all listed materials have fulfilled the strength ...

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  • Investigating the effect of dental implant materials with ...

    2018-7-13 · Dental implants are made of metal, ceramic and polymer materials.2 The use of titanium (Ti) and tita-nium alloy (Ti-6Al-4V) dental implants is accepted as the gold-standard in dental implantology.3 In recent Correspondence to: Mr Turan Olgar, E-mail: [email protected] Received 13 July 2018; revised 17 December 2018; accepted 11 January 2019

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  • The role of three-dimensional morphology on the

    1 The role of three-dimensional morphology on the efficiency of hybrid polymer solar cells Stefan D. Oosterhout1, Martijn M. Wienk1, Svetlana S. van Bavel2,3, Ralf Thiedmann4, L. Jan Anton Koster1 ...

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  • Tailor Made Conductivities of Polymer Matrix for

    2019-5-25 · The thermal conductivity of graphene is limited in the transverse direction due to the exfoliation of the interplanar distance. In this study, the multiwalled carbon nanotubes (MWCNTs) with high thermal conductivities were immobilized into the exfoliated few layers graphene with an objective to enhance the transverse thermal conductivity of MWCNT embedded graphene three-dimensional …

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  • Fiber Composites Made of Low-Dimensional Carbon

    2020-5-8 · The additive materials include metal, inorganic, and polymer materials, such as silver nanowires, silicon nanoparticles, molybdenum disulfide nanoparticles, polypyrrole nanoparticles, etc. Basically, any nanomaterial can be added to GBFs to get graphene composite fiber. But one of the key problems is to control the structure of the composite fiber.

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  • powerful dental turbine oil for medical schools

    three-dimensional dental portable turbine unit air compressor made of polymer materials electric foot switch the dental portable turbine unit with weak suction system low-priced USA portable dental turbine unit bag air compressor suction system with large storage space

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  • Three-dimensional microarchitected materials and

    2021-7-22 · Unsupported Pt electrocatalysts demonstrate excellent electrochemical stability when used in polymer electrolyte membrane fuel cells; however, their extreme thinness and low porosity result in insufficient surface area and high mass transfer resistance. Here, we introduce three-dimensionally (3D) customized, multiscale Pt nanoarchitectures (PtNAs) composed of dense and narrow (for sufficient ...

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  • Conformation-modulated three-dimensional

    2018-2-21 · STATEMENT OF PROBLEM:Studies investigating the precision of 3-dimensional (3D) printed casts for fixed prosthodontics are scarce. PURPOSE:The purpose of this in vitro study was to compare the accuracy and reproducibility of dental casts made by …

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  • Three-dimensional comparative study on the accuracy

    2013-10-22 · Composite materials are made from two or more distinct materials. The properties of the composite ... chains that fixes the polymer in a three-dimensional array, limiting the motion considerably. Thermoplastic (such as polymethylmethacrylate-'Plexiglas') polymers are capable of being ... Metal matrices are used in car engines and turbine blades ...

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  • Definition Structure and Composition Matrices

    2017-11-24 · The concept of rationally designed human-made composite materials or metamaterials, together with advances in three-dimensional (3D) micro- and nanofabrication, has recently opened the door to mechanical properties that were previously inaccessible ().By virtue of mechanical metamaterials, applications have come into reach that require ultralow mass densities (2–4), ultrastrong materials ...

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  • Three-dimensional mechanical metamaterials with a

    Dental bridges made of polymer materials reveal only low loading capacity. This paper analyzes possible improvements of the loading capacity of polymer-based dental bridges reinforced by incorporated ceramic bars. Finite element (FE) analyses were performed to study the stress distribution caused by the mastication process in the bridge material.

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  • Finite element and experimental analyses of polymer

    The effect of three-dimensional morphology on the efficiency of hybrid polymer solar cells ... layer. As an alternative to fully organic solar cells, hybrid solar cells use a combination of organic and inorganic materials. This concept has been demonstrated by combining semiconducting polymers as donor with different inorganic materials ...

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  • (PDF) The effect of three-dimensional morphology on

    2020-6-19 · Three-dimensional (3-D) structures at the nanoscale are important in modern devices, although their fabrication with traditional top-down approaches is …

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  • Three-dimensional superlattice engineering with block ...

    Their topics include different aspects of the interaction of light with materials, optical properties of materials in laser-based processing, the effect on machining of a laser beam's state of polarization, powder-based three dimensional printing, laser interference lithography, radiation exposure and laser goggle selection, and trends in next ...

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  • powerful dental turbine oil for medical schools

    three-dimensional dental portable turbine unit air compressor made of polymer materials electric foot switch the dental portable turbine unit with weak suction system low-priced USA portable dental turbine unit bag air compressor suction system with large storage space

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  • Three-dimensional microarchitected materials and

    2019-3-18 · ament fibroblasts (SV-PDLs), and dental follicle (SV-F) cells obtained from mice were used as a tool to study periodontal tissue engineering. OCCM, SV-PDL, and SV-F cells were seeded onto three-dimensional poly lactic-co-glycolic acid (PLGA) scaffolds and cultured with the use of bioreactors or implanted subcutaneously in severe combined ...

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  • Cementum engineering with three-dimensional polymer

    An electrically tunable three-dimensional holographic photonic crystal made of polymer-dispersed liquid crystals was fabricated using a specially designed prism. This prism split a collimated laser beam into four beams which interfered with each other at the base of the prism to form a three-dimensional spatial light intensity pattern. The spatial light intensity pattern was then recorded ...

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  • Electrically Tunable Three-Dimensional Holographic ...

    2014-9-12 · Ceramics are strong and stiff, but their limited ability to stretch like putty or steels makes them unsuitable for many engineering applications. Meza et al. constructed ceramic nanolattices from aluminum oxide, in which the beams are designed to stretch rather than bend. A key parameter in lattice design is the ratio of the wall thickness to the beam radius.

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  • Strong, lightweight, and recoverable three

    2018-3-14 · In recent years, three-dimensional auxetic structures have attracted great interest. Generally, three-dimensional auxetic structures are of complicate geometries which make them difficult to fabricate, benefiting from the development of additive manufacturing technologies, many three-dimensional auxetic structures can be made from metals or polymers.

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  • The manufacture and characterization of composite

    2021-7-1 · Three-dimensional Modeling of Percolation Behavior of Electrical Conductivity in Segregated Network Polymer Nanocomposites Using Monte Carlo Method Heng Gu, Jiaojiao Wang, Choongho Yu To cite this version: ... The model is set up within a cubic space with unit length (non-dimensional). The purpose of scaling is to simplify the

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  • Three-dimensional Modeling of Percolation Behavior of ...

    2021-6-21 · In order to satisfy the increasing computational demands of micromechanics, the Finite-Volume Direct Averaging Micromechanics (FVDAM) theory is developed in three-dimensional (3D) domain to simulate the multiphase heterogeneous materials whose microstructures are distributed periodically in the space.

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  • Three-Dimensional Parametric Finite-Volume

    2013-10-22 · Composite materials are made from two or more distinct materials. The properties of the composite ... chains that fixes the polymer in a three-dimensional array, limiting the motion considerably. Thermoplastic (such as polymethylmethacrylate-'Plexiglas') polymers are capable of being ... Metal matrices are used in car engines and turbine blades ...

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  • Definition Structure and Composition Matrices

    2011-6-10 · Porcelain is a ceramic made by heating various raw materials in a kiln. During this process the kiln can reach temperatures of up to 1500 degrees Celsius. After baking, a glassy, translucent product is produced yielding high permeability and a white or off white color. Even though this material is known for its strength, it … Polymer v Porcelain Read Details »

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