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  • Three-dimensional finite element stress analysis: the ...

    The purpose of this study was to develop and report upon a methodology for a non-linear capacity 3D modeling finite element analysis evaluating the loading behavior of different partial denture designs. A 3D finite element model using human CT data was constructed. An original material constant conv …

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  • Three-dimensional analysis of mandibular growth and

    Normal and abnormal jaw growth and tooth eruption are topics of great importance for several dental and medical disciplines. Thus far, clinical studies on these topics have used two-dimensional (2D) radiographic techniques. The purpose of the present study was to analyse normal mandibular growth and …

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  • Three-dimensional digital planning of class III ...

    Purpose: Three-dimensional diagnosis has shown that orthodontic therapy could potentially move the roots of the teeth outside the original bone structure. The purpose of these case studies was to test the possibility of obtaining correct three-dimensional tooth positioning with clear aligners, thereby modifying the periodontal structure accordingly, at the same time.

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  • Accuracy of a system for creating 3D computer

    Three-dimensional imaging of dental tissues will have a major impact in dentistry if the images are accurate. The purpose of this study was to measure the accuracy and precision of a system for creating three-dimensional images of dental arches. Using vinyl polysiloxane impression materials and impr …

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  • Three-dimensional observation and analysis of ...

    2020-3-9 · Three-dimensional observation and analysis of remineralization in dentinal caries lesions. Kumiko Yoshihara 1,2, Noriyuki Nagaoka 3, Akiko Nakamura 4, …

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  • Three-dimensional differences between intraoral

    The mean distance between the IOS and CIS may be significantly different if they are not properly superimposed. The mean distance (-0.02 ±0.05 mm) between the IOS and CIS falls within the range of mucosa resilience. Thus, 3D differences between the IOS and CIS can be attributed to the different phys …

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  • What is 3D printing? How does a 3D printer work?

    SLS uses a high power laser to fuse small particles of powder into a mass that has the desired three dimensional shape. The laser selectively fuses powder by first scanning the cross-sections (or layers) on the surface of a powder bed. After each cross-section is …

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  • US5121329A - Apparatus and method for creating

    Apparatus incorporating a movable dispensing head provided with a supply of material which solidifies at a predetermined temperature, and a base member, which are moved relative to each other along 'X,' 'Y,' and 'Z' axes in a predetermined pattern to create three-dimensional objects by building up material discharged from the dispensing head onto the base member at a controlled rate.

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  • Optimum Design of the Dental Air-Turbine Handpiece

    2020-1-22 · An air-turbine and associated air supply tube was optimized as a dental air-turbine handpiece system. The system consists of an air-turbine with an impeller and a housing, and an air supply tube which supplies compressed-air to the air-turbine. The flow characteristics of the dental air-turbine handpiece system were investigated using ANSYS CFX.

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  • Micro chpt 3 Flashcards | Quizlet

    microscope uses two beams of light instead of one. prisms split each light beam, adding contrasting colors to the specimen. Therefore, the resolution of a DIC microscope is higher than that of a standard phase-contrast microscope. Also, the image is brightly colored and appears nearly three-dimensional. Fluorescence Microscopy.

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  • Denture flask fabrication using fused deposition

    2020-4-1 · Purpose. This paper describes a method for making a customized denture flask using fused deposition modeling (FDM) by three-dimensional (3D) printing. We have proposed a new digital dental prosthesis using conventional dental base materials and artificial teeth.

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  • Three-dimensional analysis of the relationship

    2018-12-27 · Three-dimensional analysis of the relationship between the structure of maxillary central incisor and the preparation of dental all-ceramic. Wang P(1), Sun F(1), Yu Q(1), Wu G(1). Author information: (1)Department of Prosthodontics, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, PR China.

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  • Optimum Design of the Dental Air-Turbine Handpiece

    2020-1-22 · An air-turbine and associated air supply tube was optimized as a dental air-turbine handpiece system. The system consists of an air-turbine with an impeller and a housing, and an air supply tube which supplies compressed-air to the air-turbine. The flow characteristics of the dental air-turbine handpiece system were investigated using ANSYS CFX.

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  • Dental Impressions: Definition, Types, And Uses |

    Three-dimensional visualization of composite fillings for dental identification using CT images. ... For the purpose of enhancing the border between the enamel and the composite resins, the images were displayed without pixel interpolation. ... the 3D CT reconstructed images created have value as an adjunctive method for dental identification ...

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  • Three-dimensional visualization of composite fillings

    Extracting quantitative three-dimensional unsteady flow direction from tuft flow visualizations Noriyasu Omata1 and Susumu Shirayama Department of Systems Innovation, School of Engineering, The University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo, 113-8656, Japan E-mail: [email protected] and [email protected]

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  • Extracting quantitative three-dimensional unsteady flow ...

    2018-10-1 · 1. Introduction. Elastomeric impression materials are commonly used in clinical dentistry and have been subject of numerous studies , , .In order to obtain clinically acceptable results, the effect of dimensional accuracy of elastomeric impression materials and impression procedures on the fabrication of prosthetic restorations should be taken into consideration , .

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  • Volumetric evaluation and three-dimensional

    2016-5-12 · Three-dimensional numerical simulation for a prototype pump-turbine has been performed to investigate the transient characteristics and flow behaviors in the startup process. The rotational speed, which varies with runner torque and inertial of the rotating systems, is obtained by hydraulic-force coupling method.

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  • Three-dimensional simulation of unsteady flows in a

    2019-4-8 · Three-dimensional printers have revolutionized many scientific fields with its low-cost, accessibility and ease of printing. In this paper, we show how stereolithography (SLA) based 3D …

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  • Three dimensional printing of metamaterial

    2020-6-1 · Methods. We analyzed variation in three-dimensional (3D) facial images of 7057 subjects: 3327 with 396 different syndromes, 727 of their relatives, and 3003 unrelated, unaffected subjects. We ...

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  • Three-dimensional finite element analysis in distal en ...

    Three-dimensional finite element models (FEM) of the maxillary dentition in which the second permanent molars had been extracted were constructed to include the periodontal membrane, alveolar bone, standard edgewise bracket (0.018 x 0.025 inch), stainless steel IA (0.016 x 0.022 inch), and MEAW (0.016 x 0.022 inch).

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  • Three-dimensional morphological evaluation of the

    Three-dimensional morphological evaluation of the hard palate in Korean adults with mild-to-moderate obstructive sleep apnea. Yu C(1), Ahn HW(2), Kim SH(2). Author information: (1)Department of Orthodontics, Medical College of Xiamen University, Xiamen, China. (2)Department of Orthodontics, Graduate School, Kyung Hee University, Seoul, Korea.

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  • A testing machine for dental air-turbine handpiece ...

    A portable test machine is described for determining three key characteristics of dental air-turbine handpieces: free-running speed, stall torque and bearing resistance. ... A purpose-made block ...

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  • A Numerical Study on Performance of Dental Air

    2017-9-1 · Three impeller samples used in commercial dental turbines (as listed in table 1) have been selected to be modeled and utilized for simulation purposes. In order to achieve an accurate modeling, first of all, the turbine handpieces have been disassembled, and the impellers are 3D scanned using a digitizer apparatus (Renishaw Company, model ...

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  • The role of three-dimensional printing in healthcare

    2020-9-1 · Three-dimensional printing (3D printing) includes a set of processes that link controlled materials together to build a 3D object. This process is typically performed layer by layer [ 1 ]. In another definition, 3D printing refers to any process by which 3D objects are formed when layers are fused in a row in a two-dimensional cross-section.

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  • Automatic three‐dimensional analysis of bone volume

    2019-4-8 · Three-dimensional printers have revolutionized many scientific fields with its low-cost, accessibility and ease of printing. In this paper, we show how stereolithography (SLA) based 3D …

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  • Three dimensional printing of metamaterial

    2017-5-1 · As displayed in Fig. 1, the studied Savonius turbine is composed of two semicircular blades with diameter, d, and height, H, divided by a gap, o.This space is reported as overlap ratio, OR, defined by o d; in this work all rotors have overlap ratio equal to 0.2.The diameter of turbine is 0.9023 m while the circular end plates are characterized by 1 m diameter.

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  • CFD study of Savonius wind turbine: 3D model

    2021-6-27 · Review and cite PRINTING, THREE-DIMENSIONAL protocol, troubleshooting and other methodology information | Contact experts in PRINTING, THREE-DIMENSIONAL to get answers

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  • Generation of 3D Tooth Models Based on Three

    2015-7-22 · CANTÍN, M.; MUÑOZ, M. & OLATE, S. Generation of 3D tooth models based on three-dimensional scanning to study the morphology of permanent teeth. Int. J. Morphol., 33(2):782-787, 2015. SUMMARY: The dental student should have thorough knowledge of the dental morphology and develop adequate manual skill

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  • Preservation of Human Dental Surface Micro-Topography

    2016-7-26 · 2. Collect three‐dimensional surface data from sample teeth using a dental‐grade CAD digitizer wand. 3. Employ CAM technology to mill a physical three‐dimensional replica of each sample tooth, using the CAD data collected in the preceding step. 4.

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  • Analysis of tooth movement in extraction cases using

    2018-3-19 · The dental profes-sional should have sufficient evidence to validate the switch from an air-turbine handpiece to an electric handpiece. However, there is little research quantifying the cutting efficiency of electric and air-turbine handpieces. Studies that do quantify cutting efficiency typically do so with only a single material. Purpose.

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  • Comparison of cutting efficiencies between electric and ...

    2018-2-2 · Three-dimensional Stress Distribution Around a Dental Implant at Different Stages of Interface Development L. Borchers and P. Reichart Journal of Dental Research 1983 62 : 2 , 155-159

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  • Three-dimensional Stress Distribution Around a

    2020-6-23 · Bioactive, degradable and multi-functional three-dimensional membranous scaffolds of bioglass and alginate composites for tissue regenerative applications P. Bargavi , a R. Ramya , b S. Chitra , a S. Vijayakumari , a R. Riju Chandran , a D. Durgalakshmi , c P. …

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  • Bioactive, degradable and multi-functional three ...

    2020-9-16 · Purpose. The accuracy of digital impressions is still controversial for complete arch implant cases. The aim of this study is to compare the accuracy of different intraoral scanners with the conventional technique in terms of trueness and precision in a complete arch implant model.

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  • Three‐Dimensional Accuracy of Conventional Versus

    2015-1-23 · The ability to identify the three 'unsafe' air turbine handpiece faults (broken chuck, loose spray cap and loose back cap). Standard There are no published guidelines on this topic.

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  • Operator's ability at assessing a high-speed (air

    2021-5-26 · Compared with a 2D section, a three-dimensional (3D) model can reflect the spatial information of the components of organs, which is widely used for ascertaining 3D architectural information. 15 ...

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  • Three-dimensional reconstruction of systematic ...

    2021-6-15 · The VAWT model with three straight blades was made of aluminum. The main parameters of the turbine are shown in Table 2. The turbine model was 0.94 m high and the rotational radius was 0.27 m. Each blade was 0.72 m long, 0.025 m wide and 0.001 m thick. The mass of the turbine model without blade was 484 g.

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  • A user-friendly method for constructing realistic

    2020-8-10 · First, a 3D digital dental model and three intraoral images are obtained by a 3D scanner and digital single-lens reflex camera. Second, the camera projection poses for every intraoral images are calculated by using the single-objective optimization algorithm. ... A user-friendly method for constructing realistic dental model based on two ...

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  • Three-Dimensional Analysis of Dental Casts by Means

    2018-3-3 · Three-Dimensional Analysis of Dental Casts by Means of the Optocom. F.P.G.M. Van der Linden, H. Boersma, T. Zelders, K.A. Peters, and J.H. Raaben. ... The e-mail addresses that you supply to use this service will not be used for any other purpose without your consent.

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  • Factors Affecting Dental Air-Turbine Handpiece

    2012-7-1 · Air-turbine handpieces have been used for most dental cutting procedures for more than 50 years since the invention of the Borden Air rotor in 1957. 1 Although some improvements such as push-button bur release, swivel coupling, and fiber-optic illumination have made it more convenient for use, the main component, a turbine rotor supported by two miniature ball bearings, remains unchanged. 1 ...

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  • Accuracy evaluation of a new three-dimensional ...

    2013-8-2 · The article introduces a new method for three-dimensional reproduction of edentulous dental casts, and wax occlusion rims with jaw relation by using a …

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  • Advanced And Refurbished, Oral-Safe dental

    Glass ionomer cement material Fluoroaluminosilicate glass powder and polyacrylate solution application restorative filling of class 111, V cavities, wedge-shaped defect, liner & base shade three colors package 3bottles powder*20g+3bottle liquid*16ml quantity high quality material high compression strength, low polymerization heat certificate ISO13485; CE warranty three years About the dental ...

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  • Three‐dimensional design of a geometric model for

    2020-7-23 · Purpose. Fitting a customized ocular prosthesis for anophthalmic patients entails an artisanal labour-exhausting process and is standardly based on impression moulding of the socket, which may be anatomically inaccurate. The objective of the study was to design an impression-free socket mould with three-dimensional (3D) technology. Methods

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  • Three-dimensional printing of surgical guides for ...

    2021-5-14 · Three-dimensional printed surgical guides have sufficient accuracy and physical strength to meet the clinical requirements of difficult mandibular distraction osteogenesis. With the help of 3D printed surgical guides, we were able to shorten operative time significantly. Prospective studies are required to confirm our findings.

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  • The Best Industrial Metal and Plastic 3D Printers I 3D

    2021-7-5 · ProX SLS 6100. Production-grade nylon 3D printer delivering best-in-class part quality, fast build times and automated production tools. ProX 800. SLA quality at high throughput to address the broadest range of applications. ProJet MJP 2500/2500 Plus.

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  • The Study on Three-Dimensional Roughness of

    For the purpose of investigating the effect on surface micro-topography of cutting parameters in high speed milling of SiCp/Al Composites, the high speed milling experiments were performed .The machined surface was measured by Taylor Hobson roughness tester and OLS3000 Confocal Laser Scanning Microscope. The acquired surface data was dealt with the three-dimensional roughness method.

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  • Comparison of cutting efficiencies between electric

    The S-max M600 obtained a cutting efficiency of 6.13 mm 3. TG-98 and TRAUS ATN-400 showed similar efficiencies of 2.914 and 3.05 mm 3 , respectively. There was a significant difference in the ...

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