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  • Three-dimensional finite element modelling of all-ceramic ...

    2013-5-1 · Anatomically accurate three-dimensional finite element models of a dental crown and 3-unit FPD can be generated by combining micro-CT scanning and Mimics software interactive tools. Tensile stresses were observed in the crown at the near-load area …

    Get Price
  • Three-dimensional surgical guide approach to correcting ...

    2020-12-29 · Three-dimensional surgical guide approach to correcting skeletal Class II malocclusion with idiopathic condylar resorption. ... His maxillary dental midline was coincident with the facial midline, while the mandibular dental midline deviated 1 mm to the right. ... To retract the proclined mandibular anterior teeth and obtain sufficient space ...

    Get Price
  • Three-dimensional finite element analysis of a porcelain ...

    2018-12-1 · Since anatomy of human teeth, have complex geometry a three-dimensional coordinate measuring machine (3D CMM) with the precision of 5 µm is used to generate an accurate three-dimensional solid model. Computer aiding design technology is used to translate the three-dimensional model form 3D CMM into ABAQUS finite element package for analysis.

    Get Price
  • Three-dimensional accuracy of different correction

    2014-3-3 · Three-dimensional accuracy of different correction methods for cast implant bars Ji-Yung Kwon, Chang-Whe Kim, Young-Jun Lim, Ho-Beom Kwon, Myung-Joo Kim* Department of Prosthodontics and Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Republic of …

    Get Price
  • Three-dimensional accuracy of different correction

    2014-2-14 · Three dimensional changes of gap, length and twisting after three correction methods were evaluated and was based on the measurement and comparison of (1) gap distances of the right abutment replica-gold cylinder interface (at buccal, distal, lingual side), (2) changes in bar length, and (3) axis angle changes of the right gold cylinders at the ...

    Get Price
  • JCM

    Early diagnosis and timely management of tooth or dental material wear is imperative to avoid extensive restorations. Previous studies suggested different methods for tooth wear assessment, but no study has developed a three-dimensional (3D) superimposition technique applicable in cases where tooth surfaces, other than the occlusal, undergo extensive morphological changes.

    Get Price
  • (PDF) Accuracy of three-dimensional printing for ...

    Three-dimen sional (3D) printing is a r ecent technological develop-. ment that may play a significant role in orthodontic diagnosi s and treatment. It. can be used to fabricate s kull models or ...

    Get Price
  • Anterior Decompensation Using Segmental Osteotomy for ...

    2015-7-1 · A, B, Three-dimensional compensation of the lower dentition. C, Panoramic radiograph before anterior decompensation using segmental osteotomy. The stone casts D,E, before and F,G, after model surgery. (The amount of 3-dimensional movement on the lower anterior teeth is …

    Get Price
  • MicroCT-scans of fossil micromammal teeth: Re-defining ...

    2011-10-15 · With the increased use of modern three-dimensional recording techniques such as X-ray Computed Tomography (CT), including high-resolution microCT (Ketcham and Carlson, 2001, Tafforeau et al., 2006), and advanced software to manipulate and analyze 3D data structures, the visualization and geometrical analysis of teeth has become more and more ...

    Get Price
  • Automated segmentation and description of the internal ...

    2020-10-27 · By removing the empty parts of each three-dimensional dataset containing no information about the teeth, we reduced the size of all datasets nearly three-fold, to approximately 1.11 GB per sample, or a total of 115 GB for all 104 teeth thus facilitating further handling of the data. Overview images for visual examination

    Get Price
  • Production of replacement teeth from a three

    [0021] A method for producing dental prosthesis parts is known from DE 196 42 247 C1 according to which a prepared tooth is digitized in order to then produce a dental prosthesis taking the digitized model teeth into consideration. To produce a dental prosthesis, according to WO 94/27523, a tooth is measured, a part of a tooth is prepared, a ...

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  • (PDF) Accuracy of three-dimensional printing for ...

    Three-dimen sional (3D) printing is a r ecent technological develop-. ment that may play a significant role in orthodontic diagnosi s and treatment. It. can be used to fabricate s kull models or ...

    Get Price
  • Materials

    The aim of this study was to evaluate the accuracy of dental models fabricated by conventional, milling, and three-dimensional (3D) printing methods. A reference model with inlay, single crown, and three-unit fixed dental prostheses (FDP) preparations was prepared. Conventional gypsum models (CON) were manufactured from the conventional method. Digital impressions were obtained by intraoral ...

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  • Accuracy of 3-Dimensional Virtual Surgical Simulation ...

    2017-11-1 · Purpose. To evaluate the accuracy of virtual surgical simulation combined with digital teeth alignment and the applicability of this technique to the diagnosis and establishment of a 3-dimensional (3D) visualized treatment objective for orthognathic surgery by comparing virtual simulation images with actual post-treatment images.

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  • Artificial Intelligence for Fast and Accurate 3 ...

    2021-5-1 · The architecture used was a feature pyramid network 24.Network architecture is demonstrated in Figure 1A–D.A detailed description of the CNN and hardware used are provided in Supplemental Appendices S2.2 and S2.3 (available online at www.jendodon.com).. Download : Download high-res image (1MB) Download : Download full-size image Figure 1.

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  • Efficient digitalization method for dental restorations ...

    2017-3-15 · Dental restoration is the repairing process of a damaged tooth, restoring it back to its normal appearance and function. Restoring the tooth with crown or inlay requires an accurate and precise ...

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  • Feasibility of using an intraoral scanner for a complete ...

    Statement of problem: The introduction of intraoral scanners has increased the use of digital technology in dental procedures. However, research on the extent of clinically recommended scans is lacking. Purpose: The purpose of this in vitro study was to compare 3D arch distortion according to the distance from the tooth at the beginning of a complete-arch scan made using an intraoral scanner.

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  • Digital modeling technology for full dental crown tooth ...

    2016-4-1 · A dental defect is one of the most common oral diseases, and it often requires a full crown restoration. In this clinical operation, the dentist must manually prepare the affected tooth for the full crown so that it has a convergence angle between 4° and 10°, no undercuts, and uniform and even shoulder widths and depths using a high speed diamond bur in the patient׳s mouth within one hour ...

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  • Interactive Tooth Segmentation Method of Dental Model ...

    Interactive Tooth Segmentation Method of Dental Model based on Geodesic . Shuai Yang . 1, a, Guanghao Jin . 1, b , Ruikun Wang . 1, c. and Yongzhen Ke . 1, d

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  • CPC Scheme - A61C DENTISTRY; APPARATUS OR

    A61C 8/00. Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools (fastening of peg-teeth in the mouth A61C 13/30) [2013-01] A61C 8/0001. . {Impression means for implants, e.g. impression coping} [2013-01]

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  • US8135569B2 - System and method for three-dimensional ...

    In accordance with various aspects of the present invention, a system and method for three-dimensional modeling of a complete tooth and/or teeth, including both root and crown, of a patient to facilitate dental and/or orthodontic treatment are provided, wherein a generic tooth model comprising generic root and crown components is combined with a crown-only model of one or more actual teeth of ...

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  • Research on the Deformation of Turbine Blades at

    2016-1-29 · machining process in the same way. The cutting resistance during machining was measured over the three direc-tional elements of the X, Y, and Z axes at the same time with a fixed dynamometer from HK & Co., type 9257B. When we measured the dimensions before and after machining of the TPs, we used a three-dimensional mea-suring instrument.

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  • Resorption: part 2. Diagnosis and management

    2013-5-24 · Flowable gutta percha and vertical condensation is then necessary for optimum three-dimensional obturation of the resorptive cavity (Figs 29a-b …

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  • Reverse Engineering Design of a Hydraulic Turbine Runner

    2015-7-20 · ranges through the three dimensional profile. The reason of the lack of performance in the turbine is investigated in accordance with CFD results. II. DESIGN. cloud is converted to intersection curves to form the CAD METHODOLOGY . Design methodology is developed with respect to basic steps of reverse engineering for a hydraulic turbine runner.

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  • Woodpecker Dental Products at Best Price Online ...

    Buy Woodpecker Dental Products. Woodpecker, the biggest ultrasonic scaler manufacturer, owns a maximal production and consumption of ultrasonic scaler in the world.The export volume of LED curing light is also in the leading position. In the past 26 years, Woodpecker has been focused on researching, developing, selling dental equipment.

    Get Price
  • Automated segmentation and description of the internal ...

    2020-10-27 · By removing the empty parts of each three-dimensional dataset containing no information about the teeth, we reduced the size of all datasets nearly three-fold, to approximately 1.11 GB per sample, or a total of 115 GB for all 104 teeth thus facilitating further handling of the data. Overview images for visual examination

    Get Price
  • TEMPERATURE AND MOISTURE EFFECTS ON COMPOSITE

    2019-11-26 · study were all appropriate for wind turbine blades in terms of low cost and low viscosity for easy processing by resin transfer molding (RTM). Specimens were conditioned in one of three ways: room temperature dry, 50°C dry in an oven and 50°C in distilled water. Water absorption was determined at 50°C both for composites and neat resins as a

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  • CNC Coordinate Measuring Machine CRYSTA-Apex V Series

    2021-6-17 · along three-dimensional surfaces, enabling complex workpieces to be measured most efficiently. High-speed measurement is unaffected by processing accuracy through real-time correction of path errors caused by differences between workpiece and design values. The V Series, with its high drive speed and acceleration combined with a

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  • Method of welding three-dimensional structure and ...

    BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a method of welding a plurality of members to manufacture a three-dimensional structure and an apparatus for use in such a method when a plurality of members are connected to be formed into a three-dimensional structure.

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  • Tooth angulation and dental arch perimeter—the effect of ...

    2014-10-14 · The anterior perimeter for well-aligned incisors and canines without angulation was used as reference (crown: 47.34mm; root: 39.13mm). An increase in the arch perimeter was obtained for all bracket prescriptions evaluated, which ranged from 0.28 and 3.19mm in the Edgewise technique, for the crown and root measurements, respectively, to 1.09 and 11.28mm for the Roth prescription.

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  • Dental 3D-Printing: Transferring Art from the Laboratories ...

    2021-1-4 · The rise of three-dimensional (3D) printing technology has changed the face of dentistry over the past decade. 3D printing is a versatile technique that allows the fabrication of fully automated, tailor-made treatment plans, thereby delivering personalized dental devices and aids to the patients.

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  • Three-dimensional evaluation of early crossbite correction ...

    The aim of this longitudinal study was to assess whether correction of unilateral posterior crossbite in the primary dentition results in improvement of facial symmetry and increase of palatal surface area and palatal volume. A group of 60 Caucasian children in the primary dentition, aged 5.3 ± 0.7 …

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  • February 3, 2020 X-Nav Technologies, LLC VP -

    2020-3-6 · The system provides the surgeon with a three-dimensional real time video visual aid to indicate dental drill location in space, with 6 degrees of freedom (X, Y, Z, Pitch, Yaw, and Roll) and anaccuracy (RMS) of < 1 mm. This helps to improve the Oral Surgeon drilling precision within a …

    Get Price
  • Overjet at the Anterior and Posterior Segments: Three ...

    2009-5-1 · With rapid advances in three-dimensional (3D) virtual technology, most parameters of the 3D virtual models could be measured as reliably and accurately as those of the plaster models.15,16 Moreover, 3D software programs currently on the market, such as Invisalign (Align Technology Inc, Santa Clara, Calif),17 SureSmile (OraMetrix Inc, Dallas, Tex),18 and 3Txer (Orapix Co Ltd, Seoul, Korea), …

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  • Simulation of orthodontic tooth movement during

    2021-4-29 · Since the establishment of the Tweed technique, closing loops have been widely used for space closure in the treatment of premolar extraction patients. 1, 2 Contrary to sliding mechanics, wherein friction generated during space closure can reduce the rate of tooth movement, 3, 4 loop mechanics is a frictionless treatment system. Therefore, this technique has the potential to produce ...

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  • Three-Dimensional Comparative Analysis of Bitemarks ...

    2021-8-23 · Three-Dimensional Comparative Analysis of Bitemarks ... The proposed method used the ABFO number 2 scale developed by Krauss and Hyzer for correcting for most photographic plane distortions of bitemarks in conjunction with the evolving technologies of laser scanners and comparative software commonly used by the automobile industry for 3D ...

    Get Price
  • Woodpecker Dental Products at Best Price Online ...

    Buy Woodpecker Dental Products. Woodpecker, the biggest ultrasonic scaler manufacturer, owns a maximal production and consumption of ultrasonic scaler in the world.The export volume of LED curing light is also in the leading position. In the past 26 years, Woodpecker has been focused on researching, developing, selling dental equipment.

    Get Price
  • (PDF) Methods for Managing 3-Dimensional Volumes

    TECHNO BYTES Methods for managing 3-dimensional volumes Asem Awaad Othman,a Amr Ragab El-Beialy,b Sahar Ali Fawzy,c Ahmed Hisham Kandil,c Ahmed Mohammed El-Bialy,c and Yehya Ahmed Mostafad Cairo, Egypt The introduction of 3-dimensional (3D) volumetric technology and the massive amount of information that can be obtained from it compels the introduction of new methods and new …

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  • Interactive Tooth Segmentation Method of Dental Model ...

    Interactive Tooth Segmentation Method of Dental Model based on Geodesic . Shuai Yang . 1, a, Guanghao Jin . 1, b , Ruikun Wang . 1, c. and Yongzhen Ke . 1, d

    Get Price
  • Tooth angulation and dental arch perimeter—the effect of ...

    2014-10-14 · The anterior perimeter for well-aligned incisors and canines without angulation was used as reference (crown: 47.34mm; root: 39.13mm). An increase in the arch perimeter was obtained for all bracket prescriptions evaluated, which ranged from 0.28 and 3.19mm in the Edgewise technique, for the crown and root measurements, respectively, to 1.09 and 11.28mm for the Roth prescription.

    Get Price
  • Early crossbite correction: a three-dimensional evaluation ...

    2009-5-27 · The faces and dental casts of the children were scanned using a three-dimensional (3D) laser scanning device at baseline (T0) and after six months (T1) of treatment. Student's t -tests were used to assess differences between the two groups in facial …

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  • Three-dimensional dental arch changes of patients ...

    The methods employed in this study, which included the use of the three-dimensional digitizer MicroScribe-3DX, a tool with proven efficacy, 15 allowed assessment of three-dimensional changes of dental arches and possible influences caused by orthodontic treatment and surgical therapy.

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  • The Andrews Foundation - 6Elements

    2016-10-12 · 6Elements . THE SIX ELEMENTS ORTHODONTIC PHILOSOPHY. Orthodontists can do more than straighten teeth and provide a nice smile to their patients. Orthodontic treatment can include three dimensional jaw movements and correction of dental arch discrepancies that result in improved health and function of the orofacial complex.

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  • Dental Technician - Ministry of Health

    2015-1-28 · dentist) into three design programs and written instructions into three-dimensional products based on accepted principles. • Make models of the mouth and teeth from impressions of the patient's mouth (taken by the dental prosthetist or dentist) • Build up wax replicas of part or all of the mouth and/or teeth using the model

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  • February 3, 2020 X-Nav Technologies, LLC VP -

    2020-3-6 · The system provides the surgeon with a three-dimensional real time video visual aid to indicate dental drill location in space, with 6 degrees of freedom (X, Y, Z, Pitch, Yaw, and Roll) and anaccuracy (RMS) of < 1 mm. This helps to improve the Oral Surgeon drilling precision within a …

    Get Price
  • A safe, stable, and convenient three-dimensional device ...

    2020-9-11 · Le Fort I osteotomy is a highly effective treatment for skeletal jaw deformities and is commonly performed. High Le Fort I osteotomy is a modified surgical procedure performed for improving the depression of the cheeks by setting the osteotomy higher than the conventional Le Fort I osteotomy. Developments in three-dimensional (3D) technology have popularized the use of 3D printers in various ...

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  • A Three-Dimensional Analysis of the Base Flexibility of ...

    1993-3-1 · The model was developed using the results of numerous finite element analyses of gear teeth and a nondimensional analysis of the results. Tooth end effects are considered through the application of the moment image method. The method is very simple and allows easy implementation in three-dimensional gear tooth deflection analysis schemes.

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  • Three-dimensional evaluation of upper anterior alveolar ...

    2011-12-6 · Objective The purpose of this study was to evaluate three-dimensional (3D) dehiscence of upper anterior alveolar bone during incisor retraction and intrusion in adult patients with maximum anchorage. Methods Twenty adult patients with bimaxillary dentoalveolar protrusion had the four first premolars extracted. Miniscrews were placed to provide maximum anchorage for upper incisor …

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  • Three-Dimensional Comparative Analysis of Bitemarks ...

    2021-8-23 · Three-Dimensional Comparative Analysis of Bitemarks ... The proposed method used the ABFO number 2 scale developed by Krauss and Hyzer for correcting for most photographic plane distortions of bitemarks in conjunction with the evolving technologies of laser scanners and comparative software commonly used by the automobile industry for 3D ...

    Get Price
  • [PDF] Tooth Flank Corrections of Wide Face Width Helical ...

    The tooth flank correction of power transmission helical gears with wide face width is studied by using a finite element based shaft deflection analysis program in conjunction with a numerical load distribution analysis procedure. The load distributions along the line of action, the elastic deflections and transmission errors of gear pairs are obtained by solving the equations of compatibility ...

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  • Three-dimensional finite element modelling of all-ceramic ...

    2013-5-1 · Anatomically accurate three-dimensional finite element models of a dental crown and 3-unit FPD can be generated by combining micro-CT scanning and Mimics software interactive tools. Tensile stresses were observed in the crown at the near-load area …

    Get Price
  • Three-dimensional surgical guide approach to correcting ...

    2020-12-29 · Three-dimensional surgical guide approach to correcting skeletal Class II malocclusion with idiopathic condylar resorption. ... His maxillary dental midline was coincident with the facial midline, while the mandibular dental midline deviated 1 mm to the right. ... To retract the proclined mandibular anterior teeth and obtain sufficient space ...

    Get Price
  • Three-dimensional finite element analysis of a porcelain ...

    2018-12-1 · Since anatomy of human teeth, have complex geometry a three-dimensional coordinate measuring machine (3D CMM) with the precision of 5 µm is used to generate an accurate three-dimensional solid model. Computer aiding design technology is used to translate the three-dimensional model form 3D CMM into ABAQUS finite element package for analysis.

    Get Price
  • Three-dimensional accuracy of different correction

    2014-3-3 · Three-dimensional accuracy of different correction methods for cast implant bars Ji-Yung Kwon, Chang-Whe Kim, Young-Jun Lim, Ho-Beom Kwon, Myung-Joo Kim* Department of Prosthodontics and Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Republic of …

    Get Price
  • Three-dimensional accuracy of different correction methods ...

    2014-2-14 · Three dimensional changes of gap, length and twisting after three correction methods were evaluated and was based on the measurement and comparison of (1) gap distances of the right abutment replica-gold cylinder interface (at buccal, distal, lingual side), (2) changes in bar length, and (3) axis angle changes of the right gold cylinders at the ...

    Get Price
  • JCM

    Early diagnosis and timely management of tooth or dental material wear is imperative to avoid extensive restorations. Previous studies suggested different methods for tooth wear assessment, but no study has developed a three-dimensional (3D) superimposition technique applicable in cases where tooth surfaces, other than the occlusal, undergo extensive morphological changes.

    Get Price
  • (PDF) Accuracy of three-dimensional printing for ...

    Three-dimen sional (3D) printing is a r ecent technological develop-. ment that may play a significant role in orthodontic diagnosi s and treatment. It. can be used to fabricate s kull models or ...

    Get Price
  • Anterior Decompensation Using Segmental Osteotomy for ...

    2015-7-1 · A, B, Three-dimensional compensation of the lower dentition. C, Panoramic radiograph before anterior decompensation using segmental osteotomy. The stone casts D,E, before and F,G, after model surgery. (The amount of 3-dimensional movement on the lower anterior teeth is …

    Get Price
  • MicroCT-scans of fossil micromammal teeth: Re-defining ...

    2011-10-15 · With the increased use of modern three-dimensional recording techniques such as X-ray Computed Tomography (CT), including high-resolution microCT (Ketcham and Carlson, 2001, Tafforeau et al., 2006), and advanced software to manipulate and analyze 3D data structures, the visualization and geometrical analysis of teeth has become more and more ...

    Get Price
  • Automated segmentation and description of the internal ...

    2020-10-27 · By removing the empty parts of each three-dimensional dataset containing no information about the teeth, we reduced the size of all datasets nearly three-fold, to approximately 1.11 GB per sample, or a total of 115 GB for all 104 teeth thus facilitating further handling of the data. Overview images for visual examination

    Get Price