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Journal articles on the topic 'STL StereoLithography File Format'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Agrawal, Sanat, Deon J. de Beer, and Yashwant Kumar Modi. "Conversion of a GIS surface data directly to a 3D STL part for terrain modeling." Rapid Prototyping Journal 20, no. 5 (2014): 422–30. http://dx.doi.org/10.1108/rpj-10-2012-0093.

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Purpose – This paper aims to convert surface data directly to a three-dimensional (3D) stereolithography (STL) part. The Geographic Information Systems (GIS) data available for a terrain are the data of its surface. It doesn’t have information for a solid model. The data need to be converted into a three-dimensional (3D) solid model for making physical models by additive manufacturing (AM). Design/methodology/approach – A methodology has been developed to make the wall and base of the part and tessellates the part with triangles. A program has been written which gives output of the part in STL

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Rotar, Raul Nicolae, Anca Jivanescu, Codruta Ille, et al. "Trueness and Precision of Two Intraoral Scanners: A Comparative In Vitro Study." Scanning 2019 (October 21, 2019): 1–6. http://dx.doi.org/10.1155/2019/1289570.

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The aim of this study was to evaluate the accuracy of two intraoral scanners used in the dental office. A molar fixed in a typodont was prepared for a ceramic onlay. The preparation was scanned using a high-resolution scanner (reference scanner) and saved as stereolithography (STL) format. The prepared resin molar was scanned again using the intraoral scanners, and all the scans were saved as well in STL format. All STL files were compared using metrology software (Geomagic Control X). Overlapping the meshes allowed the assessment of the scans in terms of trueness and precision. Based on the r

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Xu, Guang Shen, and Tian You Jing. "Research of Slicing CAD Models with Pro/TOOLKIT for Integral Stereolithography." Advanced Materials Research 321 (August 2011): 226–29. http://dx.doi.org/10.4028/www.scientific.net/amr.321.226.

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According to the requirements of integral Stereolithography (integral SL) System, a new direct slicing method under Pro/ENGINEER environment is developed. 3D CAD models are sliced with Pro/TOOLKIT in Pro/ENGINEER environment, and section image of 3D models can be obtained and saved as image format. Dynamic masks are produced with the cross-section images which obtained through the slicing method by dynamic pattern generator, and then 3D real prototyping is fabricated conveniently with integral SL System. A 3D tower model is sliced with this method, and the tower prototyping also is fabricated

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4

Xu, Guang Shen, Jian Ping Zhang, Sheng Luo, and Jing Jin. "Direct Slicing Cad Models with Solidworks for Integral Stereolithography System." Advanced Materials Research 148-149 (October 2010): 818–21. http://dx.doi.org/10.4028/www.scientific.net/amr.148-149.818.

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According to the requirements of integral Stereolithography (integral SL) System, a new direct slicing method with SolidWorks for integral Stereolithography System is developed. Slicing function of SolidWorks is employed to slice CAD models directly, and section image of 3D models can be obtained and saved as image format. Dynamic graphic masks for the integral SL System are created according to the cross-section images that obtained through the slicing method, and then 3D real prototyping can be fabricated conveniently. A 3D cup model is sliced with this method, and the cup prototyping also i

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Buschang, Peter H., Mike Ross, Steven G. Shaw, Doug Crosby, and Phillip M. Campbell. "Predicted and actual end-of-treatment occlusion produced with aligner therapy." Angle Orthodontist 85, no. 5 (2014): 723–27. http://dx.doi.org/10.2319/043014-311.1.

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ABSTRACT Objective: To compare three-dimensional (3D) ClinCheck™ models with the subjects' actual 3D posttreatment models using the American Board of Orthodontics Objective Grading System (OGS). Materials and Methods: This prospective, within-subject study included 27 consecutive cases treated with aligner therapy. The posttreatment plaster models taken immediately after treatment were scanned and converted to stereolithography (STL) files; the ClinCheck models were also converted to STL format. MeshLab software was used to measure the seven components of the OGS, including alignment, marginal

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Camargos, Germana De Villa, Priscilla Cardoso Lazari-Carvalho, Marco Aurélio de Carvalho, Mariane Boaventura Castro, Naysa Wink Neris, and Altair Antoninha Del Bel Cury. "3D finite element model based on CT images of tooth." Brazilian Journal of Oral Sciences 19 (August 14, 2020): e208910. http://dx.doi.org/10.20396/bjos.v19i0.8658910.

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Aim: This study aimed the description of a protocol to acquire a 3D finite element (FE) model of a human maxillary central incisor tooth restored with ceramic crowns with enhanced geometric detail through an easy-to-use and low-cost concept and validate it through finite element analysis (FEA). Methods: A human maxillary central incisor was digitalized using a Cone Beam Computer Tomography (CBCT) scanner. The resulted tooth CBCT DICOM files were imported into a free medical imaging software (Invesalius) for 3D surface/geometric reconstruction in stereolithographic file format (STL). The STL fi

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Miotti, Davide, Riccardo Zamolo, and Enrico Nobile. "A Fully Meshless Approach to the Numerical Simulation of Heat Conduction Problems over Arbitrary 3D Geometries." Energies 14, no. 5 (2021): 1351. http://dx.doi.org/10.3390/en14051351.

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One of the goals of new CAE (Computer Aided Engineering) software is to reduce both time and costs of the design process without compromising accuracy. This result can be achieved, for instance, by promoting a “plug and play” philosophy, based on the adoption of automatic mesh generation algorithms. This in turn brings about some drawbacks, among others an unavoidable loss of accuracy due to the lack of specificity of the produced discretization. Alternatively it is possible to rely on the so called “meshless” methods, which skip the mesh generation process altogether. The purpose of this pape

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Abedi, Soroush, Nadine Joachimowicz, Nicolas Phillips, and Hélène Roussel. "A Simulation-Based Methodology of Developing 3D Printed Anthropomorphic Phantoms for Microwave Imaging Systems." Diagnostics 11, no. 2 (2021): 376. http://dx.doi.org/10.3390/diagnostics11020376.

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This work is devoted to the development and manufacturing of realistic benchmark phantoms to evaluate the performance of microwave imaging devices. The 3D (3 dimensional) printed phantoms contain several cavities, designed to be filled with liquid solutions that mimic biological tissues in terms of complex permittivity over a wide frequency range. Numerical versions (stereolithography (STL) format files) of these phantoms were used to perform simulations to investigate experimental parameters. The purpose of this paper is two-fold. First, a general methodology for the development of a biologic

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Zhang, Ying, and Xin Shi. "Research on the Three-Dimensional Displaying of STL ASCII and Binary File." Advanced Materials Research 940 (June 2014): 433–36. http://dx.doi.org/10.4028/www.scientific.net/amr.940.433.

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Based on the detailed analysis of the STL file format, VC++ 6.0 programming language was used to extract the STL ASCII and binary file information, at the same time, using the OpenGL triangle drawing technology for graphical representation of the STL file, with rendering functions such as material, coordinate transformation, lighting, et al, finally realizing the loading and three-dimensional display of STL ASCII and binary file formats.

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Ji, Shi Jun. "Research on Compression Methods for ASCII STL File." Advanced Materials Research 108-111 (May 2010): 1254–58. http://dx.doi.org/10.4028/www.scientific.net/amr.108-111.1254.

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Two new types of ASCII format STL file are presented under lossless data compression and lossy implicit data compression respectively. In these new format file, a vertex with three coordinates which has degree n is stored only once rather than n times and three vertexes of a facet are saved by their indexes instead of by their three coordinates (x, y, z). As a result, the storage space of the vertex reduces to about 1/3 of its original space. It is very convenience for the file transmitting of network manufacturing. Moreover, the reading, writing and pretreatment time of data file are shortene

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Pang, Kai Min, Ying Zhang, Xin Shi, and Wen Jie Zhao. "In-Depth Research on the File Transformation between DXF&STL." Applied Mechanics and Materials 602-605 (August 2014): 3556–59. http://dx.doi.org/10.4028/www.scientific.net/amm.602-605.3556.

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Based on the in-depth analysis of the structure of DXF, STL files, there is lots of code information in entities of the 3D entity information-stored DXF files, which isn’t good for the use of the valuable information, ASCII format of STL files store the normal vector and vertex coordinates as 3D graphics data for storage in a cramped construction, easy for reading. While binary format of STL files store the information in bytes by rules. Take box as an example, and VC++6.0 programming language is used to program the data information, so as to read and display DXF file information, conduct data

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Liu, Pei Lin. "Research on Ship CAE Model Data Conversion." Applied Mechanics and Materials 278-280 (January 2013): 1153–57. http://dx.doi.org/10.4028/www.scientific.net/amm.278-280.1153.

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A set of self-defined model data structure using discrete boundary representation is designed in this paper, based which the modeling data is transformed from CAD to CAE pre-process. And so the geometric modeling function is realized. By the unified data interface, model data is read and transformed from a variety of mainstream and standard CAD model file such as IGES, STEP and so on. By studying and parsing the STL file and Tribon XML format file, the STL model file and ship CAD model data conversion is realized.

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Lai, Wei Hsiang, Chun I. Cheng, Mon U. Huang, and Hsiu Ming Chang. "Model Support Algorithm in Powder Based Three Dimensional Printer." Materials Science Forum 505-507 (January 2006): 1255–60. http://dx.doi.org/10.4028/www.scientific.net/msf.505-507.1255.

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Generally, rapid prototype system, it bases on the operation principle to process layer by layer, and has several kinds of hardware already. The input of STL file format has become the de facto standard in rapid prototyping. With the application of complex material, the variety of product-type using RP technology will be dramatically extended and, no more, be limited in model production. However under the structure of 3D printing, large item production will be possible only if specific support were applied. This study proposes the hardware and software integrated method with the subject of the

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Zeng, Li Li. "A Method of Numbered STL File Format for Recording Data." Applied Mechanics and Materials 462-463 (November 2013): 1102–5. http://dx.doi.org/10.4028/www.scientific.net/amm.462-463.1102.

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The paper has proposed an improved method of recording data in STL file format against disadvantages, such as high repetition of recording triangular meshes data and complex computation of vertex coordinate. Vertexes and normal vectors of triangular meshes are renumbered, and meshes data expressed by coordinate is changed into data stored by number. It facilitates the recording of triangular meshes data of depth images and provides a more simple way for establishing data storage model.

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Karavaev, A. S., and S. P. Kopysov. "A modification of the hexahedral mesh generator based on voxel geometry representation." Vestnik Udmurtskogo Universiteta. Matematika. Mekhanika. Komp'yuternye Nauki 30, no. 3 (2020): 468–79. http://dx.doi.org/10.35634/vm200308.

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We consider a modification of the previously developed voxel-based mesh algorithm to generate models given in STL-geometry format. Proposed hexahedral mesh generator belongs to the family of grid methods, and is general-purpose in terms of a capability to use as source data both volume (voxel) and STL-surface representation of model geometry. For now, the algorithm works with CAD models described in the well-known STL format. However, it also allows to handle higher-order surface patches defined in an arbitrary format if appropriate procedures for projection and intersection operations will be

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Fan, Li Rong, Yi Qing Cao, and Chong Ren. "Research on Entity Model Directly Layering Software Design Based on the Secondary Development of AutoCAD." Applied Mechanics and Materials 401-403 (September 2013): 491–94. http://dx.doi.org/10.4028/www.scientific.net/amm.401-403.491.

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FDM process of rapid prototyping systems at present which can only reads the STL format file, based on this format can be get the 2-d layer is composed of straight line segments connected polygon contour, makes the model layer of information that are geometric distortion, leading to surface accuracy is poorer; Produced based on STL model for layered geometric distortion problem, this paper put forward to directly layering of entity model, and through the ObjectARX which is the secondary development tools of AutoCAD realizes layer directly in the software, the layer of 2-d contour for smooth cu

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Abdullah, Johari Yap, Abdul Manaf Abdullah, Helmi Hadi, Adam Husein, and Zainul Ahmad Rajion. "Comparison of STL skull models produced using open-source software versus commercial software." Rapid Prototyping Journal 25, no. 10 (2019): 1585–91. http://dx.doi.org/10.1108/rpj-08-2018-0206.

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Purpose This paper aims to compare the automatic segmentation of medical data and conversion to stereolithography (STL) skull models using open-source software versus commercial software. Design/methodology/approach Both open-source and commercial software used automatic segmentation and post-processing of the data without user intervention, thus avoiding human error. Detailed steps were provided for comparisons and easier to be repeated by other researchers. The results of segmentation, which were converted to STL format were compared using geometric analysis. Findings STL skull models produc

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Hada, Tamaki, Manabu Kanazawa, Maiko Iwaki, et al. "Effect of Printing Direction on the Accuracy of 3D-Printed Dentures Using Stereolithography Technology." Materials 13, no. 15 (2020): 3405. http://dx.doi.org/10.3390/ma13153405.

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This study evaluated the effects of the differences in the printing directions of stereolithography (SLA) three-dimensional (3D)-printed dentures on accuracy (trueness and precision). The maxillary denture was designed using computer-aided design (CAD) software with an STL file (master data) as the output. Three different printing directions (0°, 45°, and 90°) were used. Photopolymer resin was 3D-printed (n = 6/group). After scanning all dentures, the scanning data were saved/output as STL files (experimental data). For trueness, the experimental data were superimposed on the master data sets.

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Moeck, Peter, Werner Kaminsky, and Trevor Snyder. "3D printing of crystallographic models for interdisciplinary college education." Acta Crystallographica Section A Foundations and Advances 70, a1 (2014): C1379. http://dx.doi.org/10.1107/s2053273314086203.

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Crystallographic models of molecule and crystal structures, crystal morphologies, Bravais lattices, space and point group symmetries, highly local and extended crystal defects, ... can all be encoded in the Crystallographic Information Framework (CIF) file format. While 3D printing has been available for at least 20 years, cost and performance improvements have only recently made 3D printing practical for usage by college educators and the general public. There is also an industry wide 3D printing standard, the STL file format. Virtual reality freeware programs that include conversions from CI

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Morovič, Ladislav, and Ján Milde. "CAD Model Created from Polygon Mesh." Applied Mechanics and Materials 808 (November 2015): 233–38. http://dx.doi.org/10.4028/www.scientific.net/amm.808.233.

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The paper deals with a description of the creation of CAD model (file format .IGES) based on polygon mesh (file format .STL) obtained by 3D scanning. On the basis of the imported polygon mesh into Reverse Engineering software, it is possible to create surface (or solid) CAD model. For CAD model created from a polygon mesh, a model of screw propeller was chosen. The paper also presents a color deviation map acquired by comparison between a polygon mesh and a CAD model. The 3D digitizing was performed by 3D scanner GOM ATOS II SO TripleScan; GOM ATOS Professional v7.5 SR2 software was used for p

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Cheng, Xiao Min, Zi Qing Ye, and Xin Hua Yi. "Rapid Prototyping of Handicraft Based on Reverse Engineering." Applied Mechanics and Materials 109 (October 2011): 451–54. http://dx.doi.org/10.4028/www.scientific.net/amm.109.451.

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Reverse Engineering of handicrafts refers to many aspects, such as data collection, data mergence of point clouds, surfaces reconstruction, and rapid prototyping. This paper takes a handicraft horse for example. Once this horse is scanned partially by using non-contact optical 3D measurement system, we can get point clouds data, and accumulate, merge, and combine them into one data file, then build up a three-dimensional picture, and obtain STL format file after slicing. Finally, rapid prototype manufacture can be used. By using this method, handicrafts that are the same as or similar with the

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Choi, J. W., Y. M. Ha, K. H. Choi, and Seok Hee Lee. "Fabrication of 3-Dimensional Microstructures Using Dynamic Image Projection." Key Engineering Materials 339 (May 2007): 473–78. http://dx.doi.org/10.4028/www.scientific.net/kem.339.473.

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As demand for complex precision parts increase, the existing fabrication methods such as MEMS, and LIGA technology have technical limitations with regard to high precision, high aspect ratio, and high complexity. A microstereolithography technology based on DMDTM(Digital Micromirror Device) can meet these demands. DMD enables a system to handle dynamic patterns. In this technology, the same standard format of the conventional rapid prototyping system, the STL file, is used, and 3D parts are fabricated by stacking layers that are sliced as 2D section from STL file. Whereas in conventional metho

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Cheng, Xiao Min, Zi Qing Ye, and Jian Jian Zhang. "Analysis and Reconstruct of Complex Data Based on 3D Laser Scanner." Advanced Materials Research 479-481 (February 2012): 2231–34. http://dx.doi.org/10.4028/www.scientific.net/amr.479-481.2231.

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Solve the problem of simplifying, aligning, and restoring while rebuilding a large number of point group data. First, scanning art work by using 3DFAMILY laser scanner and obtain the 3D data of its surface, then removing the desultory points on the boundary, using curvature simplification and point position alignment to revise data. Finally, fixing the loophole and modify the convex block partially and finishing up 3D reconstruction. We transform the reconstruction result into STL format file, and build the prototype of art work in Rapid Prototyping System.

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Lai, Xuhui, and Zhengying Wei. "Slicing Algorithm and Partition Scanning Strategy for 3D Printing Based on GPU Parallel Computing." Materials 14, no. 15 (2021): 4297. http://dx.doi.org/10.3390/ma14154297.

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Aiming at the problems of over stacking, warping deformation and rapid adjustment of layer thickness in electron beam additive manufacturing, the 3D printing slicing algorithm and partition scanning strategy for numerical control systems are studied. The GPU (graphics processing unit) is used to slice the 3D model, and the STL (stereolithography) file is calculated in parallel according to the normal vector and the vertex coordinates. The voxel information of the specified layer is dynamically obtained by adjusting the projection matrix to the slice height. The MS (marching squares) algorithm

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Tang, Hong Tao, Jian Xin Zhou, Xu Shen, Dun Ming Liao, Sheng Yong Pang, and Lin Wan. "Research and Development on CAD/CAE Integration of Casting Process System Based on IGES Neutral File." Materials Science Forum 762 (July 2013): 230–35. http://dx.doi.org/10.4028/www.scientific.net/msf.762.230.

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Nowadays, most 3D casting process CAD systems are developed based on second development tools of various 3D CAD systems. However the type and version escalation of various 3D CAD systems in foundry enterprises greatly limit the application of 3D casting process CAD systems. By the data exchange between the neutral file format of 3D geometric model, these problems can be well solved. In this study, by taking advantage of universal CAD data-exchange standard iges for data exchange, a practical 3D CAD system was developed based on opencascade geometry kernel. The system has the function of design

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Nayak, Chitresh, Amit Singh, Himanshu Chaudhary, and Abhishek Tripathi. "A NOVEL APPROACH FOR CUSTOMIZED PROSTHETIC SOCKET DESIGN." Biomedical Engineering: Applications, Basis and Communications 28, no. 03 (2016): 1650022. http://dx.doi.org/10.4015/s1016237216500228.

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The manufacturing of limb prosthesis socket that is comfortable for the amputee depends greatly on prosthetic practitioner’s knowledge of socket biomechanics and skill. It involves multistage manual corrections depending upon the clinical condition of the patient’s residual limb which may be affected by shrinkage or possible damage of plaster of paris (PoP) mold. The current work describes a novel process simplified through digitization, it integrates conventional PoP processes, reverse engineering (RE), and additive manufacturing (AM) technologies to design and develop a socket. The stereolit

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Wong, Kaufui V., and Aldo Hernandez. "A Review of Additive Manufacturing." ISRN Mechanical Engineering 2012 (August 16, 2012): 1–10. http://dx.doi.org/10.5402/2012/208760.

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Additive manufacturing processes take the information from a computer-aided design (CAD) file that is later converted to a stereolithography (STL) file. In this process, the drawing made in the CAD software is approximated by triangles and sliced containing the information of each layer that is going to be printed. There is a discussion of the relevant additive manufacturing processes and their applications. The aerospace industry employs them because of the possibility of manufacturing lighter structures to reduce weight. Additive manufacturing is transforming the practice of medicine and mak

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Yang, Hai Ru, Guo Zhi Chen, Hui Zhen Wang, and Liang Li. "3d Geometric Model of Transparent Tower Equipment Display in OpenGL." Applied Mechanics and Materials 722 (December 2014): 281–84. http://dx.doi.org/10.4028/www.scientific.net/amm.722.281.

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It’s difficult to describe the 3d geometry and to establish the 3d model of tower equipment in OpenGL. High-level command functions to define complex three-dimensional modeling is not provided in OpenGL. This paper introduces 3d model of the tower equipment how to display dynamically in OpenGL. Interface of OpenGL import 3d model is description in detailed. Storaging format and reading file of STL (Stereo Lithography) are elaborated. How to build the 3d model is descripted. When tower equipment displayed dynamically, what is the key step to establish the model of tower equipment. The dynamic m

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Lin, Alan C., and Nguyen Huu Quang. "A multiple slicing approach to automatic generation of parting curves." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 230, no. 12 (2016): 2165–81. http://dx.doi.org/10.1177/0954405415585271.

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A new slicing algorithm that uses multiple sets of cutting planes to automatically determine parting curves for three-dimensional parts is proposed. In this algorithm, one set of cutting planes is used to generate the slicing profiles, and two others are used to determine the intersection points with the inner and outer loops of the parting curves. The algorithm provides a highly effective solution for handling complicated models that contain free-form surfaces. The features of the algorithm are highlighted in three case studies using tessellated geometry in STL file format as the input. The r

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Van Heerden, Izél, Annabel Fossey, and Gerrie J. Booysen. "3D digital geometry designs for Poland’s syndrome using Magics and Geomagic® Freeform®." Rapid Prototyping Journal 24, no. 1 (2018): 229–36. http://dx.doi.org/10.1108/rpj-05-2016-0085.

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Purpose Poland’s syndrome patients often seek medical interventions to improve their aesthetic appearances. Design and manufacturing technologies make it possible to produce custom-made implants for such medical conditions. The purpose of this study was to compare the 3D digital geometries that were designed using Magics and Geomagic® Freeform® for two anonymous case studies of Poland’s syndrome patients. Design/methodology/approach Computed tomography data were acquired and processed in Mimics® to isolate the pectoralis muscles in STL file format. STL files were imported into Magics and Geoma

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Tribst, João Paulo Mendes, Larissa Marcia Marques Alves, Amanda Maria de Oliveira Dal Piva, et al. "Reinforced Glass-ceramics: Parametric Inspection of Three-Dimensional Wear and Volumetric Loss after Chewing Simulation." Brazilian Dental Journal 30, no. 5 (2019): 505–10. http://dx.doi.org/10.1590/0103-6440201902699.

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Abstract The aim of this study was to investigate the three-dimensional wear, volumetric loss and surface roughness after chewing simulation of two glass ceramics. Lithium disilicate (LD, Emax CAD, Ivoclar) and Zirconia reinforced lithium silicate (ZLS, Vita Suprinity, Vita Zhanfabrick) discs (n=20/g) were scanned to obtain stereolithography (STL) files for each sample. All discs were submitted to chewing simulation with sliding configuration (30 N, 300,000 cycles, 6 mm and 1.7 Hz) with steatite as antagonist. The samples were then scanned again and the volume loss and the deepest defect depth

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Khan, S. F., Kenneth W. Dalgarno, and Rakhmad Arief Siregar. "Indirect Additive Manufacturing (AM) of Apatite-Wollastonite (A-W) Glass-Ceramic for Medical Implants." Applied Mechanics and Materials 786 (August 2015): 354–60. http://dx.doi.org/10.4028/www.scientific.net/amm.786.354.

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Bone replacements for congenital defects, cancer resections, and traumas are typically performed using bone grafting. However, due to scarcity of the source material, synthetic materials for bone replacements are sometimes used instead. Unfortunately, the ability to engineer anatomically correct pieces of viable and functional human bone are difficult and time-consuming through conventional manufacturing methods. This paper proposes an alternative route which incorporates the use of AM technology for fabricating patient-specific implants. The implants were computer-aided design (CAD) from a st

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Ji, Daxiong, Faizan ur Rehman, Syed Ali Ajwad, et al. "Design and development of autonomous robotic fish for object detection and tracking." International Journal of Advanced Robotic Systems 17, no. 3 (2020): 172988142092528. http://dx.doi.org/10.1177/1729881420925284.

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In this article, an autonomous robotic fish is designed for underwater operations like object detection and tracking along with collision avoidance. The computer-aided design model for prototype robotic fish is designed using the Solid Works® software to export an stereolithography (STL) file to MakerBot, a 3D printer, to manufacture the parts of robotic fish using polylactic acid thermoplastic polymer. The precise maneuverability of the robotic fish is achieved by the propulsion of a caudal fin. The oscillation of the caudal fin is controlled by a servomotor. A combination of visual and ultra

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Shely, Asaf, Shiri Livne, Gil Ben-Izhack, et al. "The Influence of Laboratory Scanner Versus Intra-Oral Scanner on Determining the Implant Axis by Using Three Different Scan Abutments." Applied Sciences 11, no. 18 (2021): 8543. http://dx.doi.org/10.3390/app11188543.

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Background: The purpose of this in vitro study was to compare the implant axis’ spatial position and orientation by using laboratory scanner versus intra-oral scanner with three different scan abutments. Methods: A 3D model was printed with an internal hex implant analog in the place of teeth 35#. Three standard scan abutments were used: MIS (two-piece titanium), AB (two-piece PEEK and titanium base) and ZZ (one-piece PEEK). Each scan abutment was scanned 30 times by TRIOS E3 (laboratory scanner) and 30 times by Omnicam (intra-oral scanner). For each scan, an STL (stereolithography) file was c

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Kaminsky, Werner, Trevor Snyder, and Peter Moeck. "3D printing of crystallographic models and open access databases." Acta Crystallographica Section A Foundations and Advances 70, a1 (2014): C1278. http://dx.doi.org/10.1107/s205327331408721x.

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Although introduced 30 years ago, cost and performance improvements have only recently made 3D printing affordable. The industry wide input file format for 3D printers incorporates explicit mesh - `STL' data. Molecules and crystal structures, when including symmetry, crystal morphologies, or crystal defects are encoded in the parametrical `CIF' syntax. Free software for converting directly CIF data to STL files has just been developed, available online [1]. First examples of printed 3D models from STL-files created with these programs include molecules of sucrose, herapathite [2a], caffeine, h

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Tasaki, Satoko, Naoki Komori, and Soshu Kirihara. "Fabrication of Oxide Ceramics Dendrites for Porous Electrodes by Using Stereolithography." Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2012, CICMT (2012): 000152–57. http://dx.doi.org/10.4071/cicmt-2012-tp34.

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Porous oxide ceramics such as zinc oxide are applied for dye sensitized solar cell. This device requires consideration of high surface area, mechanical strengths and porous networks. Thus, we focused on the dendrite structures constructed from micrometer order rods with coordination numbers of 4, 8, and 12. There perfectly controlled structures were fabricated by stereolithography. Variations of the aspect ratios (lattice length to diameter ratios) were adjusted to control the porosity in the range 50–80 vol. % by using computer graphic software. The dendrite models sliced into a series of cro

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Cheng, Yih Lin, and Shyh Jye Chen. "Manufacturing of Cardiac Models Through Rapid Prototyping Technology for Surgery Planning." Materials Science Forum 505-507 (January 2006): 1063–68. http://dx.doi.org/10.4028/www.scientific.net/msf.505-507.1063.

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Rapid Prototyping (RP) Technology is capable of fabricating 3D freeform solid models from CAD models and has been widely used in communicating design concepts. Due to its distinctive characteristics, RP is very suitable in aiding surgery planning. Typical medical software used to display cardiac images can delineate both inner and outer structure but its images are virtual. Therefore, solid cardiac models made by RP technology provide a touchable reality to compensate for this deficiency. In this research, RP technology is utilized to assist cardiac surgery planning. CT-scanned image data were

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Zhao, Gang, Guocai Ma, Wenlei Xiao, and Yu Tian. "Feature-based five-axis path planning method for robotic additive manufacturing." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 233, no. 5 (2018): 1412–24. http://dx.doi.org/10.1177/0954405417752508.

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Additive manufacturing has been developed for decades and attracts significant research interests in recent years. Usually, the stereolithography tessellation language format is employed in additive manufacturing to represent the geometric data. However, people gradually realize the inevitable drawbacks of the stereolithography tessellation language file format, such as redundancy, inaccuracy, missing of feature definitions, and lack of integrity. In addition, it is almost impossible to apply the simple polygonal facet representation to the five-axis manufacturing strategy. Hence, there are qu

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Tasaki, Satoko, and Soshu Kirihara. "Zinc Oxide Modeling to Create Semiconductor Dendrites by Using Micro Stereolithography." Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2011, CICMT (2011): 000193–98. http://dx.doi.org/10.4071/cicmt-2011-wa24.

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Zinc oxide ceramics exhibit various semiconductor properties through optimized elements or materials doping. The elements doping of aluminum or gallium can control the electric conductivity, and composites doping of indium and rare earth such as yttrium can increase the thermoelectric conversion efficiency. In this investigation, dendritic lattice structures of the zinc oxide semiconductors with periodically ordered arrangements or self similar patterns were fabricated successfully to increase the surfaces area and porosity values by using micro patterning stereolithography of a computer aided

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Lakshmi, K. Swarna, and G. Arumaikkannu. "Influence of Process Parameters on Surface Finish in Customized Bone Implant Using Selective Laser Sintering." Advanced Materials Research 845 (December 2013): 862–67. http://dx.doi.org/10.4028/www.scientific.net/amr.845.862.

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Selective Laser Sintering(SLS) is a powder-based Additive Manufacturing process in which parts are built by sintering of selected areas of layers of Polyamide (PA12) powder using CO2 laser. The purpose of this work is to study experimentally the effect of orientation of the component, fill scan spacing and layer thickness on the surface roughness (Ra) of the customized bone implant fabricated through SLS technique. For this study computer tomography scan data was taken and converted to standard triangulation file (.stl) format using mimics software. Taguchis Design of Experiment approach was u

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Paul, Ratnadeep, and Sam Anand. "A combined energy and error optimization method for metal powder based additive manufacturing processes." Rapid Prototyping Journal 21, no. 3 (2015): 301–12. http://dx.doi.org/10.1108/rpj-07-2013-0065.

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Purpose – The purpose of this paper is to develop a methodology to analyze the total sintering energy (TSE) required for manufacturing a part in metal powder-based additive manufacturing (AM) processes and optimize AM processes for minimizing total energy and form errors of AM parts while maximizing part strength. Design/methodology/approach – The paper uses a computational geometry approach to determine the TSE expended for manufacturing a metal AM part. The stereolithography (STL) file of a part is converted into a voxel data structure and the total sintering volume (TSV) is computed from th

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Brewis, I., and J. A. Mclaughlin. "Improved Visualisation of Patient-Specific Heart Structure Using Three-Dimensional Printing Coupled with Image-Processing Techniques Inspired by Astrophysical Methods." Journal of Medical Imaging and Health Informatics 9, no. 2 (2019): 267–73. http://dx.doi.org/10.1166/jmihi.2019.2644.

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The aim of this study is to use image-processing techniques developed in the field of astrophysics as inspiration for a novel approach to the three-dimensional (3D) imaging of periprocedural medical data, with the intention of providing improved visualisation of patient-specific heart structure and thereby allowing for an improved quality of procedural planning with regards to individualized cardiovascular healthcare. Using anonymized patient DICOM data for a cardiac computed tomography (CT) angiography, two-dimensional slices of the patient's heart were processed using a series of software pa

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Sabbah, Aya, Georgios Romanos, and Rafael Delgado-Ruiz. "Impact of Layer Thickness and Storage Time on the Properties of 3D-Printed Dental Dies." Materials 14, no. 3 (2021): 509. http://dx.doi.org/10.3390/ma14030509.

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The purpose of this study was to evaluate the effect of printing layer thickness on the repeatability and surface roughness of 3D-printed dies and detect the effect of layer thickness and storage time on the dimensional stability of 3D-printed dies. One stereolithography (STL) file of an upper molar prepared for a full ceramic crown was used to print three groups of dies: 25 µm, 50 µm, and 100 µm. Repeatability was evaluated by linear and area measurements with a digital caliper and a digital metrology microscope. Dimensional stability was analyzed at 3 weeks, 6 months, and 1 year of storage t

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Мирненко, М. Д., Д. М. Крицький, О. К. Погудіна та О. С. Крицька. "ПОРІВНЯЛЬНИЙ АНАЛІЗ МЕТОДІВ ПОШУКУ НАЙБЛИЖЧИХ ТОЧОК НА ЗОБРАЖЕННЯХ ОБ’ЄКТІВ ТЕХНІЧНИХ СИСТЕМ". Open Information and Computer Integrated Technologies, № 92 (6 вересня 2021): 123–30. http://dx.doi.org/10.32620/oikit.2021.92.11.

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The subject of the study is the process of mapping the construction of point clouds of technical systems using the algorithm of the nearest points. The goal is to minimize the alignment criterion by converting a set of cloud points Y into a set of cloud points X in a software product that uses an iterative closest point (ICP) algorithm. Objectives: to analyze the properties of input images that contain point clouds; to review the algorithms for identifying and comparing key points; implement a cloud comparison algorithm using the ISR algorithm; consider an example of the algorithm for estimati

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Peditto, Matteo, Riccardo Nucera, Erasmo Rubino, et al. "Improving Oral Surgery: A Workflow Proposal to Create Custom 3D Templates for Surgical Procedures." Open Dentistry Journal 14, no. 1 (2020): 35–44. http://dx.doi.org/10.2174/1874210602014010035.

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Background: Computer-guided technologies are adopted in various fields of surgery to limit invasiveness and obtain patient benefits in terms of surgery duration and post-operative course. Surgical templates realized through CAD/CAM technologies are widely diffused in implant dentistry. The aim of this work is to propose, beyond implantology, the feasibility of application of 3D printed surgical templates in oral surgery procedures requiring osteotomies (like maxillary cyst enucleation and tooth disimpaction) in order to obtain accurate surgeries, avoid anatomical damage of surrounding structur

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Pandey, Rohit, and Sandeep Salodkar. "SCIENTIFIC AND TECHNOLOGICAL CHALLENGES OF LAYER MANUFACTURING PROCESSES FOR POLYMER COMPONENTS PRODUCTION." International Journal of Students' Research in Technology & Management 8, no. 3 (2020): 26–31. http://dx.doi.org/10.18510/ijsrtm.2020.835.

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Purpose of study: Additive manufacturing processes taking the basic information form computer-aided design (CAD) file to convert into the stereolithography (STL) data file. Today additive layer manufacturing processes are playing a very vital role in manufacturing parts with high rate of effectiveness and accuracy. CAD software is approximated to sliced containing information of each layer by layer that is printed. The main purpose of the study is to discuss the scientific and technological challenges of additive layer manufacturing processes for making polymer components production through va

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Peng, Matthew Jian-Qiao, Xiangyang Ju, Hai-Yan Chen, Bai Bo, and XinXu Li. "Comparative Analysis for Internal Fixations of Pauwels II by Biomechanical Finite Element Method." International Surgery 103, no. 9-10 (2019): 493–504. http://dx.doi.org/10.9738/intsurg-d-16-00236.1.

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Purpose: A series models of surgical internal fixation for femoral neck fracture of Pauwels II will be constructed by an innovative approach of finite element so as to determine the most stable fixation by comparison of their biomechanical performance. Method: Seventeen specimens of proximal femurs scanned by computed tomography in Digital Imaging and Communications in Medicine (DICOM) format were input onto Mimics rebuilding 3D models; their stereolithography (STL) format dataset were imported into Geomagic Studio (3D Systems, Rock Hill, South Carolina) for simulative osteotomy and non-unifor

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Wadhwa, Puneet, Hyon-Seok Jang, Se-Hyun Park, Hyoung-Ho Kim, and Eui-Seok Lee. "Computational Fluid Dynamic Analysis of the Pharyngeal Airway after Bimaxillary Orthognathic Surgery in Patients with Mandibular Prognathism." Processes 9, no. 1 (2021): 152. http://dx.doi.org/10.3390/pr9010152.

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This study aimed to analyze pharyngeal airflow characteristics and their relationship with the skeletal movement of the maxilla and mandible after bimaxillary orthognathic surgery in patients with skeletal class III (mandibular prognathism) malocclusion. Cone-beam computed tomography (CBCT) was conducted before surgery (T0), immediately after surgery (T1), and at least six months after surgery (T2). Digital imaging and communications in medicine files were transferred to InVivo (Anatomage) software to measure the skeletal changes after surgery. The changes in the maxillary and mandibular posit

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Gharini, Putrika Prastuti Ratna, Herianto Herianto, Nur Arfian, Ferdinandus Bayu Satria, and Nur Amin. "3 Dimensional Printing in Cardiology: Innovation for Modern Education and Clinical Implementation." ACI (Acta Cardiologia Indonesiana) 4, no. 2 (2018): 103. http://dx.doi.org/10.22146/aci.40855.

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Medical uses of three-dimension (3D) printing have advantages for many importances, such as tissue and organ fabrication, creation of prosthetics, and model structural anatomy. Visualization of 3-dimensional structure of heart for the importance of examination, management or education is not fully comprehensive describe toward the complexity of anatomical structure and also toward the illustration of medical procedure. The aim of this study was to identify the potential application of heart’s 3D printing for the enhancement of case understanding for doctor, medical students or residents and al

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Edelmann, André, Monique Dubis, and Ralf Hellmann. "Selective Laser Melting of Patient Individualized Osteosynthesis Plates—Digital to Physical Process Chain." Materials 13, no. 24 (2020): 5786. http://dx.doi.org/10.3390/ma13245786.

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We report on the exemplified realization of a digital to physical process chain for a patient individualized osteosynthesis plate for the tarsal bone area. Anonymized patient-specific data of the right feet were captured by computer tomography, which were then digitally processed to generate a surface file format (standard tessellation language, STL) ready for additive manufacturing. Physical realization by selective laser melting in titanium using optimized parameter settings and post-processing by stress relief annealing results in a customized osteosynthesis plate with superior properties f

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