scholarly journals Implant-supported orbital prosthesis: a technical innovation of silicone fabrication

2020 ◽  
Vol 6 (1) ◽  
Author(s):  
Mi Young Eo ◽  
Yun Ju Cho ◽  
Truc Thi Hoang Nguyen ◽  
Mi Hyun Seo ◽  
Soung Min Kim
Keyword(s):  
Three Dimensional ◽  
Size Measurement ◽  
Require Time ◽  
Facial Prosthesis ◽  
Digital Reconstruction ◽  
Liquid Silicone ◽  
Orbital Prosthesis ◽  
Facial Prostheses ◽  
Mold Fabrication ◽  
Production Period

Abstract Background Silicone-based facial prostheses have traditionally been considered difficult to make and require time-consuming fabrication due to their basic liquid characteristics. Methods and results A detailed procedure for creating an ideal silicone orbital prosthesis was developed, including dental implant-supported retention, three-dimensional (3D) orbital scanning with symmetric volume and size measurement based on matching the opposite side, master mold fabrication for convenient pouring of the liquid silicone elastomer, and easy and comfortable management of the prosthesis by the patient. Conclusion A silicone orbital prosthesis could be more easily and conveniently produced using updated surgical skills and modern 3D technology. The combination of 3D scanning with digital reconstruction and an innovative fabrication protocol using a reproducible major mold and multiple prototypes fitting resulted in an accuracy personalized facial prosthesis with accessible cost and short production period.

scholarly journals POSSIBLE DEFECTS IN WOOD, WOOD PARAMETERS VARIABILITY AND SOME OF ITS INFLUENCE ON QUALITY OF BUILDING STRUCTURE

2015 ◽  
Vol 7 (2) ◽  
pp. 67-80
Author(s):  
Jaroslaw Malesza
Keyword(s):  
Three Dimensional ◽  
Residential Building ◽  
Theoretical Description ◽  
Construction Technology ◽  
Structural Elements ◽  
Require Time ◽  
Factory Production ◽  
3D Elements ◽  
Load Increase

Paper specifies the wood-framed with sheathing construction including phases of realization and exploitation. Methods of investigation based on practice and theory has been employed where practical identification of processes and their phases were presented with theoretical description of structure deformation within the exploitation period. Obtained results of investigations are presented in the form of technologic and mechanic of structure diagrams for buildings with adequate algorithms of analysis. Paper presents practical systematic of construction stages, technological problems and hazards in respect of loading and construction technology with method of computation of vertical deformations of building. Paper presents evaluation of contribution of wood defects in response to loading in the wood-framed residential building in exploitation process. Location of knots, allocation of pith in the elements cross section, defects of slope of grain and influence of moisture decreasing is examined in the paper. The wood-framed with sheathing in the form of large panel or modular three dimensional 3D elements are the most often used technology. This kind of buildings are actually constructed up to four story as a multifamily or varying universal buildings like school, kid-garden or offices. Low dead load from 0.30 to 1.00 kN/m2 and its favorable proportion to the live load increase energy saving factor in realization and within the exploitation time. Low own weight of structure enables complete prefabrication of wall, floor and roof panels, improving quality of construction and shortening time of construction. Process of prefabrication, wide assortment and variety of factory production does not require time consuming processes and complicated moulds or shuttering indispensable in precast RC structural elements.

Reconstructive Architectural and Urban Digital Modelling

2018 ◽  
pp. 7856-7868
Author(s):  
Roberta Spallone
Keyword(s):  
Case Studies ◽  
Three Dimensional ◽  
Graphical Analysis ◽  
Basic Data ◽  
Three Dimensional Modeling ◽  
Digital Reconstruction ◽  
Dimensional Modeling ◽  
Original Shape ◽  
Methods And Techniques ◽  
Digital Modelling

The digital reconstruction of architectural and urban complexes which were demolished, transformed or have been only theoretically conceived, remaining 'on paper', is now a tool of considerable heuristic value, allowing to preserve, interpret and create new images of cultural heritages that no longer exist in their original shape or never reached a material construction. The tools, methods and techniques of representation (graphical analysis, two and three-dimensional modeling, animation, prototyping) should be carefully chosen, case by case, in order to interpret properly the basic data and create original interpretations, using as research sources and ideas not only the archival drawings and any surviving vestiges, but also the autograph writings and the more inspired analysis developed by the architecture critics. The examination of several international case studies, and also some experiences personally conducted highlights the different strategies used for the preservation of the memory of such heritage.

Digital reconstruction of three-dimensional serially sectioned optical images

1988 ◽  
Vol 36 (7) ◽  
pp. 1067-1075 ◽  
Author(s):  
F. Macias-Garza ◽  
A.C. Bovik ◽  
K.R. Diller ◽  
S.J. Aggarwal ◽  
J.K. Aggarwal
Keyword(s):  
Three Dimensional ◽  
Digital Reconstruction ◽  
Optical Images

Three-dimensional digital reconstruction of skin epidermis and dermis

2017 ◽  
Vol 270 (2) ◽  
pp. 170-175 ◽  
Author(s):  
P. LIU ◽  
J.-Y. ZHU ◽  
B. TANG ◽  
Z.-C. HU
Keyword(s):  
Three Dimensional ◽  
Digital Reconstruction ◽  
Skin Epidermis

Study on Integrated Method of Medical Implant Manufacture Based on Rapid Prototyping Technology

2008 ◽  
Vol 375-376 ◽  
pp. 353-357 ◽  
Author(s):  
Wei Ping Wang ◽  
Singare Sekou ◽  
Ya Xiong Liu ◽  
Di Chen Li ◽  
Bing Heng Lu ◽  
...  
Keyword(s):  
Rapid Prototyping ◽  
Computer Aided Design ◽  
Three Dimensional ◽  
Digital Information ◽  
Medical Implant ◽  
Integrated Method ◽  
Modeling Technology ◽  
Facial Prosthesis ◽  
Skull Model ◽  
Aided Design

The traditional method to manufacture the medical implant or prosthesis is based on sculpting and on the tissue site,or takes impressions of the entire face about human. The accuracy and efficiency of medical implant or prosthesis produced by conventional method is heavily relied on the skill and experience of both designer and manufacturer. In this paper, an integrated method of medical implant manufacture is approached. This integrated strategy was to establish a system that allows fabrication of facial prosthesis from digital information, and integrates the rapid prototyping with modeling technology of complex three-dimensional geometry from high-resolution non-invasive imaging, reverse engineering and computer aided design. The research results have shown that the integrated method can produce more exact-fit medical implant, that is, the physical model of the implant is more exactly fitted on the skull model. The advantages of this method are that the surgeon can plan and rehearse the surgery in advance, and a less invasive surgical procedure, and less time-consuming reconstructive, and an adequate esthetic can result.

scholarly journals Retraced memories - virtual reconstruction of an architectural landmark

2021 ◽  
Vol 12 (25) ◽  
pp. 124
Author(s):  
Simone Fallica ◽  
Raissa Garozzo ◽  
Cettina Santagati
Keyword(s):  
Three Dimensional ◽  
3D Models ◽  
Mount Etna ◽  
Ethical Principles ◽  
Digital Reconstruction ◽  
Virtual Reconstruction ◽  
Starting Point ◽  
Archival Documents ◽  
The Church ◽  
Digital Survey

<p class="VARAbstract">This paper addresses the challenge of digitally reconstructing ruined architectural sites and retracing their history, in order to virtually recompose their geometrical, stylistic and material integrity. To this end, the research team analyzed the ruins of the church of Santa Maria de Monasterio Albo, located in the ancient village of Misterbianco (Sicily) and destroyed (together with the entire hamlet) by the 1669 eruption of Mount Etna. In the last years, some excavation campaigns brought the church to the light, unveiling the remains of the main portal and six altars, which are one of the most remarkable examples of Mannerist art in eastern Sicily. This research aimed to three-dimensional (3D) reconstruct both the altars and the portal, ideally reviving their original 17<sup>th</sup> century configuration. This goal was achieved through an in-depth archival research (documents dating back to the years between 1300 and 1666 were consulted), an analysis of Classic and Renaissance treatises, and two integrated digital survey campaigns (laser scans and photogrammetry). The outcome is represented by the 3D models of the seven artifacts, which include surviving parts reconstructed as photogrammetric meshes, several fragments were placed in their likely early location through a virtual anastylosis, and NURBS (Non Uniform Rational Basis-Splines) surfaces (recreating the no longer existing elements). The latter were 3D modelled based on the treatises (which provided information on the correct proportioning) or in analogy with other coeval similar artifacts. Overall, the digital reconstruction was based on the ethical principles of transparency of the intervention, recognition of non-original additions and distinction between evidence and hypothesis, according to the London Charter and the Seville Principles. The experimentation provides a valid support for possible interventions in the real world and is the starting point to develop a digital archive of the site, which would make the different accuracy levels the reconstruction explicit.</p><p><strong>Highlights:</strong></p><ul><li><p>3D virtual reconstruction is effective to visualize and bring back to life ruined architectural artefacts.</p></li><li><p>Information about the artefacts original appearance was harvested through digital survey campaigns, archival documents, and comparisons with iconographic sources and coeval buildings.</p></li><li><p>The 3D reconstruction follows ethical principles of transparency and combines photogrammetric meshes (partly relocated through a virtual anastylosis) and NURBS surfaces.</p></li></ul>

scholarly journals The Benefits of 3D and 4D Synthesis of Marine Geophysical Datasets for Analysis and Visualisation of Shipwrecks, and for Interpretation of Physical Processes over Shipwreck Sites: A Case Study off Methoni, Greece

2021 ◽  
Vol 9 (11) ◽  
pp. 1255
Author(s):  
Panagiotis Gkionis ◽  
George Papatheodorou ◽  
Maria Geraga
Keyword(s):  
Temporal Integration ◽  
Three Dimensional ◽  
Physical Processes ◽  
Data Synthesis ◽  
Digital Reconstruction ◽  
Structure State ◽  
True Position ◽  
Spatio Temporal ◽  
Complex Geology

Through the study of three wreck sites over the Methoni Bay (Greece), this article presents the benefits of spatio-temporal integration and correlation of marine geophysical data in a common three-dimensional (3D) geographical platform for analysis, and visualisation of shipwreck ruins and for interpretation of physical processes over wreck sites. The integration of 3D datasets has been proven to support identification of archaeological features over and under the seafloor, evaluation of the wreck structure state, and assessment on the wrecking event and the wreck site arrangement at that time, due to interactive cross-examination of datasets acquired in separate planes. Data synthesis is fundamental for 3D digital reconstruction of scattered and partially buried shipwreck ruins in complex geology as every dataset acts as interpretive and complimentary to each other. It is also shown that data synthesis highlights the signatures of physical processes over the wreck sites, and the interaction between the processes and the shipwrecks. The analysis of spatio-temporal, four-dimensional (4D) integrated datasets has proved to provide knowledge on the wreck site evolution through time, and highlights the disturbance of underwater archaeological resources due to human activities. The study has also shown that the creation of a shoalest depth true position bathymetric surface supports the realistic 3D wreck representation over the seafloor.

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