scholarly journals Virtual Planning of a Complex Three-Part Bimaxillary Osteotomy

2017 ◽  
Vol 2017 ◽  
pp. 1-5
Author(s):  
Chiara Di Blasio ◽  
Marilena Laura Anghinoni ◽  
Alberto Di Blasio
Keyword(s):  
Ct Scan ◽  
Laser Scanning ◽  
New Technologies ◽  
Maxillofacial Surgery ◽  
Virtual Planning ◽  
Optical Scanning ◽  
Dentofacial Deformity ◽  
Maxillary Surgery ◽  
Bimaxillary Surgery ◽  
Complex Surgical Procedures

In maxillofacial surgery, every patient presents special problems requiring careful evaluation. Conventional methods to study the deformities are still reliable, but the advent of tridimensional (3D) imaging, especially computed tomography (CT) scan and laser scanning of casts, created the opportunity to better understanding the skeletal support and the soft tissue structures. Nowadays, virtual technologies are increasingly employed in maxillofacial surgery and demonstrated precision and reliability. However, in complex surgical procedures, these new technologies are still controversial. Especially in the less frequent cases of three-part maxillary surgery, the experience is limited, and scientific literature cannot give a clear support. This paper presents the case of a young patient affected by a complex long face dentofacial deformity treated by a bimaxillary surgery with three-part segmentation of the maxilla. The operator performed the surgical study completely with a virtual workflow. Pre- and postoperative CT scan and optical scanning of plaster models were collected and compared. Every postoperatory maxillary piece was superimposed with the presurgical one, and the differences were examined in a color-coded map. Only mild differences were found near the osteotomy lines, when the bony surface and the teeth demonstrated an excellent coincidence.

scholarly journals Stability of bimaxillary surgery on Class III malocclusion treatment

2012 ◽  
Vol 17 (6) ◽  
pp. 41-51 ◽  
Author(s):  
Fernando Antonio Gonçalves ◽  
Vânia Célia Vieira de Siqueira
Keyword(s):  
Muscle Adaptation ◽  
Class Iii ◽  
Class Iii Malocclusion ◽  
Mandibular Setback ◽  
Skeletal Malocclusion ◽  
Lateral Cephalograms ◽  
Maxillary Surgery ◽  
Bimaxillary Surgery ◽  
Student’S T ◽  
The Stability

OBJECTIVE: To evaluate the stability of bimaxillary surgery in patients with skeletal malocclusion, with the use of rigid internal fixation. METHODS: Lateral cephalograms from 20 patients, 11 males and 9 females, mean age of 26 years and 1 month, were evaluated before surgery, immediately post-operative and at least 6 months after surgery. Nineteen cephalometric measurements were evaluated, and the results were statistically analyzed by means of the Student's t test and the Kruskal-Wallis test. RESULTS: The Le Fort I maxillary advancement surgery showed almost no relapse. There was lack of stability of mandibular setback, with relapse of 37.33% on point B, due to counterclockwise rotation of the mandible between post-operative periods, occurred by better intercuspation after surgery and muscle adaptation. The results showed the same tendencies for both genders. CONCLUSION: It was concluded that on the bimaxillary surgery treatment of Class III malocclusion, the maxillary surgery was very stable, but the mandibular setback recurred. No statistical differences were found in surgical stability between genders.

scholarly journals IMAGE-BASED VIRTUAL TOURS AND 3D MODELING OF PAST AND CURRENT AGES FOR THE ENHANCEMENT OF ARCHAEOLOGICAL PARKS: THE VISUALVERSILIA 3D PROJECT

2017 ◽  
Vol XLII-5/W1 ◽  
pp. 639-645 ◽  
Author(s):  
C. Castagnetti ◽  
M. Giannini ◽  
R. Rivola
Keyword(s):  
Laser Scanning ◽  
New Technologies ◽  
Communication Technologies ◽  
Archaeological Sites ◽  
Current Configuration ◽  
Historical Investigation ◽  
Interactive Services ◽  
Spherical Images ◽  
Modern Experience ◽  
Historical Periods

The research project <i>VisualVersilia 3D</i> aims at offering a new way to promote the territory and its heritage by matching the traditional reading of the document and the potential use of modern communication technologies for the cultural tourism. Recently, the research on the use of new technologies applied to cultural heritage have turned their attention mainly to technologies to reconstruct and narrate the complexity of the territory and its heritage, including 3D scanning, 3D printing and augmented reality. Some museums and archaeological sites already exploit the potential of digital tools to preserve and spread their heritage but interactive services involving tourists in an immersive and more modern experience are still rare. The innovation of the project consists in the development of a methodology for documenting current and past historical ages and integrating their 3D visualizations with rendering capable of returning an immersive virtual reality for a successful enhancement of the heritage. The project implements the methodology in the archaeological complex of Massaciuccoli, one of the best preserved roman site of the Versilia Area (Tuscany, Italy). The activities of the project briefly consist in developing: 1. the virtual tour of the site in its current configuration on the basis of spherical images then enhanced by texts, graphics and audio guides in order to enable both an immersive and remote tourist experience; 2. 3D reconstruction of the evidences and buildings in their current condition for documentation and conservation purposes on the basis of a complete metric survey carried out through laser scanning; 3. 3D virtual reconstructions through the main historical periods on the basis of historical investigation and the analysis of data acquired.

scholarly journals ANÁLISIS MEDIANTE GEOMÁTICA DE TRES RETABLOS BARROCOS EN EL SURESTE ESPAÑOL: LA SINGULARIDAD DE UN PATRIMONIO RELIGIOSO DE INTERÉS TURÍSTICO

2021 ◽  
pp. 429-455
Author(s):  
Concepción Peña Velasco ◽  
Josefina García León ◽  
María de los Ángeles Riquelme Gómez
Keyword(s):  
Eighteenth Century ◽  
Comparative Analysis ◽  
Cultural Heritage ◽  
Laser Scanning ◽  
New Technologies ◽  
Raising Awareness ◽  
Tourist Resource ◽  
Nuevas Tecnologías

La documentación gráfica aportada por las nuevas tecnologías posee un enorme potencial para la investigación, docencia y difusión, que, en este caso, se ha aplicado a tres retablos del siglo XVIII, con categoría de BIC. Se ha realizado una modelización con Fotogrametría y Láser escáner. Los resultados, interpretados y debatidos por profesionales diversos, proporcionan información útil para el estudio del bien y permiten afrontar actuaciones de conservación y sensibilización patrimonial y plantear acciones destinadas a personas con discapacidad. Se hace un análisis comparativo y se reflexiona sobre la divulgación óptima como recurso turístico a partir de la documentación y análisis efectuados. Graphic documentation provided by new technologies has enormous potential for research, teaching and dissemination. In this study, the technique is applied to three eighteenth-century altarpieces, officially recognized as Cultural Heritage Assets. A modelling was performed using photogrammetry and laser scanning. The results, interpreted and discussed by a range of professionals, provide useful information for studying the altar pieces and a basis for planning conservation, raising awareness and proposing actions aimed at groups with disabilities. The study includes a comparative analysis and considers ways of optimizing use as a tourist resource based on this type of documentation and analysis.

scholarly journals INVESTIGATION INTO THE POTENTIAL OF SINGLE PHOTON AIRBORNE LASER SCANNING TECHNOLOGY

2019 ◽  
Vol XLII-2/W13 ◽  
pp. 927-934
Author(s):  
C. Bernard ◽  
J. P. Mills ◽  
J. Talaya ◽  
F. Remondino
Keyword(s):  
Laser Scanning ◽  
New Technologies ◽  
Single Photon ◽  
Preliminary Investigation ◽  
Airborne Laser Scanning ◽  
Acquisition Time ◽  
3D Mapping ◽  
Revolutionary Change ◽  
Airborne Laser ◽  
Open Datasets

<p><strong>Abstract.</strong> Following several years of incremental technological developments in airborne laser scanning, the field is currently witnessing potentially revolutionary change through the introduction of new technologies, namely Single Photon (SP) and Geiger-Mode (GM) lidar. These new sensors potentially provide more efficient approaches to perform high-resolution 3D mapping, but seemingly to the detriment of accuracy and noise. Despite concerns, the technology is perceived to offer higher efficiency with respect to conventional airborne laser scanning and additional 3D mapping capability in terms of swath width, spatial resolution, acquisition time and density of range returns. These developments have led to some European National Mapping and Cadastral Agencies (NMCAs) to consider a potential change in their production pipelines, while some mapping companies are contemplating upgrading their existing airborne sensor systems. However, few open datasets and experiences are available to inform such decisions, and the community is keen to learn more about the technology and its deployment for 3D territorial mapping. These facts and considerations motivated EuroSDR Commission 1 to launch a new initiative in 2018 to better understand, explore and report to its NMCA membership the developments in SP and GM technologies. This paper describes the activities that have thus far been conducted as part of this EuroSDR initiative, comprising: a global on-line questionnaire into awareness of the technology; a preliminary investigation into a Leica SPL100 dataset of Easton, USA; and a community workshop at which a proposal to run an international benchmarking exercise was discussed.</p>

scholarly journals A segmental osteotomy with 3D virtual planning to move a malpositioned dental implant

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Dario Andrés Bastidas ◽  
Lina Roldan ◽  
Pamela Ramirez ◽  
Andrés Munera
Keyword(s):  
Dental Implant ◽  
Human Error ◽  
Maxillofacial Surgery ◽  
Oral And Maxillofacial Surgery ◽  
Class Iii ◽  
Virtual Planning ◽  
Case Presentation ◽  
Reverse Torque ◽  
The Aesthetic ◽  
Surgery Department

Abstract Background Correct positioning and alignment of dental implants are crucial to successfully meet the aesthetic and functional criteria in implant-prosthetic rehabilitation. When an implant is in the wrong position, especially in the esthetical zone, there are limited options to solve it. Some techniques have been described to reposition implants, such as reverse torque, trephine drills, and segmental osteotomies; current approaches aim to reduce the damage of the periimplant tissues. Case presentation A 20-year-old man with good general health was referred to the oral and maxillofacial surgery department of the CES University, Medellin Colombia in 2017, He had undergone a previous camouflage orthodontic therapy for a dental Class III, which finished in 2014, posteriorly a dental implant was placed in 2015 to replace upper right lateral incisor (1.2) before vertical growth of maxilla was complete; therefore, the implant was retained in a coronal position. A segmental osteotomy was suggested to reposition the implant in a more caudal position, a 3D surgical cut guide obtained by virtual planning was used to increase osteotomy accuracy and lower human error, to avoid the risk of damaging the adjacent tissues and to achieve a predictable result. Conclusions The segmental alveolar osteotomy is an effective alternative to reposition an implant; however, it must be carefully planned because human error remains a possibility that may affect the final result. Therefore, 3D planning is a better way to minimize these mistakes during the surgical procedure and the final position of the implant.

scholarly journals EQUAL PROPORTION REPRODUCTION METHOD OF GROTTO BASED ON POINT CLOUD

2019 ◽  
Vol XLII-2/W15 ◽  
pp. 1215-1219
Author(s):  
P. Wei ◽  
A. Li ◽  
M. Hou ◽  
L. Zhu ◽  
D. Xu ◽  
...  
Keyword(s):  
3D Printing ◽  
Point Cloud ◽  
Laser Scanning ◽  
New Technologies ◽  
Rapid Development ◽  
Point Clouds ◽  
Equal Proportion ◽  
3D Laser Scanning ◽  
Printing Technology ◽  
3D Printing Technology

<p><strong>Abstract.</strong> The rapid development of 3D laser scanning and 3D printing technology provides new technologies and ideas for cultural relic protection and reproduction. Aiming at the requirement of equal proportional reproduction of large-scale grottoes, this paper takes the point cloud data of the 18th Cave of Yungang Grottoes obtained by 3D laser scanning as an example, and proposes a data processing and reproduction block partitioning method for equal proportion reproduction. The Cyclone, Geomagic and AutoCAD software were used to construct the 3D model of the grotto, and the 3D printing technology was used to realize the secondary design and model print. Among them, the research focuses on the modeling of massive point clouds and the method of model partitioning based on voxels. It can meet the requirements of movable and assembly while realizing the equal proportional reproduction of the whole grotto. The research results and application can be a good reference for the future grotto reproduction work.</p>

scholarly journals The Petawawa Research Forest: Establishment of a remote sensing supersite

2019 ◽  
Vol 95 (03) ◽  
pp. 149-156 ◽  
Author(s):  
Joanne C. White ◽  
Hao Chen ◽  
Murray E. Woods ◽  
Brian Low ◽  
Sasha Nasonova
Keyword(s):  
Remote Sensing ◽  
Laser Scanning ◽  
New Technologies ◽  
Open Data ◽  
Digital Terrain Model ◽  
Lessons Learned ◽  
Remotely Sensed Data ◽  
The Public ◽  
Terrain Model ◽  
Digital Terrain

The pace of technological change in forest inventory and monitoring over the past 50 years has been remarkable, largely asa result of the increased availability of various forms of remotely sensed data. Benchmarking sites, with the requisite refer-ence and baseline data for evaluating the capacities of new technologies, algorithms, and approaches, can be extremely valu-able for sparking innovation, as well as for enabling transparent and scientifically sound assessments of technologies, newdata streams, and associated information outcomes. Herein we describe the establishment of a remote sensing supersite atthe Petawawa Research Forest (PRF) in southern Ontario, Canada, and summarize the open access datasets that have beencompiled and made available to the public. The PRF is approximately 10 000 ha in size and represents a complex assemblageof tree species and forest structures. More than 1900 data records, including multiple airborne laser scanning datasets andassociated derivatives (i.e., digital terrain model, canopy height model), airborne imagery, satellite remote sensing timeseries, and ground plot data, among others, have been made openly available for download from Canada’s National ForestInformation System. We identify issues and present opportunities associated with the establishment of a remote sensingsupersite at the PRF, as well as share some of the lessons learned to foster the establishment and open data sharing for othernational and international remote sensing supersites. The PRF supersite can be accessed from the following link: https://opendata.nfis.org/mapserver/PRF.html .

scholarly journals Comparative evaluation between the “All on Four” and “Four on Pillars” techniques in 3D virtual planning associated with guided surgery on atrophic jaws

2021 ◽  
Vol 10 (14) ◽  
pp. e118101422021
Author(s):  
Marcelo do Lago Pimentel Maia ◽  
Daniel Souza Ferreira Magalhães
Keyword(s):  
Comparative Evaluation ◽  
Surgical Planning ◽  
Statistical Difference ◽  
Technical Knowledge ◽  
Successful Performance ◽  
Virtual Planning ◽  
Guided Surgery ◽  
Average Area ◽  
Maxillary Surgery ◽  
Edentulous Patients

Thorough technical knowledge and anatomical understanding are critical for optimal surgical results. The difficulty of complete maxillary surgery can vary significantly depending on the complexity of the anatomy or bone defect. In this work, we analyze and compare two methods of software-guided planning for the manipulation of dental implants, associated with the All on Four (ALL) and Four on pillars (FOUR) techniques used in patients with atrophic maxillae. Forty-two images of totally edentulous patients were analyzed, and surgical planning was performed using both methods. The average area of the Four on pillars technique is 4.9x (p<0.0001) greater than the average area of the All on four technique, this represents a difference of 489%. This means that, for the same force applied by the jaw, we will have a 4.9x smaller pressure, that is, a better distribution of forces on the jaws. It was not possible to notice a statistical difference between the success proportions (p=0.2542), this means that both techniques have a non-different (similar) success proportion. We conclude that the area of the polygon formed in the Four on pillars surgical plan is larger than in the All on four plan and this results in significantly less pressure on the implants. We also concluded that it was not possible to notice a statistical difference between the proportions of success, which shows that there is no technique with successful performance advantages over the other.

scholarly journals Towards a digitised process-wheel for historic building repair and maintenance projects in Scotland

2018 ◽  
Vol 8 (4) ◽  
pp. 465-480 ◽  
Author(s):  
Scott McGibbon ◽  
Mohamed Abdel-Wahab ◽  
Ming Sun
Keyword(s):  
Laser Scanning ◽  
New Technologies ◽  
Phase 1 ◽  
Digital Technologies ◽  
Optimum Process ◽  
Research Approach ◽  
Historic Building ◽  
Content Type ◽  
Action Research Approach ◽  
Skills Shortages

Purpose With the increasing demand for high-quality economical and sustainable historic building repair and maintenance (R&M) allied with the perennial problem of skills shortages (project management (PM) and on-site practice) investment in new technologies becomes paramount for modernising training and practice. Yet, the historic R&M industry, in particular small- and medium-sized enterprises have yet to benefit from digital technologies (such as laser scanning, virtual reality and cloud computing) which have the potential to enhance performance and productivity. The paper aims to discuss these issues. Design/methodology/approach A qualitative participatory action research approach was adopted. One demonstration project (Project A) exhibiting critical disrepair, showcasing the piloting of a five phased digitised “process-wheel” intended to provide a common framework for facilitating collaboration of project stakeholders thereby aiding successful project delivery is reported. Five semi-structured interviews were conducted with industry employers to facilitate the process-wheel concept development. Findings Implementing only Phase 1 of the digitised “process-wheel” (e-Condition surveying incorporating laser scanning) resulted in an estimated 25-30 per cent cost and time savings, when compared to conventional methods. The accrued benefits are twofold: provide a structured standardised data capturing approach that is shared in a common project repository amongst relevant stakeholders; inform the application of digital technologies to attain efficiencies across various phases of the process-wheel. Originality/value This paper has provided original and valuable information on the benefits of modernising R&M practice, highlighting the importance of continued investment in innovative processes and new technologies for historic building R&M to enhance existing practice and in form current training provision. Future work will focus on further piloting and validation of the process-wheel in its entirety on selected demonstration projects with a view of supporting the industry to digitise its workflows and going fully digital to realise optimum process efficiencies.

scholarly journals EXPERIMENT ON UAV PHOTOGRAMMETRY AND TERRESTRIAL LASER SCANNING FOR ICT-INTEGRATED CONSTRUCTION

2017 ◽  
Vol XLII-2/W6 ◽  
pp. 371-377 ◽  
Author(s):  
N. Takahashi ◽  
R. Wakutsu ◽  
T. Kato ◽  
T. Wakaizumi ◽  
T. Ooishi ◽  
...  
Keyword(s):  
Laser Scanning ◽  
Measurement Accuracy ◽  
New Technologies ◽  
Laser Scanner ◽  
Great Influence ◽  
Image Resolution ◽  
Fiscal Year ◽  
Productivity Improvement ◽  
Accuracy Requirement ◽  
The Difference

In the 2016 fiscal year the Ministry of Land, Infrastructure, Transport and Tourism of Japan started a program integrating construction and ICT in earthwork and concrete placing. The new program named “i-Construction” focusing on productivity improvement adopts such new technologies as UAV photogrammetry and TLS. We report a field experiment to investigate whether the procedures of UAV photogrammetry and TLS following the standards for “i-Construction” are feasible or not. In the experiment we measured an embankment of about 80 metres by 160 metres immediately after earthwork was done on the embankment. We used two sets of UAV and camera in the experiment. One is a larger UAV enRoute Zion QC730 and its onboard camera Sony &amp;alpha;6000. The other is a smaller UAV DJI Phantom 4 and its dedicated onboard camera. Moreover, we used a terrestrial laser scanner FARO Focus3D X330 based on the phase shift principle. The experiment results indicate that the procedures of UAV photogrammetry using a QC730 with an &amp;alpha;6000 and TLS using a Focus3D X330 following the standards for “i-Construction” would be feasible. Furthermore, the experiment results show that UAV photogrammetry using a lower price UAV Phantom 4 was unable to satisfy the accuracy requirement for “i-Construction.” The cause of the low accuracy by Phantom 4 is under investigation. We also found that the difference of image resolution on the ground would not have a great influence on the measurement accuracy in UAV photogrammetry.

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