Study on the Clinical Effects of 3D Printing Combined with Mirror Technology and Computer 3D Reconstruction Technology in Assisted Treatment of Complex Fracture Surgery

Abstract Objective The purpose of this study was to apply concentrated growth factor (CGF) to the transplanted area with inflammation, to observe the clinical effects of CGF on the inflammation area assisted by 3D printing technology. Methods A total of 52 compromised mandibular first or second molar with chronic periapical lesions were transplanted with mature third molars. The patients were divided into CGF group (n = 26) and control group (n = 26) and transplanted into fresh extraction sockets with or without CGF. All the patients underwent clinical and radiographic examinations during the follow-up. Results Average surgery and extra-oral time were 39 min (± 7.8) and 42 s (± 10.2). The success rates of CGF group and control group were 100% and 92.3% respectively. Most of the periapical lesions in CGF group healed completely within 3 months, which was significantly faster than control group. The initial stability of CGF group was better than control group immediately after operation, and the degree of pain in CGF group was lower than control group on the 1st and 3rd day after operation. Conclusions The application of CGF in recipient site with chronic periapical lesions can accelerate the regeneration of alveolar bone and the healing of inflammation, greatly shorten the healing period. Meanwhile, CGF help to reduce postoperative pain and reaction at the early stage of healing and increase the success rate of autogenous tooth transplantation (ATT). Additionally, the use of 3D printing model can greatly reduce the extra-oral time of donor teeth.

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Re: Use of 3D Reconstruction Cloacagrams and 3D Printing in Cloacal Malformations

The Journal of Urology ◽

10.1097/ju.0000000000000217 ◽

2019 ◽

Vol 201 (6) ◽

pp. 1041-1042

Author(s):

Douglas A. Canning

Keyword(s):

3D Printing ◽

3D Reconstruction ◽

Cloacal Malformations

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A Method of Point Cloud Stitching Based on the Mechanical Arm and Laser

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.988.467 ◽

2014 ◽

Vol 988 ◽

pp. 467-470

Author(s):

Liang Liu ◽

Shu Guang Dai

Keyword(s):

3D Printing ◽

3D Reconstruction ◽

Coordinate System ◽

Point Cloud ◽

Three Dimensional ◽

Good Effect ◽

Point Cloud Data ◽

Cloud Data

3D reconstruction as the basis of many applications,such as 3D printing, has become more and more importantfor many enterprises and researchersThe very important step in 3D reconstruction is the joining together of point cloud.This paper introduces the structures of a system to obtain three-dimensional point cloud data and a kind ofmethodsusing of the system to get point cloud data through the rotation and translation of the coordinate system, joining together the point cloud data.Experiment shows that this method has achieved good effect.

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Simultaneous improvements of strength and toughness in topologically interlocked ceramics

Proceedings of the National Academy of Sciences ◽

10.1073/pnas.1807272115 ◽

2018 ◽

Vol 115 (37) ◽

pp. 9128-9133 ◽

Cited By ~ 27

Author(s):

Mohammad Mirkhalaf ◽

Tao Zhou ◽

Francois Barthelat

Keyword(s):

3D Printing ◽

3D Reconstruction ◽

Structural Properties ◽

Upper Bound ◽

Building Blocks ◽

Image Correlation ◽

Multifunctional Materials ◽

Architectured Materials ◽

Strength And Toughness

Topologically interlocked materials (TIMs) are an emerging class of architectured materials based on stiff building blocks of well-controlled geometries which can slide, rotate, or interlock collectively providing a wealth of tunable mechanisms, precise structural properties, and functionalities. TIMs are typically 10 times more impact resistant than their monolithic form, but this improvement usually comes at the expense of strength. Here we used 3D printing and replica casting to explore 15 designs of architectured ceramic panels based on platonic shapes and their truncated versions. We tested the panels in quasi-static and impact conditions with stereoimaging, image correlation, and 3D reconstruction to monitor the displacements and rotations of individual blocks. We report a design based on octahedral blocks which is not only tougher (50×) but also stronger (1.2×) than monolithic plates of the same material. This result suggests that there is no upper bound for strength and toughness in TIMs, unveiling their tremendous potential as structural and multifunctional materials. Based on our experiments, we propose a nondimensional “interlocking parameter” which could guide the exploration of future architectured systems.

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Did shell-crushing predators drive the evolution of ammonoid septal shape?

Paleobiology ◽

10.1017/pab.2021.13 ◽

2021 ◽

pp. 1-14

Author(s):

Erynn H. Johnson ◽

Briana M. DiMarco ◽

David J. Peterman ◽

Aja M. Carter ◽

Warren D. Allmon

Keyword(s):

3D Printing ◽

3D Reconstruction ◽

Fossil Record ◽

Computer Aided Design ◽

Computer Aided ◽

Functional Explanations ◽

Aided Design ◽

Compression Resistance

Abstract For centuries, paleontologists have sought functional explanations for the uniquely complex internal walls (septa) of ammonoids, extinct shelled cephalopods. Ammonoid septa developed increasingly complex fractal margins, unlike any modern shell morphologies, throughout more than 300 million years of evolution. Some have suggested these morphologies provided increased resistance to shell-crushing predators. We perform the first physical compression experiments on model ammonoid septa using controlled, theoretical morphologies generated by computer-aided design and 3D printing. These biomechanical experiments reveal that increasing complexity of septal margins does not increase compression resistance. Our results raise the question of whether the evolution of septal shape may be tied closely to the placement of the siphuncle foramen (anatomic septal hole). Our tests demonstrate weakness in the centers of uniformly thick septa, supporting work suggesting reinforcement by shell thickening at the center of septa. These experiments highlight the importance of 3D reconstruction using idealized theoretical morphologies that permit the testing of long-held hypotheses of functional evolutionary drivers by recreating extinct morphologies once rendered physically untestable by the fossil record.

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From digital world to real life: a robotic approach to the esophagogastric junction with a 3D printed model

BMC Surgery ◽

10.1186/s12893-019-0621-6 ◽

2019 ◽

Vol 19 (1) ◽

Author(s):

Luigi Marano ◽

Alessandro Ricci ◽

Vinno Savelli ◽

Luigi Verre ◽

Luca Di Renzo ◽

...

Keyword(s):

3D Printing ◽

Thoracic Aorta ◽

Gastrointestinal Surgery ◽

Real Life ◽

Published Data ◽

Good Representation ◽

Clinical Report ◽

Clinical Effects ◽

Printing Technology ◽

3D Printed

Abstract Background Three-dimensional (3D) printing may represent a useful tool to provide, in surgery, a good representation of surgical scenario before surgery, particularly in complex cases. Recently, such a technology has been utilized to plan operative interventions in spinal, neuronal, and cardiac surgeries, but few data are available in the literature about their role in the upper gastrointestinal surgery. The feasibility of this technology has been described in a single case of gastroesophageal reflux disease with complex anatomy due to a markedly tortuous descending aorta. Methods A 65-year-old Caucasian woman was referred to our Department complaining heartburn and pyrosis. A chest computed tomography evidenced a tortuous thoracic aorta and consequent compression of the esophagus between the vessel and left atrium. A “dysphagia aortica” has been diagnosed. Thus, surgical treatment of anti-reflux surgery with separation of the distal esophagus from the aorta was planned. To define the strict relationship between the esophagus and the mediastinal organs, a life-size 3D printed model of the esophagus including the proximal stomach, the thoracic aorta and diaphragmatic crus, based on the patient’s CT scan, was manufactured. Results The robotic procedure was performed with the da Vinci Surgical System and lasted 175 min. The surgeons had navigational guidance during the procedure since they could consult the 3D electronically superimposed processed images, in a “picture-in-picture” mode, over the surgical field displayed on the monitor as well as on the robotic headset. There was no injury to the surrounding organs and, most importantly, the patient had an uncomplicated postoperative course. Conclusions The present clinical report highlights the feasibility, utility and clinical effects of 3D printing technology for preoperative planning and intraoperative guidance in surgery, including the esophagogastric field. However, the lack of published data requires more evidence to assess the effectiveness and safety of this novel surgical-applied printing technology.

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KUÉLAP VIRTUAL: VIRTUALIZACIÓN DE UNA CIUDADELA PREINCA EN LOS ANDES AMAZÓNICOS DEL PERÚ MEDIANTE FOTOGRAFÍA ESFÉRICA, MODELADO 3D E IMPRESIÓN 3D

Proceedings of the ARQUEOLÓGICA 2.0 8th International Congress on Archaeology, Computer Graphics, Cultural Heritage and Innovation ◽

10.4995/arqueologica8.2016.3567 ◽

2016 ◽

Author(s):

Esteve Ribera Torró

Keyword(s):

3D Printing ◽

3D Reconstruction ◽

International Cooperation ◽

Digital Model ◽

Topographic Data ◽

Street View ◽

Engineering Projects ◽

3D Digital Model

Between 2010 and 2012, under the International Cooperation for Development, a virtual archeology project was realized in Amazonian Andes of Peru. The project was carried out with collaboration from Universitat Politécnica de València (UPV) and the Agencia Española de Cooperación Internacional al Desarrollo (AECID), with archeologists taking part in Proyecto Especial Kuélap (PEK). The goal was to create a virtualization of Kuélap, an important monumental citadel constructed by the ancient Chachapoya society. The fruits of the project was the website “kuelapvirtual.com", that offers an interactive virtual visit (like street view) as well as geographical and archaeological information of interest. Furthermore, a virtual 3D reconstruction was created from blueprints, topographic data available and assistance from archaeologists. The 3d digital model made the fabrication of a two prototipes: an archaeological model in scale 1:750 and a topographical model in scale 1:17500, obtained through 3D printing at the Department of Engineering Projects at Universitat Politècnica de València.

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