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https://www.readbyqxmd.com/read/28538573/pursuing-mirror-image-reconstruction-in-unilateral-microtia-customizing-auricular-framework-by-application-of-three-dimensional-imaging-and-three-dimensional-printing
#1
Hsin-Yu Chen, Li-Shia Ng, Chun-Shin Chang, Ting-Chen Lu, Ning-Hung Chen, Zung-Chung Chen
BACKGROUND: Advances in three-dimensional imaging and three-dimensional printing technology have expanded the frontier of presurgical design for microtia reconstruction from two-dimensional curved lines to three-dimensional perspectives. This study presents an algorithm for combining three-dimensional surface imaging, computer-assisted design, and three-dimensional printing to create patient-specific auricular frameworks in unilateral microtia reconstruction. METHODS: Between January of 2015 and January of 2016, six patients with unilateral microtia were enrolled...
June 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28534721/evaluation-of-3d-additively-manufactured-canine-brain-models-for-teaching-veterinary-neuroanatomy
#2
Regina M Schoenfeld-Tacher, Timothy J Horn, Tyler A Scheviak, Kenneth D Royal, Lola C Hudson
Physical specimens are essential to the teaching of veterinary anatomy. While fresh and fixed cadavers have long been the medium of choice, plastinated specimens have gained widespread acceptance as adjuncts to dissection materials. Even though the plastination process increases the durability of specimens, these are still derived from animal tissues and they require periodic replacement if used by students on a regular basis. This study investigated the use of three-dimensional additively manufactured (3D AM) models (colloquially referred to as 3D-printed models) of the canine brain as a replacement for plastinated or formalin-fixed brains...
May 23, 2017: Journal of Veterinary Medical Education
https://www.readbyqxmd.com/read/28534614/functional-nanoclay-suspension-for-printing-then-solidification-of-liquid-materials
#3
Yifei Jin, Ashley M Compaan, Wenxuan Chai, Yong Huang
Additive manufacturing (AM) enables the freeform fabrication of complex structures from various build materials. The objective of this study is to develop a novel Laponite nanoclay-enabled "printing-then-solidification" additive manufacturing approach to extrude complex three-dimensional (3D) structures made of various liquid build materials. Laponite, a member of the smectite mineral family, is investigated to serve as a yield-stress support bath material for the extrusion printing of liquid build materials...
May 23, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28530492/3d-printing-in-liver-surgery-a-systematic-review
#4
Jan Sylwester Witowski, Jasamine Coles-Black, Tomasz Zbigniew Zuzak, Michał Pędziwiatr, Jason Chuen, Piotr Major, Andrzej Budzyński
BACKGROUND: Rapid growth of three-dimensional (3D) printing in recent years has led to new applications of this technology across all medical fields. This review article presents a broad range of examples on how 3D printing is facilitating liver surgery, including models for preoperative planning, education, and simulation. MATERIALS AND METHODS: We have performed an extensive search of the medical databases Ovid/MEDLINE and PubMed/EMBASE and screened articles fitting the scope of review, following previously established exclusion criteria...
May 22, 2017: Telemedicine Journal and E-health: the Official Journal of the American Telemedicine Association
https://www.readbyqxmd.com/read/28529664/patient-specific-3d-models-aid-planning-for-triplane-proximal-femoral-osteotomy-in-slipped-capital-femoral-epiphysis
#5
L Cherkasskiy, J P Caffrey, A F Szewczyk, E Cory, J D Bomar, C L Farnsworth, M Jeffords, D R Wenger, R L Sah, V V Upasani
PURPOSE: Slipped capital femoral epiphysis (SCFE) can result in a complex three-dimensional (3D) deformity of the proximal femur. A three-plane proximal femoral osteotomy (TPFO) has been described to improve hip mechanics. The purpose of this study was to evaluate the benefits of using 3D print technology to aid in surgical planning. PATIENTS AND METHODS: Fifteen children treated with TPFO for symptomatic proximal femoral deformity due to SCFE were included in this study...
April 2017: Journal of Children's Orthopaedics
https://www.readbyqxmd.com/read/28523082/three-dimensional-printing-custom-made-implants-for-craniomaxillofacial-reconstructive-surgery
#6
REVIEW
Mariana Matias, Horácio Zenha, Horácio Costa
Craniomaxillofacial reconstructive surgery is a challenging field. First it aims to restore primary functions and second to preserve craniofacial anatomical features like symmetry and harmony. Three-dimensional (3D) printed biomodels have been widely adopted in medical fields by providing tactile feedback and a superior appreciation of visuospatial relationship between anatomical structures. Craniomaxillofacial reconstructive surgery was one of the first areas to implement 3D printing technology in their practice...
June 2017: Craniomaxillofacial Trauma & Reconstruction
https://www.readbyqxmd.com/read/28520846/patient-specific-augmentation-rhinoplasty-using-a-three-dimensional-simulation-program-and-three-dimensional-printing
#7
Yim Don Choi, Youngjun Kim, EunSoo Park
Background: The convergence of three-dimensional (3D) simulation, tissue engineering, and 3D printing technology is creating a paradigm shift in plastic surgery. In augmentation rhinoplasty, determining the ideal material and design method has been a critical issue for many years. Thus, these technologies are expected to make important contributions to augmentation rhinoplasty. Objectives: We sought to validate the feasibility of the 3D carving simulation and patient-specific implant fabrication system (3D carving system) in a clinical trial using reproducibility tests...
May 17, 2017: Aesthetic Surgery Journal
https://www.readbyqxmd.com/read/28520334/kidney-anatomy-three-dimensional-3d-printed-pelvicalyceal-system-models-of-the-collector-system-improve-the-diagnosis-and-treatment-of-stone-disease
#8
EDITORIAL
Luciano A Favorito
No abstract text is available yet for this article.
May 2017: International Braz J Urol: Official Journal of the Brazilian Society of Urology
https://www.readbyqxmd.com/read/28518066/scaled-anatomical-model-creation-of-biomedical-tomographic-imaging-data-and-associated-labels-for-subsequent-sub-surface-laser-engraving-ssle-of-glass-crystals
#9
Aislinn M Betts, Matthew T McGoldrick, Christopher R Dethlefs, Justin Piotrowicz, Tony Van Avermaete, Jeff Maki, Steve Gerstler, W M Leevy
Biomedical imaging modalities like computed tomography (CT) and magnetic resonance (MR) provide excellent platforms for collecting three-dimensional data sets of patient or specimen anatomy in clinical or preclinical settings. However, the use of a virtual, on-screen display limits the ability of these tomographic images to fully convey the anatomical information embedded within. One solution is to interface a biomedical imaging data set with 3D printing technology to generate a physical replica. Here we detail a complementary method to visualize tomographic imaging data with a hand-held model: Sub Surface Laser Engraving (SSLE) of crystal glass...
April 25, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28512008/3d-printing-and-modelling-of-customized-implants-and-surgical-guides-for-non-human-primates
#10
Xing Chen, Jessy K Possel, Catherine Wacongne, Anne F van Ham, P Christiaan Klink, Pieter R Roelfsema
BACKGROUND: Primate neurobiologists use chronically implanted devices such as pedestals for head stabilization and chambers to gain access to the brain and study its activity. Such implants are skull-mounted, and made from a hard, durable material, such as titanium. NEW METHOD: Here we present a low-cost method of creating customized 3D-printed cranial implants that are tailored to the anatomy of individual animals. We performed pre-surgical computed tomography (CT) and magnetic resonance (MR) scans to generate three-dimensional (3D) models of the skull and brain...
May 13, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/28508071/self-assembled-micro-organogels-for-3d-printing-silicone-structures
#11
Christopher S O'Bryan, Tapomoy Bhattacharjee, Samuel Hart, Christopher P Kabb, Kyle D Schulze, Indrasena Chilakala, Brent S Sumerlin, W Gregory Sawyer, Thomas E Angelini
The widespread prevalence of commercial products made from microgels illustrates the immense practical value of harnessing the jamming transition; there are countless ways to use soft, solid materials that fluidize and become solid again with small variations in applied stress. The traditional routes of microgel synthesis produce materials that predominantly swell in aqueous solvents or, less often, in aggressive organic solvents, constraining ways that these exceptionally useful materials can be used. For example, aqueous microgels have been used as the foundation of three-dimensional (3D) bioprinting applications, yet the incompatibility of available microgels with nonpolar liquids, such as oils, limits their use in 3D printing with oil-based materials, such as silicone...
May 2017: Science Advances
https://www.readbyqxmd.com/read/28507143/controllable-load-sharing-for-soft-adhesive-interfaces-on-three-dimensional-surfaces
#12
Sukho Song, Dirk-Michael Drotlef, Carmel Majidi, Metin Sitti
For adhering to three-dimensional (3D) surfaces or objects, current adhesion systems are limited by a fundamental trade-off between 3D surface conformability and high adhesion strength. This limitation arises from the need for a soft, mechanically compliant interface, which enables conformability to nonflat and irregularly shaped surfaces but significantly reduces the interfacial fracture strength. In this work, we overcome this trade-off with an adhesion-based soft-gripping system that exhibits enhanced fracture strength without sacrificing conformability to nonplanar 3D surfaces...
May 15, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28502889/three-dimensional-printing-facilitates-successful-endovascular-closure-of-a-type-ii-abernethy-malformation-using-an-amplatzer-atrial-septal-occluder-device
#13
Jeffrey Forris Beecham Chick, Shilpa N Reddy, Alice C Yu, Tatiana Kelil, Ravi N Srinivasa, Kyle J Cooper, Wael E Saad
Type II Abernethy malformations, characterized by side-to-side portosystemic shunting with preserved intrahepatic portal venous system, have been treated with shunt closure surgically and endovascularly. Three-dimensional printing has been used to develop highly accurate patient-specific representations for surgical and endovascular planning and intervention. This innovation describes three-dimensional printing to successfully close a flush-oriented type II Abernethy malformation, with discrepant dimensions on computed tomography, conventional venography, and intravascular ultrasound, using a 12-mm AMPLATZER atrial septal occluder device...
May 11, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28501000/combination-of-a-biodegradable-three-dimensional-3d-printed-cage-for-mechanical-support-and-nanofibrous-membranes-for-sustainable-release-of-antimicrobial-agents-for-treating-the-femoral-metaphyseal-comminuted-fracture
#14
Ying-Chao Chou, Demei Lee, Tzu-Min Chang, Yung-Heng Hsu, Yi-Hsun Yu, Err-Cheng Chan, Shih-Jung Liu
The aim of this study was to develop a biodegradable three-dimensional-printed polylactide (PLA) cage for promoting bony fixation and an antibiotics-embedded poly(d,l)-lactide-co-glycolide (PLGA) nanofibrous membrane for infectious prophylaxis during treating the comminuted metaphyseal fracture in a rabbit femoral model. The in vitro studies included measuring the mechanical properties of the 3D printed cage and determining release activities of vancomycin and ceftazidime from the nanofibers. The in vivo study included comparisons of rabbits of the femoral metaphyseal comminuted fracture treated with or without the combined biodegradable polymers...
May 2, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28500466/a-three-dimensional-pelvic-model-made-with-a-three-dimensional-printer-applications-for-laparoscopic-surgery-to-treat-rectal-cancer
#15
A Hamabe, M Ito
To help understand the three-dimensional (3D) spatial relationships among the highly complex structures of the pelvis, we made a novel 3D pelvic model with a 3D printing system. We created two pelvic models including the muscles, vessels, nerves, and urogenital organs; the first based on the pelvic anatomy of a healthy male volunteer and the second on the pelvic anatomy of a female volunteer with rectal cancer. The models clearly demonstrated the complicated spatial relationships between anatomical structures in the pelvis...
May 12, 2017: Techniques in Coloproctology
https://www.readbyqxmd.com/read/28500106/medical-3-d-printing
#16
Bryant Furlow
Three-dimensional printing is used in the manufacturing industry, medical and pharmaceutical research, drug production, clinical medicine, and dentistry, with implications for precision and personalized medicine. This technology is advancing the development of patient-specific prosthetics, stents, splints, and fixation devices and is changing medical education, treatment decision making, and surgical planning. Diagnostic imaging modalities play a fundamental role in the creation of 3-D printed models. Although most 3-D printed objects are rigid, flexible soft-tissue-like prosthetics also can be produced...
May 2017: Radiologic Technology
https://www.readbyqxmd.com/read/28499127/3d-printed-scaffolds-with-synergistic-effect-of-hollow-pipe-structure-and-bioactive-ions-for-vascularized-bone-regeneration
#17
Wenjie Zhang, Chun Feng, Guangzheng Yang, Guanglong Li, Xun Ding, Shaoyi Wang, Yuandong Dou, Zhiyuan Zhang, Jiang Chang, Chengtie Wu, Xinquan Jiang
Segmental bone regeneration remains a considerable challenge due to the associated low degree of vascularization. To solve this problem, in this study, hollow-pipe-packed silicate bioceramic (BRT-H) scaffolds are fabricated using a coaxial three-dimensional (3D) printing technique. Based on a modified core/shell printer nozzle and a modulated viscoelastic bioceramic paste, hollow struts with an external diameter of 1 mm and internal dimeter of 500 μm can be directly printed, yielding a compressive strength of the BRT-H scaffolds as high as 26 MPa...
May 3, 2017: Biomaterials
https://www.readbyqxmd.com/read/28498291/multi-level-3d-printing-implant-for-reconstructing-cervical-spine-with-metastatic-papillary-thyroid-carcinoma
#18
Xiucan Li, Yiguo Wang, Yongfei Zhao, Jianheng Liu, Songhua Xiao, Keya Mao
STUDY DESIGN: A unique case report. OBJECTIVE: A three-dimensional (3D) printing technology is proposed for reconstructing multi-level cervical spine (C2-C4) after resection of metastatic papillary thyroid carcinoma in a middle-age female patient. SUMMARY OF BACKGROUND DATA: Papillary thyroid carcinoma is a malignant neoplasm with a relatively favorable prognosis. A metastatic lesion in multi-level cervical spine (C2-C4) destroys neurological functions and causes local instability...
May 11, 2017: Spine
https://www.readbyqxmd.com/read/28495033/clinical-applications-of-3-dimensional-printing-in-radiation-therapy
#19
Yizhou Zhao, Kathryn Moran, Mammo Yewondwossen, James Allan, Scott Clarke, Murali Rajaraman, Derek Wilke, Paul Joseph, James L Robar
Three-dimensional (3D) printing is suitable for the fabrication of complex radiotherapy bolus. Although investigated from dosimetric and feasibility standpoints, there are few reports to date of its use for actual patient treatment. This study illustrates the versatile applications of 3D printing in clinical radiation oncology through a selection of patient cases, namely, to create bolus for photon and modulated electron radiotherapy (MERT), as well as applicators for surface high-dose rate (HDR) brachytherapy...
May 8, 2017: Medical Dosimetry: Official Journal of the American Association of Medical Dosimetrists
https://www.readbyqxmd.com/read/28494012/fabrication-of-malleable-three-dimensional-printed-customized-bolus-using-three-dimensional-scanner
#20
Jae Won Park, Se An Oh, Ji Woon Yea, Min Kyu Kang
A three-dimensional (3D)-printed customized bolus (3D bolus) can be used for radiotherapy application to irregular surfaces. However, bolus fabrication based on computed tomography (CT) scans is complicated and also delivers unwanted irradiation. Consequently, we fabricated a bolus using a 3D scanner and evaluated its efficacy. The head of an Alderson Rando phantom was scanned with a 3D scanner. The 3D surface data were exported and reconstructed with Geomagic Design X software. A 3D bolus of 5-mm thickness designed to fit onto the nose was printed with the use of rubber-like printing material, and a radiotherapy plan was developed...
2017: PloS One
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