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https://www.readbyqxmd.com/read/29771086/-design-of-cross-sectional-anatomical-model-focused-on-drainage-pathways-of-paranasal-sinuses
#1
Y Zha, W Lv, Y L Gao, Z Z Zhu, Z Q Gao
Objective: To design and produce cross-sectional anatomical models of paranasal sinuses for the purpose of demonstrating drainage pathways of each nasal sinus for the young doctors. Method: We reconstructed the three-dimensional model of sinuses area based on CT scan data, and divided it into 5 thick cross-sectional anatomy models by 4 coronal plane,which cross middle points of agger nasi cell, ethmoid bulla, posterior ethmoid sinuses and sphenoid sinus respectively. Then a 3D printerwas used to make anatomical cross-sectional anatomical models...
May 2018: Journal of Clinical Otorhinolaryngology, Head, and Neck Surgery
https://www.readbyqxmd.com/read/29768115/three-dimensional-printing-of-vitrification-loop-prototypes-for-aquatic-species
#2
Nolan J Tiersch, William M Childress, Terrence R Tiersch
Vitrification is a method of cryopreservation that freezes samples rapidly, while forming an amorphous solid ("glass"), typically in small (μL) volumes. The goal of this project was to create, by three-dimensional (3D) printing, open vitrification devices based on an elliptical loop that could be efficiently used and stored. Vitrification efforts can benefit from the application of 3D printing, and to begin integration of this technology, we addressed four main variables: thermoplastic filament type, loop length, loop height, and method of loading...
May 16, 2018: Zebrafish
https://www.readbyqxmd.com/read/29751516/engineering-a-3d-bioprinted-model-of-human-heart-valve-disease-using-nanoindentation-based-biomechanics
#3
Dewy C van der Valk, Casper F T van der Ven, Mark C Blaser, Joshua M Grolman, Pin-Jou Wu, Owen S Fenton, Lang H Lee, Mark W Tibbitt, Jason L Andresen, Jennifer R Wen, Anna H Ha, Fabrizio Buffolo, Alain van Mil, Carlijn V C Bouten, Simon C Body, David J Mooney, Joost P G Sluijter, Masanori Aikawa, Jesper Hjortnaes, Robert Langer, Elena Aikawa
In calcific aortic valve disease (CAVD), microcalcifications originating from nanoscale calcifying vesicles disrupt the aortic valve (AV) leaflets, which consist of three (biomechanically) distinct layers: the fibrosa, spongiosa, and ventricularis. CAVD has no pharmacotherapy and lacks in vitro models as a result of complex valvular biomechanical features surrounding resident mechanosensitive valvular interstitial cells (VICs). We measured layer-specific mechanical properties of the human AV and engineered a three-dimensional (3D)-bioprinted CAVD model that recapitulates leaflet layer biomechanics for the first time...
May 3, 2018: Nanomaterials
https://www.readbyqxmd.com/read/29747636/a-novel-method-for-periapical-microsurgery-with-the-aid-of-3d-technology-a-case-report
#4
Shangzhu Ye, Shiyong Zhao, Weidong Wang, Qianzhou Jiang, Xuechao Yang
BACKGROUND: Three-dimensional (3D) technology has gained wide acceptance in dentistry. It has been used for treatment planning and surgical guidance. This case report presented a novel treatment approach to remove cortical bone and root-end during periapical surgery with the help of Cone-Beam Computed Tomography (CBCT), Computer Aided Design (CAD) and three-dimensional (3D) printing technology. CASE PRESENTATION: A 37-year-old female patient presented with a large periapical lesion of left maxillary lateral incisor and canine was referred for microsurgical endodontic surgery...
May 10, 2018: BMC Oral Health
https://www.readbyqxmd.com/read/29724554/complete-arch-accuracy-of-intraoral-scanners
#5
Joshua C Treesh, Peter C Liacouras, Robert M Taft, Daniel I Brooks, Sorana Raiciulescu, Daniel O Ellert, Gerald T Grant, Ling Ye
STATEMENT OF PROBLEM: Intraoral scanners have shown varied results in complete-arch applications. PURPOSE: The purpose of this in vitro study was to evaluate the complete-arch accuracy of 4 intraoral scanners based on trueness and precision measurements compared with a known reference (trueness) and with each other (precision). MATERIAL AND METHODS: Four intraoral scanners were evaluated: CEREC Bluecam, CEREC Omnicam, TRIOS Color, and Carestream CS 3500...
April 30, 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29716816/patient-specific-pre-contouring-of-osteosynthesis-plates-for-mandibular-reconstruction-using-a-three-dimensional-key-printed-solution
#6
J Kraeima, H H Glas, M J H Witjes, K P Schepman
PURPOSE: In mandibular reconstructive surgery, the osteosynthesis plates require contouring according to the patients' individual anatomical situation. These plates are frequently contoured around a three-dimensional (3D) printed model. However, the translation to the actual patient can introduce inaccuracies and unwanted rotations in the condyles and mandibular ramus, due to malpositioning of the pre-contoured plate. MATERIALS AND METHODS: This article describes an easy-access method for exact translation of the pre-contoured plate to the patient's mandible...
April 6, 2018: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/29707462/three-dimensional-printed-surgical-simulator-for-kirschner-wire-placement-in-hand-fractures
#7
Michal Brichacek, Julian Diaz-Abele, Sarah Shiga, Christian Petropolis
Closed reduction and percutaneous pinning (CRPP) of hand fractures can be a deceptively challenging procedure that requires significant hands-on time to teach and learn. We created a realistic three-dimensional simulator that can be used for teaching junior residents the CRPP. Computer-aided design and computer-aided manufacturing (CAD/CAM) software was used to create a three-dimensional hand model incorporating several common hand fractures: Bennett's fracture, transverse fifth metacarpal neck, and transverse second proximal phalanx...
March 2018: Plastic and Reconstructive Surgery. Global Open
https://www.readbyqxmd.com/read/29693206/3d-printed-model-improves-clinical-assessment-of-surgeons-on-anatomy
#8
Bin Zheng, Xiaolin Wang, Yixiong Zheng, Jiexiong Feng
Performing surgical procedures often requires a surgeon to develop a skill to create 3-dimensional (3D) mental model on patient's anatomy. Question remains whether the touching on the 3D printed model can facilitate learning of patient anatomy than viewing the rendered virtual on-screen model. The printed and the virtual 3D model were developed from CT films taken from a 4-year-old girl, who had dysplasia of the hip in the left hip. Eleven subjects were called to report measures on six key anatomical features on the hips...
April 24, 2018: Journal of Robotic Surgery
https://www.readbyqxmd.com/read/29685857/three-dimensional-printing-as-a-technology-supporting-the-treatment-of-lower-limb-deformity-and-shortening-with-the-ilizarov-method
#9
Piotr Morasiewicz, Karolina Burzyńska, Wiktor Orzechowski, Szymon Łukasz Dragan, Szymon Feliks Dragan, Jarosław Filipiak
BACKGROUND: Treatment of multiplanar deformities, especially in younger children, requires construction of a complex Ilizarov fixator, frequently with small dimensions. The aim of this study is to verify clinical application of a3D-printed bone model in treatment with the Ilizarov method. METHODS: The study involved a 6-year-old child in whom clinical and radiological examination revealed multiplanar deformity of the right leg. Then, 3D models of individual bones were printed by means of additive manufacturing and were used as a scaffold to install the Ilizarov apparatus...
April 20, 2018: Medical Engineering & Physics
https://www.readbyqxmd.com/read/29677217/optimisation-of-three-dimensional-lower-jaw-resection-margin-planning-using-a-novel-black-bone-magnetic-resonance-imaging-protocol
#10
Astrid M Hoving, Joep Kraeima, Rutger H Schepers, Hildebrand Dijkstra, Jan Hendrik Potze, Bart Dorgelo, Max J H Witjes
BACKGROUND: MRI is the optimal method for sensitive detection of tumour tissue and pre-operative staging in oral cancer. When jawbone resections are necessary, the current standard of care for oral tumour surgery in our hospital is 3D virtual planning from CT data. 3D printed jawbone cutting guides are designed from the CT data. The tumour margins are difficult to visualise on CT, whereas they are clearly visible on MRI scans. The aim of this study was to change the conventional CT-based workflow by developing a method for 3D MRI-based lower jaw models...
2018: PloS One
https://www.readbyqxmd.com/read/29674026/silver-nanoparticles-embedded-nanopaper-as-a-colorimetric-chiral-sensing-platform
#11
Erhan Zor
Paper-based sensors open new avenue to produce simple, rapid, inexpensive and single-use analytical devices for a wide application fields involving medical diagnosis, food analysis and environmental monitoring. In this study, a new optical sensing platform for enantioselective recognition of chiral analytes was introduced by using in-situ synthesized silver nanoparticles-embedded transparent nanopaper. To this aim, nanopaper was obtained by environment-friendly approach using bacterial cellulose made of nanofibers and silver nanoparticles were embedded within nanopaper by an in-situ generation method...
July 1, 2018: Talanta
https://www.readbyqxmd.com/read/29668079/co-culture-of-adipose-derived-stem-cells-and-chondrocytes-on-three-dimensionally-printed-bioscaffolds-for-craniofacial-cartilage-engineering
#12
Robert J Morrison, Hassan B Nasser, Khaled N Kashlan, David A Zopf, Derek J Milner, Colleen L Flanangan, Matthew B Wheeler, Glenn E Green, Scott J Hollister
OBJECTIVES/HYPOTHESIS: Reconstruction of craniofacial cartilagenous defects are among the most challenging surgical procedures in facial plastic surgery. Bioengineered craniofacial cartilage holds immense potential to surpass current reconstructive options, but limitations to clinical translation exist. We endeavored to determine the viability of utilizing adipose-derived stem cell-chondrocyte co-culture and three-dimensional (3D) printing to produce 3D bioscaffolds for cartilage tissue engineering...
April 18, 2018: Laryngoscope
https://www.readbyqxmd.com/read/29665284/dual-functionalization-device-for-therapy-through-dopamine-release-and-monitoring
#13
Georgina Fabregat, Alessia Giménez, Angélica Díaz, Jordi Puiggalí, Carlos Alemán
A dual-functional device is fabricated to release progressively dopamine (DA) from a biohydrogel under real-time monitoring via electrochemical detection. For this purpose, a poly-γ-glutamic acid biohydrogel is assembled with a poly(3,4-ethylenedioxythiophene) (PEDOT) layer, previously deposited onto a screen printed electrode. The biohydrogel is formulated to achieve dimensional stability and maximum DA-loading capacity. Conditions for DA-loading are influenced by the oxidation of the neurotransmitter in acid environments and the poor resistance of PEDOT to the lyophilization...
April 17, 2018: Macromolecular Bioscience
https://www.readbyqxmd.com/read/29662792/quantitative-determination-of-residual-1-4-dioxane-in-three-dimensional-printed-bone-scaffold
#14
Ling Li, Jing Long, Long Li, Huijuan Cao, Tingting Tang, Xinghua Xi, Ling Qin, Yuxiao Lai, Xinluan Wang
Background/Objective: A novel porous scaffold poly (lactide- co -glycolide) and tricalcium phosphate (PLGA/TCP) was developed by three-dimensional printing technology for bone defect repair. As a Class 2 solvent with less severe toxicity, content of residual 1,4-dioxane in this newly developed scaffold should be rigorously controlled when it is translated to clinical use. In this study, a headspace gas chromatography-mass spectrometric (HS-GC-MS) method and related testing protocol were developed for quantitative determination of 1,4-dioxane in the PLGA/TCP composite scaffolds...
April 2018: Journal of Orthopaedic Translation
https://www.readbyqxmd.com/read/29660055/accuracy-assessment-of-pedicle-and-lateral-mass-screw-insertion-assisted-by-customized-3d-printed-drill-guides-a-human-cadaver-study
#15
Peter A J Pijpker, Joep Kraeima, Max J H Witjes, D L Marinus Oterdoom, Maarten H Coppes, Rob J M Groen, Jos M A Kuijlen
BACKGROUND: Accurate cervical screw insertion is of paramount importance considering the risk of damage to adjacent vital structures. Recent research in 3-dimensional (3D) technology describes the advantage of patient-specific drill guides for accurate screw positioning, but consensus about the optimal guide design and the accuracy is lacking. OBJECTIVE: To find the optimal design and to evaluate the accuracy of individualized 3D-printed drill guides for lateral mass and pedicle screw placement in the cervical and upper thoracic spine...
April 5, 2018: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/29607159/application-of-3d-printing-in-the-surgical-planning-of-hypertrophic-obstructive-cardiomyopathy-and-physician-patient-communication-a-preliminary-study
#16
Hong-Chang Guo, Yang Wang, Jiang Dai, Chang-Wei Ren, Jin-Hua Li, Yong-Qiang Lai
Background: The aim of this study was to evaluate the effect of 3-dimensional (3D) printing in treatment of hypertrophic obstructive cardiomyopathy (HOCM) and its roles in doctor-patient communication. Methods: 3D-printed models were constructed preoperatively and postoperatively in seven HOCM patients received surgical treatment. Based on multi-slice computed tomography (CT) images, regions of disorder were segmented using the Mimics 19.0 software (Materialise, Leuven, Belgium)...
February 2018: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/29605276/3-dimensional-printing-guide-template-assisted-percutaneous-vertebroplasty-technical-note
#17
Jian Li, JiSheng Lin, Yong Yang, JunChuan Xu, Qi Fei
Percutaneous vertebroplasty (PVP) is currently considered as an effective treatment for pain caused by acute osteoporotic vertebral compression fracture. Recently, puncture-related complications are increasingly reported. It's important to find a precise technique to reduce the puncture-related complications. We report a case and discussed the novel surgical technique with step-by-step operating procedures, to introduce the precise PVP assisted by a 3-dimensional printing guide template. Based on the preoperative CT scan and infrared scan data, a well-designed individual guide template could be established in a 3-dimensional reconstruction software and printed out by a 3-dimensional printer...
March 28, 2018: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/29602970/more-accurate-correction-can-be-obtained-using-a-three-dimensional-printed-model-in-open-wedge-high-tibial-osteotomy
#18
Hee-June Kim, Jaeyeong Park, Ji-Yeon Shin, Il-Hyung Park, Kyeong-Hyeon Park, Hee-Soo Kyung
PURPOSE: The purpose of this study was to compare the accuracy of the preoperative planning method using a three-dimensional (3D) printed model with that of a method using picture archiving and communication system (PACS) images in high tibial osteotomy (HTO). METHODS: Patients who underwent HTO using a 3D printed model (20 patients) and a method based on PACS images (20 patients) from 2012 to 2016 were compared. After obtaining the correction angle, in the 3D printed method, the wedge-shaped 3D printed model was designed...
March 30, 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29600667/-application-of-three-dimensional-printing-technology-to-design-individual-angle-section-on-chevron-of-hallux-valgus-osteotomy
#19
Yu-Hang Zhang, Da-Wei Bi, Yi-Min Chen, Gang Zu, Hai-Tao Ma
OBJECTIVE: To explore clinical application of three-dimensional printing technology to design individual angle section on Chevron of hallux valgus osteotomy. METHODS: From May 2013 to May 2016, 47 patients(66 feet) with mild to moderate hallux valgus treated by Chevron osteotomy according to different preoperative design were divided into computer osteotomy group(group A) and traditional osteotomy group(group B). In group A, there were 25 patients (33 feet), including 4 males(5 feet) and 21 females(28 feet) with an average age of (47...
March 25, 2018: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/29576649/error-analysis-how-precise-is-fused-deposition-modeling-in-fabrication-of-bone-models-in-comparison-to-the-parent-bones
#20
M V Reddy, Krishnakiran Eachempati, A V Gurava Reddy, Aakash Mugalur
Background: Rapid prototyping (RP) is used widely in dental and faciomaxillary surgery with anecdotal uses in orthopedics. The purview of RP in orthopedics is vast. However, there is no error analysis reported in the literature on bone models generated using office-based RP. This study evaluates the accuracy of fused deposition modeling (FDM) using standard tessellation language (STL) files and errors generated during the fabrication of bone models. Materials and Methods: Nine dry bones were selected and were computed tomography (CT) scanned...
March 2018: Indian Journal of Orthopaedics
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