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161. Three-dimensional printing of navigational template in localization of pulmonary nodule: A pilot study. Full Text available with Trip Pro

. This study aims to investigate its feasibility in clinical application.Patients with peripheral lung nodules (<2 cm) were enrolled. Preadmission computed tomography images were downloaded and reconstructed into a 3D model. A digital model of the navigational template was designed via computer-aided design software and then exported into 3D printer to produce physical template. The precision of the template-guided nodule localization and associated complications were evaluated.A total of 16 patients were (...) acceptable accuracy for the application in lung nodule localization. The use of this navigational template could facilitate the procedure of lung nodule localization and may potentially break the dependence of percutaneous localization on computed tomography scanning.Copyright © 2017. Published by Elsevier Inc.

2017 Journal of Thoracic and Cardiovascular Surgery

162. Early experiences of planning stereotactic radiosurgery using 3D printed models of eyes with uveal melanomas Full Text available with Trip Pro

Early experiences of planning stereotactic radiosurgery using 3D printed models of eyes with uveal melanomas The objective of this study was to determine the use of 3D printed model of an eye with intraocular tumor for linear accelerator-based stereotactic radiosurgery.The software for segmentation (3D Slicer) created virtual 3D model of eye globe with tumorous mass based on tissue density from computed tomography and magnetic resonance imaging data. A virtual model was then processed (...) in the slicing software (Simplify3D®) and printed on 3D printer using fused deposition modeling technology. The material that was used for printing was polylactic acid.In 2015, stereotactic planning scheme was optimized with the help of 3D printed model of the patient's eye with intraocular tumor. In the period 2001-2015, a group of 150 patients with uveal melanoma (139 choroidal melanoma and 11 ciliary body melanoma) were treated. The median tumor volume was 0.5 cm3 (0.2-1.6 cm3). The radiation dose

2017 Clinical ophthalmology (Auckland, N.Z.)

163. Cost-effective, personalized, 3D-printed liver model for preoperative planning before laparoscopic liver hemihepatectomy for colorectal cancer metastases Full Text available with Trip Pro

. This paper presents a cost-effective technique of preparing 3D-printed liver models that preserves the shape and all of the structures, including the vessels and the tumor, which in the present case is colorectal liver metastasis.The patient's computed tomography scans were used for the separation and visualization of virtual 3D anatomical structures. Those elements were transformed into stereolithographic files and subsequently printed on a desktop 3D printer. The multipart structure was assembled (...) Cost-effective, personalized, 3D-printed liver model for preoperative planning before laparoscopic liver hemihepatectomy for colorectal cancer metastases Three-dimensional (3D) printing for preoperative planning has been intensively developed in the recent years. However, the implementation of these solutions in hospitals is still difficult due to high costs, extremely expensive industrial-grade printers, and software that is difficult to obtain and learn along with a lack of a defined process

2017 International journal of computer assisted radiology and surgery

164. Development of three-dimensional prints of arthritic joints for supporting patients’ awareness to structural damage Full Text available with Trip Pro

high-resolution peripheral quantitative computed tomography (HR-pQCT) to develop 3D prototypes of patients' finger joints.HR-pQCT (XtremeCT, Scanco) measurements were performed in healthy individuals and patients with inflammatory joint disease, followed by a 3D print using the objet30 printer. Healthy participants (n = 10), and patients (n = 15 with RA and 15 with PsA) underwent a detailed, standardized interview with demonstration of printed joints.Utilizing HR-pQCT images of metacarpophalangeal

2017 Arthritis research & therapy

165. 3D Printing of Biomolecular Models for Research and Pedagogy Full Text available with Trip Pro

3D Printing of Biomolecular Models for Research and Pedagogy The construction of physical three-dimensional (3D) models of biomolecules can uniquely contribute to the study of the structure-function relationship. 3D structures are most often perceived using the two-dimensional and exclusively visual medium of the computer screen. Converting digital 3D molecular data into real objects enables information to be perceived through an expanded range of human senses, including direct stereoscopic (...) parameters is difficult and time consuming without detailed guidance. Here, we provide a guide on the digital design and physical fabrication of biomolecule models for research and pedagogy using open source or low-cost software and low-cost 3D printers that use fused filament fabrication technology.

2017 Journal of visualized experiments : JoVE

166. Using a handheld stereo depth camera to overcome limited field-of-view in simulation imaging for radiation therapy treatment planning Full Text available with Trip Pro

Using a handheld stereo depth camera to overcome limited field-of-view in simulation imaging for radiation therapy treatment planning A correct body contour is essential for reliable treatment planning in radiation therapy. While modern medical imaging technologies provide highly accurate patient modeling, there are times when a patient's anatomy cannot be fully captured or there is a lack of easy access to computed tomography (CT) simulation. Here, we provide a practical solution (...) to merge the mesh model with the CT and fill in the missing surface information thereby obtaining a complete surface model of the subject. To evaluate the accuracy of the proposed approach, experiments were performed with the following steps. First, we selected three previously treated patients and fabricated a phantom mimicking each patient using the corresponding CT images and a 3D printer. Second, we removed part of the CT images of each patient to create hypothetical cases with image truncations

2017 Medical physics

167. Craniofacial Reconstruction by a Cost-Efficient Template-Based Process Using 3D Printing Full Text available with Trip Pro

of concept, we present a case of reconstruction of a craniofacial defect with involvement of the supraorbital rim. The following hybrid manufacturing process combines additive manufacturing with silicone molding and an intraoperative, manual fabrication process. A computer-aided design template is 3D printed from thermoplastics by a fused deposition modeling 3D printer and then silicone molded manually. After sterilization of the patient-specific mold, it is used intraoperatively to produce an implant

2017 Plastic and Reconstructive Surgery Global Open

168. 3D-printed phantom study for investigating stent abutment during gastroduodenal stent placement for gastric outlet obstruction Full Text available with Trip Pro

to design an in vitro experiment using a flexible anthropomorphic three-dimensional (3D)-printed GD phantom model.A GD phantom was fabricated using 3D printer data after performing computed tomography gastrography. A partially covered (PC) or fully covered (FC) stent was placed so that its distal end abutted onto the duodenal wall in groups PC-1 and FC-1 or its distal end was sufficiently directed caudally in groups PC-2 and FC-2. The elapsed times of the inflowing of three diets (liquid, soft

2017 3D Printing in Medicine

169. Intraoperative Change in Defect Size during Maxillary Reconstruction Using Surgical Guides Created by CAD/CAM Full Text available with Trip Pro

Intraoperative Change in Defect Size during Maxillary Reconstruction Using Surgical Guides Created by CAD/CAM Surgical osteotomy guides created by computer-aided design/computer-aided manufacturing (CAD/CAM) have been developed and are now widely used in maxillofacial reconstruction. However, there are no standard procedures for dealing with an intraoperative change in defect size. We report on a case in which we used our CAD/CAM guides to deal with an intraoperative change in defect size (...) in a maxillary reconstruction. We planned the maxillary reconstruction using a free fibula flap because of left maxillary sinus cancer in a 73-year-old man. In Japan, we cannot use commercially supplied CAD/CAM guides because these have not been approved by the government. We created novel CAD/CAM guides by using free software and a low-cost 3D printer. We performed model surgery to check the accuracy of the design and to prebend the titanium plates before the operation. The actual defect in the maxilla

2017 Plastic and Reconstructive Surgery Global Open

170. A New Spinal Brace Design Concept for the Treatment of Adolescent Idiopathic Scoliosis

which can improve brace design. However, it is still quite time consuming to construct a brace. Although 3D printing technology has been proposed to construct a scoliosis brace, its effectiveness has not been validated. The goals of this study was to investigate if an effective and comfortable brace can be designed and fabricated by using ultrasound and computer-aided design and computer-aided manufacturing (CAD/CAM) technology, and be printed directly from a 3D printer with faster production, lower (...) or less than 1 year postmenarchal. The 50 subjects will be randomly assigned to 2 equally sized groups (n=25 in each group): group A conventional designed and manual fabricated braces and group B ultrasound and CAD/CAM scanner designed brace with printing by a 3D printer. Both groups: A brace monitor (2.5cm x 4.0cm x 1.5 cm and 8g) developed from our group will be installed into all braces for both study groups. It will monitor patients' compliance which includes how much time they use their braces

2017 Clinical Trials

171. Patient Satisfaction & Retention of Milled, 3D Printed and Conventional Complete Dentures

for nesting each file for the suitable PMMA block size and height, ready for milling them in denture bases with Dental Concept DC1 . After milling denture bases, acrylic teeth will be chosen for each patient with the suitable shade and size following the inter-arch space, then glued by auto-polymerizing resin in their corresponding sockets in the milled denture bases. In second intervention: STL files will be imported to Rapidshape D30 3D-printer CAM software followed by adjusting the object (...) to be virtually placed on X,Y and Z axes on the printer plate to be ready for layering it in three dimension. Photopolymerizable PMMA liquid resin will be added in the printer and the files processed into 3D printed upper and lower denture bases. Acrylic teeth are then glued in their sockets in the printed denture bases using auto-polymerizable resin. In control group:Conventional complete denture construction by normal processing steps will be made for patients enrolled in the control group. For the three

2017 Clinical Trials

172. Craniofacial Applications of 3D Printing

, University of Maryland Study Details Study Description Go to Brief Summary: 3D printing is a technology that allows for physical creation of a 3D model (usually made of plastic) based on computer generated 3D images from CT scans. The 3D images of craniofacial skeleton using computer software are routinely generated and, in turn, these 3D images can be used to create a plastic 3D model using a 3D printer. Unstable or comminuted facial fractures need to be reduced and rigidly fixated using titanium plates (...) of treatment. The purpose of this study is to explore whether custom plastic models 3D printed at Shock Trauma Center and used for bending and shaping plates for facial fracture repair can improve results of facial fracture reconstruction. Our plastic surgery division will design and produce facial bone 3D model of patients (with facial fractures) using an in-house 3D printer, then use the 3D model to contour the hardware pre-op or intra-op at the time of fracture repair. We believe that we can achieve

2017 Clinical Trials

173. Benefits and Limitations of Entry-Level 3-Dimensional Printing of Maxillofacial Skeletal Models. Full Text available with Trip Pro

previously undergone pediatric craniofacial reconstruction with use of a commercially produced medical model for surgical planning. Each vendor model had been produced using computed tomographic imaging data. With the use of this same data source, in-house models were printed in polylactic acid using a commercially available printer. Data were collected from November 1 to December 30, 2015.Models created from these 2 methods of production were assessed for fidelity of surface anatomy, resilience (...) Benefits and Limitations of Entry-Level 3-Dimensional Printing of Maxillofacial Skeletal Models. A protocol for creating exceptionally low-cost 3-dimensional (3-D) maxillofacial skeletal models does not require proficiency with computer software or intensive labor. Small and less affluent centers can produce models with little loss in accuracy and clinical utility.To highlight the feasibility and methods of introducing in-house, entry-level additive manufacturing (3-D printing) technology

2017 JAMA otolaryngology-- head & neck surgery

174. Development of a Tailored Thyroid Gland Phantom for Fine-Needle Aspiration Cytology by Three-Dimensional Printing. (Abstract)

, and ultrasonographic (US) characteristics.A three-dimensional (3D) digital model of the human neck was reconstructed from computed tomography data of a subject. This model was used to create 3D-printed templates for various organs that require US visualization. The templates were injected with polymers that provided similar degrees of ultrasound permeability as the corresponding organs. For fabrication of each organ, the respective molds of organs, blood vessels, thyroid gland, and tumor were injected (...) . In the survey, all 45 participants replied that they found the phantom useful for FNAC training, and 30 medical students professed increased interest in thyroid diseases after using the phantom.We successfully fabricated a tailored thyroid gland phantom for transfixion practice. As most of the phantom parts are injected in molds fabricated using a 3D printer, they can be easily reproduced once the molds are fabricated. This phantom is expected to serve as an effective and fully tailored training model

2017 Journal of Surgical Education

175. Creating an Optimal 3D Printed Model for Temporal Bone Dissection Training. (Abstract)

Creating an Optimal 3D Printed Model for Temporal Bone Dissection Training. Making a 3-dimensional (3D) temporal bone model is simple using a plaster powder bed and an inkjet printer. However, it is difficult to reproduce air-containing spaces and precise middle ear structures. The objective of this study was to overcome these problems and create a temporal bone model that would be useful both as a training tool and for preoperative simulation.Drainage holes were made to remove excess materials (...) from air-containing spaces, ossicle ligaments were manually changed to bony structures, and small and/or soft tissue structures were colored differently while designing the 3D models. The outcomes were evaluated by 3 procedures: macroscopic and endoscopic inspection of the model, comparison of computed tomography (CT) images of the model to the original CT, and assessment of tactile sensation and reproducibility by 20 surgeons performing surgery on the model.Macroscopic and endoscopic inspection

2017 Rhinology and Laryngology

176. Circumferential Three-Dimensional-Printed Tracheal Grafts: Research Model Feasibility and Early Results. Full Text available with Trip Pro

models of porcine subject tracheas were generated using preoperative computed tomography scans. Two designs were used to test graft customizability and the limits of the construction process. Designs I and II used 270-degree and 360-degree external polycaprolactone scaffolds, respectively, both encompassing a circumferential extracellular matrix collagen layer. The polycaprolactone scaffolds were made in a fused-deposition modeling 3D printer and customized to the recipient's anatomy. Design I

2017 Annals of Thoracic Surgery

177. Accuracy of printed dental models made with 2 prototype technologies and different designs of model bases. Full Text available with Trip Pro

printers using different techniques: stereolithography and triple jetting technology (polyjet). The printed models were then scanned with a computed tomography scanner and a desktop laser scanner to create the respective digital models. Evaluation of the accuracy was done by measuring the dentitions with Ortho Analyzer software (3Shape, Copenhagen, Denmark) and by model superimposition with Geomagic Qualify software (3D Systems, Rock Hill, SC). An observer measured the distances twice, with an interval (...) of 2 weeks. The accuracy of the printed models was statistically evaluated by the mixed-effects regression model approach.The results showed that printed models made by the polyjet printer were accurate, regardless of the design of the model base. Printed models made with the stereolithography technique with the regular model base and the horseshoe-shaped base with a bar were accurate, but the transversal distances measured on the printed models with a horseshoe-shaped base were statistically

2017 American journal of orthodontics and dentofacial orthopedics

178. Value of 3D printing for the comprehension of surgical anatomy. (Abstract)

information.Fifteen patients scheduled for laparoscopic splenectomy, nephrectomy, or pancreatectomy were selected and, for each, a full-size 3D virtual anatomical object was reconstructed from a contrast-enhanced MDCT (Multiple Detector Computed Tomography) and then prototyped using a 3D printer. After having carefully evaluated-in a random sequence-conventional contrast MDCT scans, virtual 3D reconstructions on a flat monitor, and 3D-printed models of the same anatomy for each selected case, thirty subjects

2017 Surgical endoscopy

179. Microguided Endodontics: Accuracy of a Miniaturized Technique for Apically Extended Access Cavity Preparation in Anterior Teeth. (Abstract)

. Preoperative surface and cone-beam computed tomography scans were matched by using the coDiagnostix software. Virtual planning was performed for the access cavities, and templates were used for guidance. The templates were produced by a three-dimensional printer. Two operators performed the access cavities. A postoperative cone-beam computed tomography scan was superimposed on the virtual plan, and the deviation was measured in 3 dimensions and angles. Descriptive statistical analyses were performed

2017 Journal of Endodontics

180. Microsoft Windows Run Command

Utility IX. Technique: System Administration AppWiz.cpl Add or remove programs CompMgMt.msc Computer Management Control Control Panel Control AdminTools Administration Tools Control NetConnections Network Connections Control Printers Printers and Faxes HdwWiz.cpl Device Manager EventVwr.msc Event Viewer GpEdit.msc Local Group Policy Editor InetMgr Internet Information Services (IIS) MsInfo32 System Information SysDm.cpl System properties (computer name, hardware, remote and environment variables

2018 FP Notebook

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