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

. 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

142. Value of 3D printing for the comprehension of surgical anatomy. (PubMed)

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

143. 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

144. Preoperative planning and tracheal stent design in thoracic surgery: a primer for the 2017 Radiological Society of North America (RSNA) hands-on course in 3D printing (PubMed)

superior sulcus tumor. Furthermore, patient-specific device creation is demonstrated using dedicated computer-aided design software. Relevant anatomy for these tasks is obtained from CT Digital Imaging and Communications in Medicine images, leading to the generation of 3D printable files and delivery of these files to a 3D printer. (...) Preoperative planning and tracheal stent design in thoracic surgery: a primer for the 2017 Radiological Society of North America (RSNA) hands-on course in 3D printing In this work, we provide specific clinical examples to demonstrate basic practical techniques involved in image segmentation, computer-aided design, and 3D printing. A step-by-step approach using United States Food and Drug Administration cleared software is provided to enhance surgical intervention in a patient with a complex

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2017 3D Printing in Medicine

145. 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

146. Patient Specific Template Guided Pedicle Instrumentation Versus Free Hand Technique

the entry points as well as the direction of the screw. Also, replicas of the individual vertebra are produced in the 3D printer. The patients are operated in a prone position via a dorsal approach. After preparation of the dorsal process, vertebral arches and vertebral joints as well as the transverse process, the screws are implanted with one of the following methods depending on the randomization: Freehand (fluoroscopically controlled) MySpine System Postoperatively, all patients undergo computed (...) system than by the conventional free-hand method using intraoperative fluoroscopy. Condition or disease Intervention/treatment Phase Spinal Cord Diseases Procedure: spondylodesis Procedure: CT Not Applicable Detailed Description: Patients with an indication for spondylodesis are included according to the inclusion criteria and exclusion criteria. Subsequently, randomization into the MySpine and conventional group is performed. Patients remain blinded to the randomization. On the basis of a computed

2017 Clinical Trials

147. 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

148. iGEM blogs: Making Life in Space Easier by CosmoCrops

before launching, simply just the co-culture, spores of B. subtilis and a 3D printer – then everything else can be made out in space. It will also be used for future settlements on other planets, so they are not dependent on Earth for materials, but can produce what they need by themselves. Thereby, making the lives of new settlers easier than it otherwise would be. The CosmoCrops CosmoCrops is an interdisciplinary team from University of Copenhagen that consists of 10 undergraduate and graduate (...) . Physics Andrea Cordes – Stud. BSc. Computer Sciences Nikolaj Kristensen – Stud. BSc. Molecular Biomedicine Joachim Larsen – Stud. MSc. Biology-Biotechnology Iris Madsen – Stud. BSc. Mathematics Stael Naseri – Stud. BSc. Nanotechnology Thue Nikolajsen – Stud. BSc. Physics Joseph Parker – Stud. MSc. Biochemistry Giulia Perotti – Stud. MSc. Physical chemistry References Ducat D.C., Avelar-Rivas J.A., Way J.C. & Silvera P.A. (2012) Rerouting carbon flux to enhance photosynthetic productivity. Applied

2016 PLOS Blogs Network

149. Ruth Bonnington: Thoughts on the NHS from a GP

, reviewing results, fighting the crashing computer system, and dictating letters that I get to at 18h30 and still have a few phone calls still to make. Then I’m grateful for my manager and staff who have sorted out the printer, sent off our paper work and evidence to NHS England or the CCG and prepared the protocols for a CQC inspection. And I’m grateful to my husband who may have started the stir fry and is not too irritated that I’m late again or that I didn’t get home from my half day till 17h30

2016 The BMJ Blog

150. Development of three-dimensional prints of arthritic joints for supporting patients’ awareness to structural damage (PubMed)

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

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2017 Arthritis research & therapy

151. 3D Printing of Biomolecular Models for Research and Pedagogy (PubMed)

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.

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2017 Journal of visualized experiments : JoVE

152. Intraoperative Change in Defect Size during Maxillary Reconstruction Using Surgical Guides Created by CAD/CAM (PubMed)

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

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2017 Plastic and Reconstructive Surgery Global Open

153. Using a handheld stereo depth camera to overcome limited field-of-view in simulation imaging for radiation therapy treatment planning (PubMed)

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

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2017 Medical physics

154. Early experiences of planning stereotactic radiosurgery using 3D printed models of eyes with uveal melanomas (PubMed)

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

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2017 Clinical ophthalmology (Auckland, N.Z.)

155. Cost-effective, personalized, 3D-printed liver model for preoperative planning before laparoscopic liver hemihepatectomy for colorectal cancer metastases (PubMed)

. 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

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2017 International journal of computer assisted radiology and surgery

156. 3D-printed phantom study for investigating stent abutment during gastroduodenal stent placement for gastric outlet obstruction (PubMed)

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

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2017 3D Printing in Medicine

157. Craniofacial Reconstruction by a Cost-Efficient Template-Based Process Using 3D Printing (PubMed)

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

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2017 Plastic and Reconstructive Surgery Global Open

158. How to run user testing, and what we learned from doing it on OpenPrescribing

team user research session. Exciting! 2. Get a team, and a room You’ll need: a quiet room, a phone line, wifi lots of wall space a whiteboard a printer, blu-tack, post-it notes in different colours, and pens. Next, you want someone with user research skills to run the sessions, and your team. Our sessions were led by the brilliant consultant : also on the team were me (tech lead), (community manager) and (developer). This might seem like a lot of people – and it was (probably too many when we (...) any questions for us! Also, it’s good to reassure the user at the start that you’re testing your design, not their computer skills! 6. Test, test, test Soon was time for the first session. It’s best to ask to record the call, or take detailed notes – that is so you can share raw observations, and refer back to exactly what the user said. We started with Henry running the calls, then switched roles. I found running the calls the hardest part! Here are some tips that Henry gave us: if the user goes

2016 CEBM blog

159. A low-cost surgical application of additive fabrication. (PubMed)

with computer software, translating the medical imaging data sets into useful 3D geometry files in stereo lithography format for 3D printing. A commercial third party was used to print the 3D models in laser sintered nylon, which provided access to expensive, industrial-grade, high-resolution 3-D printers at a low cost.Multiple patient-specific preoperative 3D physical models were printed of portal and hepatic venous anatomy at a cost of less than $100 per model.Current 3D printing techniques can be used (...) A low-cost surgical application of additive fabrication. This study was used to test the feasibility of using additive fabrication techniques 3-dimensional (3D) printing to create personalized/patient-specific hepatic 3D physical models from clinical radiology studies for surgical resident education.Patient-specific imaging data from either computed tomography or magnetic resonance imaging scans, in Digital Imaging and Communications in Medicine format, were rendered and manipulated

2017 Journal of Surgical Education

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