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"Bone drilling is a common orthopedic procedure used to drill holes for screw insertion into fractured bone. " Hole quality is not limited to the drill geometry, but also on the drilling parameters, drilling equipment, and drilling method, which must be accomplished in order to successfully perform bone drilling. "Research was done to determine the appropriate material type and infill percentage for printing bone phantoms via 3D printing. ".
Source link: https://doi.org/10.1007/978-3-030-99112-8_19
"3D printing concrete has shown its ability over traditional building techniques. " This project aims to investigate the techniques of 3D concrete printing technology and the ways by which it can be improved by the development of environmentally friendly partial substitutes for Portland cement. Portland cement is the primary component in the 3D printing mixs used in 3D printing worldwide; however, although this technology is gaining traction in industrial countries, cement has drawbacks; it does not contribute significantly to the rise of CO_2 emissions for the construction process. Fly Ash, Silica Fumes, and Ground Granulated blast-furnace slag, or Water Hyacinth Ash was mixed in Proposed 3D concrete mixes. As the 3D concrete should have a set flow ability to not have extrusion or buildingability problems, it is impossible to achieve.
Source link: https://doi.org/10.1007/978-981-19-1004-3_52
"3D printing technology is also known as additive manufacturing process where the products are manufactured layer by layer. " The process parameter selected for the current study is raster angle, infill density, and layer thickness, which can be adjusted by keeping other process parameter constants constant. Three levels of values are considered for each process parameter in the literature for PETG specimens, and correlations between these process parameters were examined. From the optimized process parameter 0. 1-mm layer thickness, 90% infill density, and 60b0 raster angle, which were found to be the optimum for improved surface finish at 245 mm/s print speed. Using PETG material, the study has concentrated on a simple yet effective method for estimating surface roughness over several surfaces of FDM specimens.
Source link: https://doi.org/10.1007/978-981-16-9057-0_22
"Purpose" is a word that refers to our report of our experience with a 3D patient-specific device in an opening-wedge tibial osteotomy for the correction of varios malalignment in a patient with prior cruciate ligament reconstruction. " Previous studies have not reported the use of 3D PSI in patients with prior knee surgery. To create a simulated osteotomy and correction, the Bodycad Osteotomy software package was used. The high tibial osteotomy was performed with the aid of a 3D patient-specific surgical guide and plate. Results The arthroscopy and open portions of the surgery were performed in 65 minutes, with only three fluoroscopy shots taken intraoperatively. The patient had 125 u00b0 of flexion and minimal pain at the 6-week follow-up. Conclusion "Using three-dimensional PSI can be used effectively for the accurate and efficient correction of vain malalignment while still using pre-existing equipment, with positive short-term clinical results. ".
Source link: https://doi.org/10.1007/s00590-021-03043-8
"Purpose 3D-printing is an emerging technology with promising applications for patient-specific interventions. " Nevertheless, evidence regarding the clinical applicability of 3D-printing in otology and research on its use is sparse. Understanding these new treatment options is a prerequisite for clinical integration, which may lead to improved patient outcomes. This report explores current applications of 3D-printed patient-specific otologic therapies, including the state of the science, strengths, drawbacks, and future prospects. Conclusions Screening generated 590 papers, with 63 of them eligible and included for analysis. The majority of the studies were conducted using outer ear interventions. However, study quality was poor, as most studies failed to use reliable objective findings, compare new interventions with traditional medical therapy, and adequately describe manufacturing. Conclusion Several clinical trials using patient-specific 3D-printing in otology have been considered promising. However, it is also unknown if these interventions enhance patient outcomes due to a lack of comparison with traditional methods and low levels of evidence. ".
Source link: https://doi.org/10.1007/s00405-022-07291-0
"A low-cost flow system was developed, manufactured, and tested to perform automated base-catalyzed transesterification of triacylglycerols in edible oils to determine the fatty acid content in edible oils. Given the increased reactivity in flow, lower catalyst concentrations were required compared to traditional batch reactions, owing to the increased reactivity in flow. Comparison of results with Helianthus annuus's approved fatty acid content revealed the reliability of the automated flow method. The fatty acid composition of sunflower and other commercial edible oils, including avocado oil, canola oil, extra virgin olive oil, and a canola and olive oil blend, was determined by a mainly 3D-printed flow system. Linoleic acid was the primary component of sunflower oil, as the majority of other oils were made up mainly of oleic acid. The edible oils' fatty acid content was comparable to reported and literature values. ".
Source link: https://doi.org/10.1007/s12161-022-02233-2
"Methods A novel 3D printed simulator for examination and electrosurgical care of dysplastic areas of the cervix was compared to a conventional simulator. " With the novel simulator, Group A underwent the seminar with the conventional and Group B. The novel simulator was also evaluated by Group B with four questions. General Information Nine of the 18 questions raised statistically significant differences favoring Group B over Group B. More R0-resections and less contacts between electrosurgical loop and vagina or speculum were obtained by Group B. Without statistically significant differences, the learning curves of the published resections favoured the novel simulator of Group B. With a mean score of 1. 6 points, the four questions focusing on certain aspects of the novel simulator show a high appreciation of the students. Conclusions In comparison to the previous version, the presented novel simulator exhibits many benefits.
Source link: https://doi.org/10.1186/s41205-022-00143-x
"Here, chitosan-based solid state carbon dots with yellow fluorescence and a yield of 90% were obtained from chitosan via a one-step hydrothermal synthesis. " Meanwhile, the occurrence of fluorescence resonance energy transfer facilitates long wavelength emission of C-SS-CDs in a highly concentrated solution and solid state. The photoluminescence quantum yield of C-SS-CDs in dilute acid solution is 40%, which can be used for the determination of Fe3+ ions in acidic systems. The C-SS-CDs were mixed with epoxy resin and curing agent to produce C-SS-CDs/epoxy resin composites coated onto the 450 nm chip, resulting in a WLED with a 450 nm chip and a gray rendering index of more than 90 percent. In addition, C-SS-CDs/epoxy composites can also be printed 3D anti-counterfeiting and warning signs. Abstract Graphical Abstract Abstract: Chitosan-based solid emission carbon dots were applied to a white light-emitting diode with a color rendering index exceeding 90 and 3D printing of a 90-and-3D printing.
Source link: https://doi.org/10.1007/s42114-022-00483-6
"Surgical resection to produce tumor-free margins in patients with hepatocellular carcinoma is a challenging clinical situation for patients with hepatocellular carcinoma. " 3D printed hydrogel scaffolds were manufactured herein by incorporating one agent with multifunctionality into implantable scaffolds in order to simplify the manufacturing process for effectively limiting postoperative tumor recurrence. Notably, the CuO nanoparticles not only act as the reservoir for releasing Cu2+ to produce intracellular reactive oxygen species but also act as a photothermal agent to produce heat. In vivo, by implanting hydrogel scaffolds in the resection site, effective tumor suppression after primary resection can be achieved in vivo.
Source link: https://doi.org/10.1186/s12951-022-01454-1
"The results indicate that 3D-printed PEEK with 300-u00b5 million pore size has the highest yield compressive strength, with increasing the specimen's pore size above that would reduce the specimen's yield strength. " Moreover, FEA reported that the stress distribution in the scaffold core along the longitudinal axis under compressive load is the highest in the scaffold core, with less on the scaffold's outer shell. Finally, buckling simulation results reported that the specimens failed according to the second buckling mode with two curvatures, similar to real-time experimental findings. ".
Source link: https://doi.org/10.1007/s11837-022-05361-6
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