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"Bone drilling is a common orthopedic procedure used to drill holes for screw insertion to repair fractured bone. " Hole quality is not limited to the drill geometry, but also on the drilling methods, calculating parameters, drilling equipment, and drilling method, so skilled personnel are required to safely perform bone drilling. Our results reveal significant differences in quality among those materials and reveal that 3D printing can be used for manufacturing bone phantoms.
Source link: https://doi.org/10.1007/978-3-030-99112-8_19
"3D printing concrete has shown its ability over traditional building methods," the concrete has shown. This project aims to investigate the functionality of 3D concrete printing equipment and the ways by which it can be improved by the development of environmentally friendly partial substitutes for Portland cement. The key component in the 3D printing blends used in 3D printing worldwide is Portland cement; however, although this technology is gaining traction in developed countries, cement has drawbacks as it contributes significantly to the rise of CO_2 emissions for the building process. Fly Ash, Silica Fumes, and Ground Granulated blast-furnace slag or Water Hyacinth Ash were mixed in a Proposed 3D concrete mix by the artist. The 3D printed mixes are impossible to obtain because the concrete should have a certain flow capability to not have extrusion or buildability issues.
Source link: https://doi.org/10.1007/978-981-19-1004-3_52
"3D printing technology is also known as additive manufacturing process, where layer by layer is produced. " By holding other process parameter constants, the process parameter chosen for the current study is raster angle, infill density, and layer thickness. Three levels of values for each process parameter are considered for each process parameter, and correlations between these process parameters are investigated, which is not present in the literature for PETG specimens. The results from the investigation of Taguchi methods revealed that from the chosen process parameter, 0. 1-mm layer thickness, 90% infill density, and 60 b0 raster angle were found to be the appropriate for improved surface finish at 245 mm/s printing speed. The study is aimed at a simple yet effective method for estimating surface roughness of various surfaces of FDM specimens made from PETG material.
Source link: https://doi.org/10.1007/978-981-16-9057-0_22
"Purpose" is a word that refers to the use of a 3D patient-specific device in an opening-wedge tibial osteotomy for the correction of vain 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 perform the high tibial osteotomy, the 3D patient-specific surgical manual and plate were used. The patient had 125-u00b0 of flexion and minimal pain at the 6-week follow-up. The bone was angularized within 1. 9 billion points; the HKA angle was achieved within 0. 1 percent; and there was no change in the posterior tibial slope. Conclusion "Three-dimensional PSI can be used for the accurate and timely correction of vain malalignment while still accepting 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. " Despite this, evidence on the clinical applicability of 3D-printing in otology and research on its use is mixed, as well as research on its use is lacking. Understanding these emerging treatment options is a prerequisite for clinical implementation, which may lead to better patient outcomes. This report seeks to investigate current applications of 3D-printed patient-specific otologic therapies, including the state of the science, strengths, limitations, and future prospects. Study quality was determined using Joanna Briggs Institute's critical appraisal software, which was used to analyze study results. Outer ear interventions accounted for 73% of the studies. However, study quality was poor, as most studies struggled to use reliable objective findings, compare new interventions with conventional therapy, and adequately describe manufacturing. Several clinical trials using patient-specific 3D-printing in otology have been considered promising. However, it is also unknown if these interventions improve patient outcomes due to a lack of comparison with conventional methods and low levels of evidence. ".
Source link: https://doi.org/10.1007/s00405-022-07291-0
"To determine the fatty acid content in edible oils, a low-cost flow system was developed, manufactured, and tested. " By fine-tuning 3D-printer settings, high-quality leak-tight fittings with standard threading were manufactured in polypropylene, which reduced the overall cost of the flow system dramatically. Comparing results with Helianthus annuus's approved fatty acid content revealed the suitability of the automated flow process was determined by comparing results with Helianthus annuus's certified fatty acid content. The majority of 3D-printed flow process was used to determine the fatty acid content of sunflower and other commercial edible oils, namely avocado oil, canola oil, extra virgin olive oil, and a canola and olive oil blends. Linoleic acid was the key component in sunflower oil, whereas most other oils were mainly composed of oleic acid. The edible oils' fatty acid content was similar to tested and literature values.
Source link: https://doi.org/10.1007/s12161-022-02233-2
"Methods A novel 3D printed simulator for the examination and electrosurgical treatment of dysplastic regions of the cervix was compared to a conventional simulator. " With the novel simulator, Group A underwent the seminar with the conventional and Group B. With 18 questions, both groups also evaluated the training and their simulator. With four questions, Group B and Company B also evaluated the novel simulator. The results Nine of 18 questions revealed statistically significant differences favoring Group B over Group B. In addition, Group B's more thorough R0-resections and less contacts between electrosurgical loop and vagina or speculum have been achieved. Without statistically significant differences, the learning curves of the experimental resections favored the novel simulator of Group B. With a mean score of 1. 6 points and four questions focusing on particular aspects of the novel simulator, the students's confidence in them has been shown by four questions. Conclusions "The new model shows several benefits in comparison to the earlier one. ".
Source link: https://doi.org/10.1186/s41205-022-00143-x
"While post-surgical interventions such as chemotherapy and radiotherapy can reduce the risk of cancer recurrence and metastasis, and metastasis can be reduced," increasing questions about the risks and side effects have encouraged the development of implantable locoregional therapy. Notably, the CuO nanoparticles not only serve as the reservoir for producing intracellular reactive oxygen species but also act as a photothermal agent to generate heat. In vivo, you can achieve tumor recurrence after primary resection by implanting hydrogel scaffolds in the resection site.
Source link: https://doi.org/10.1186/s12951-022-01454-1
"Here, chitosan-based solid state carbon dots with yellow fluorescence and a yield of 90 percent were successfully obtained from chitosan via a one-step hydrothermal synthesis. " In addition, the occurrence of fluorescence resonance energy transfer aids in the long-wave 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 percent, 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, thereby obtaining a WLED with a color rendering index of more than 90. Abstract Chitosan-based solid emission carbon dots were used to produce a white light-emitting diode with a color rendering index greater than 90 and 3D printing. ".
Source link: https://doi.org/10.1007/s42114-022-00483-6
"We first experimentally established the scaffolds'u2019 compressive characteristics and then applied finite element analysis to investigate the scaffolds'u2019 stress distribution and failure modes. " According to results, 3D-printed PEEK with 300-u00b5 million pore size has the highest yield compressive strength, with increasing the pore size above that would decrease the specimen's yield stability. Moreover, FEA announced that the stress distribution is the highest in the scaffold core along the longitudinal axis under compressive load, less on the scaffold's outer shell. According to our research, 3D-printed PEEK specimens with 300-u00b5 million pore sizes have the best compressive yield strength suitable for orthopedic applications.
Source link: https://doi.org/10.1007/s11837-022-05361-6
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