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3d Printing - DOAJ

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Last Updated: 10 November 2022

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Natural and Naturally Derived Photoinitiating Systems for Light-Based 3D Printing

Photoinitiating devices are essential components in photocurable formulations for 3D printing. Natural PIS are promising and more cost-effective alternatives to conventional photoinitiators, which are also more environmentally friendly alternatives to conventional photoinitiators. We discuss the latest efforts to use natural and naturally derived PIS in light-based 3D printing in this article. The discussion of natural PIS and their results for light-based 3D printing is reviewed in the first article.

Source link: https://doi.org/10.1055/a-1976-0453


Simulated Surgical Model Design for Myringotomy and Tympanostomy Tube Insertion in Children using Medical Image Processing and 3D-Printing Technologies

Researchers set out to create surgical simulation models using medical image processing and 3D-printing technologies to educate otolaryngology residents with safe surgical methods and skills improvement. In order from models A, B, and C, the most significant changes in myringotomy incision and tympanostomy tube insertion occurred. Operating time and surgical skills increased in order in order from models A, B, and C. Conclusion: Surgical simulation models increased residencies'u2019 confidence and improved surgical skills, raising surgical techniques. Residencies can learn skills from basic to more advanced techniques in a younger child model where symptomatic responses are common.

Source link: https://doaj.org/article/f4c12ff7f5f24718ab092e8b6a3e1e73


Formation mechanism and roles of oxygen vacancies in melt-grown Al2O3/GdAlO3/ZrO2 eutectic ceramic by laser 3D printing

Abstract Laser three-dimensional printing has evolved to a common method to produce high-performance Al2O3-based eutectic ceramics based on melt growth. The origins of the oxygen vacancies was determined by a well-designed annealing experiment in this paper. Oxy atom transfer from the oxide ceramic to the oxygen-deficient atmosphere by means of a vacancy migration device is believed to be the source of oxygen vacancies. However, the chemical bond property of the as-deposited eutectic ceramic changes to some degree as a result of the crystal defects' formation, which may influence the mechanical properties of the as-deposited eutectic ceramic. Since removing the oxygen vacancies, the hardness decreases by 3. 9 percent, and fracture toughness rises by 13. 3%. The findings may lead to a potential policy to limit the mechanical stability of the oxide ceramic materials.

Source link: https://doi.org/10.1007/s40145-022-0645-8


Photocuring and digital light processing 3D printing of vitrimer composed of 2-hydroxy-2-phenoxypropyl acrylate and acrylated epoxidized soybean oil

Vitrimers have gained attention as a result of their recyclability, auto-healing, and shape memory properties. Because of the use of an environmentally friendly approach, the use of bio-based monomers for the production of vitrimers is particularly significant. Resins based on 2-hydroxypropyl acrylate and acrylated epoxidized soybean oil were developed and tested by real-time photorheometry, Fourier's transform infrared spectroscopy, and mechanical testing to determine suitability for digital light processing 3D printing. In order to demonstrate vitrimeric capabilities, such as self-healing, shape memory properties, reprocessability, and recyclability, a resin with the highest amounts of hydroxyl and ester groups that are beneficial for transesterification reactions was chosen for vitrimer synthesis in order to demonstrate vitrimer synthesis. The synthesized vitrimer was used to digital light processing 3D printing and showed shape memory with a recovery ratio of 100%, self-healing, and reprocessability with an efficiency of 47 and 31%, with a rate of 47 and 31%.

Source link: https://doi.org/10.3144/expresspolymlett.2023.5


Synthesis and properties of a novel waterborne photosensitive resin for 3D printing

With the growing double bonds conversion content, the photopolymerization conversion increases from 78. 7, 85. 6 to 92. 8%, respectively, and the UV-cured film's gel content increases from 48. 05, 69. 10 to 83. 2 percent. The results show that with the increasing double bonds content, the double bond conversion rate has increased from 78. 7, 85. 6 to 82. 8%. In addition, the UV-cured film's glass transition temperature and tensile strength are also on the same increasing trend. According to the studies, when the hydrochloride content decreases, the surface water contact angle of the UV-cured film increases from 10. 8, 22. 9 to 51. 5 percent, respectively, and water absorption decreases from 26. 55, 16. 20 to 11. 06%.

Source link: https://doi.org/10.3144/expresspolymlett.2023.4


In vitro biocompatibility evaluation of a heat‐resistant 3D printing material for use in customized cell culture devices

Heat steam sterilization is the most common method for sterilizing 3D printing parts, but most commercially available 3D printing supplies are unable to withstand high temperatures. The extraction media obtained from 3D-u2010printed parts of L929 cells and the development of S. cerevisiae's growth had no negative effect on the aforementioned cell types, although, in contrast, viability and cell growth of HEK 293E cells were affected, although, in contrast, viability and expansion of HEK 293E cells were unchanged. When comparing heat steam sterilization and disinfection with ethanol, there were no different effects of the material on the cells. However, the biocompatibility of the material for other cell types needs to be re-u2010 evaluated in principle. In principle, the tested material shows promising results for high-u2010resolution 3D printing of novel cell culture systems that are highly versatile in structure, customizable, and easily sterilizable, however,u2014however, the biocompatibility of the material for other cell types needs to be re-u2013 evaluated.

Source link: https://doi.org/10.1002/elsc.202100104


Applications of 3D printing in forensic medicine and forensic pathology. A systematic review

In 2011, the first journal focusing on 3D printing in the field of forensic medicine and pathology was released in 2011, but publications were scarce until 2017. The articles show that 3D printing can be used in everyday medical practice for various reasons, including injury reconstruction, weaponized comparison, detection, and courtroom demonstration and teaching.

Source link: https://doi.org/10.1016/j.stlm.2022.100083


Cryogenic 3D printing of bifunctional silicate nanoclay incorporated scaffolds for promoted angiogenesis and bone regeneration

Bone defects are identified as promising bone scaffolds with high mechanical durability and excellent bone regenerative ability/angiogenic properties. The vascular scaffold fabricated by the hierarchically porous PLGA/u03b2/LAP composite scaffold had good initial mechanical stability and led to improved cell adhesion among rat bone marrow stem cells and endothelial progenitor cells. In addition, the PLGA/UT03b2-TCP/LAP scaffold supported the production of type H vessels and bony regeneration in vivo. Overall, the inorganic LAP's delivery of a 3D printed PLGA/u03b2-TCP scaffold delivers a simple and cost-effective method to achieve bone repair for critical-sized bone defects by improved angiogenesis and osteogenesis.

Source link: https://doi.org/10.1016/j.matdes.2022.111220


Electropolishing-enhanced, high-precision 3D printing of metallic pentamode metamaterials

Additive 3D printing has been one of the most popular and cost-effective methods to create 3D intricate models. A novel electropolishing-enhanced 3D printing technique is used to produce high-precision metallic PMs with increased stability and surface smoothness. Experimental results show that this mixed additive-subtractive process can produce PMs with much smaller critical size and smoother surface, which cannot be achieved by same-level 3D printing techniques. This innovative low-cost, high-precision printing, which is primarily electropolishing-enhanced 3D printing, defies conventional 3D printing by a significant margin and shows promise in low-cost, high-precision manufacturing.

Source link: https://doi.org/10.1016/j.matdes.2022.111211


3D printing of bone scaffolds for treating infected mandible bone defects through adjustable dual-release of chlorhexidine and osteogenic peptide

Implant-related bone disease correction in the irregular defect can cause surgical failure and other medical complications. A rapid CHX release from CHX@GO on scaffold surface to kill the bacteria, as well as a continuous release of CHX and p24 from the scaffold matrix to reduce infection outbreak and bone regeneration. In addition, the p24 and phosphate ions isolated from dissociated TCP nanoparticles may have contributed to bone marrow stem cell differentiation.

Source link: https://doi.org/10.1016/j.matdes.2022.111288

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions