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3D Printed - Crossref

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Last Updated: 10 November 2022

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DAR 16-II Primes Endothelial Cells for Angiogenesis Improving Bone Ingrowth in 3D-Printed BCP Scaffolds and Regeneration of Critically Sized Bone Defects

Bone is a highly vascularized tissue and depends on angiogenesis and response of cells in the immediate environmental niche at the defect site for regeneration, contributing to the angiogenesis and response of cells. A three-dimensional -printed biphasic calcium phosphate scaffolds coated with self-assembling DAR 16-II peptide provide a support template with the ability to recruit and enhance cell adhesion. Both human umbilical vein endothelial cells and human mesenchymal stem cells adhered to each other's endothelial cell proliferation and an angiogenic phenotype, according to In vitro studies, favoring endothelial cell activation toward an angiogenic phenotype. The upregulation of proteins involved in cell adhesion, migration, cytoskeletal re-arrangement, immunomodulation, and morphogenesis was demonstrated by a complete proteomic analysis of DAR 16-II-treated HUVECs' morphogenesis. When adsorbed onto BCP scaffolds, DAR 16-II acts as a proactive angiogenic factor, facilitating the translation of 3D-printed BCP scaffolds for clinical use.

Source link: https://doi.org/10.3390/biom12111619


Influence of layer bonding on compressive strength of 3D printed structure: An experimental study

In this study, a combination of layer thickness and print speed is investigated, as well as the effect of bonding layers on the compressive strength of the material. Layer thicknesses of 0. 05mm and 0. 15mm have similar elastic properties, while the 0. 15mm layer can take more load after initial plastic deformation. Although layer thickness of 0. 30mm has significantly reduced elastic zone load capacity, the strain on plastic zone continues to increase.

Source link: https://doi.org/10.37868/sei.v4i1.id159


The Design of 3D-Printed Polylactic Acid–Bioglass Composite Scaffold: A Potential Implant Material for Bone Tissue Engineering

A bio-based and patient-specific three-dimensional scaffold can be used to introduce next-generation bone tissue engineering to correct critical bone size abnormalities. A composite filament of poly lactic acid and 45S5 bioglass was used in this study to 3D print scaffolds intended for bone tissue repair, which were used in the present study. This report reports on the successful processing of PLA-BG 3D-printed composite scaffolds and their potential as an implant material with a tunable pore structure and mechanical properties for regenerative bone tissue engineering.

Source link: https://doi.org/10.3390/molecules27217214


3D-Printed Fiber-Reinforced Polymer Composites by Fused Deposition Modelling (FDM): Fiber Length and Fiber Implementation Techniques

Due to its ability to produce complex shapes in a short time, additive manufacturing technology is quickly expanding additive manufacturing technology. However, the mechanical properties of FDM printed parts are still poorer than those of conventionally made parts. Fiber reinforced polymer matrix is one of the potential solutions. Reinforce polymer matrix with fiber is one of the available options. This paper discusses the fiber types and fiber insertion techniques of FDM 3D printed fiber reinforcement polymer composites, as well as the fiber embedder polymer composites. A short summary of fused deposition modeling, polymer sintering, and void formation during FDM printing is given, as well as the establishment of fiber reinforced polymer composites, type of fabrics, and composites' 2019 results are included. In addition, three specific manufacturing techniques of fiber reinforced thermoplastics, namely u2019embedding in the nozzle and u2018embedding on the component u2019embedding', are briefly discussed.

Source link: https://doi.org/10.3390/polym14214659


Accuracy of a Three-Dimensional (3D)-Printed Patient-Specific (PS) Femoral Osteotomy Guide: A Computed Tomography (CT) Study

Femoral neck osteotomy, a surgical staple in surgery, produces a significant anatomical landmark for surgeons doing primary Total Hip Arthroplasty; it affects the final height and position of the femoral component. Using three-dimensional computed tomography analysis, we sought to determine the accuracy of a patient-specific femoral osteotomy guide in primary THA. All patients underwent 3D testing to determine the optimal femoral neck osteotomy level. We discovered a strong positive correlation between the planned and the achieved osteotomy level. Our results show that surgeons can produce a femoral neck osteotomy with a high degree of certainty to the procedure using 3D-printed PS guides.

Source link: https://doi.org/10.3390/bioengineering9110667


Influence of curvy stiffeners on the axial crushing response of 3D-printed polymer composite cylindrical tubular structures

The axial crushing performance of various polymer and polymer composite tubular structures with different types of curved stiffeners is investigated experimentally by the authors. The successfully manufactured tubes' axial crushing characteristics were determined and compared, and quasi-static axial crushing tests were carried out subsequently. In all of the tested tube configurations, cylindrical tubes with curvy stiffeners demonstrate a more stable crushing response with increased energy absorption capability.

Source link: https://doi.org/10.1177/14644207221137545


A 3D-Printed Spiral Actuator for Focus Adjustment in Circumferential Scanning Endomicroscopy

Abstract We suggest that laser scanning be used in wireless capsule endoscopy to provide high-resolution images at multiple depth sections throughout the gastrointestinal tract. In this report, we highlight the focus adjustment actuator's appearance, manufacture, and analysis. To aid focusing by electromagnetic actuation, the actuator has a spiral flexure, carrying a camera and multiple magnets at its center. For optimal results, the relationship between the spiral flexure length and the lens size is investigated. To obtain data from targets placed at various depths, axially spanning a range of 5 mm, an external coil is used to propel the lens actuator with a low cost. We also display data acquisition with reflective goals set at different depths. An integrated circuit and antenna layout are also discussed.

Source link: https://doi.org/10.1088/1361-6439/aca100

* 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