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JOURNAL ARTICLE
Qinghua Chen, Bin Zou, Xinfeng Wang, Xingguo Zhou, Gongxian Yang, Qingguo Lai, Yun Zhao
Developing a gradient porous scaffold similar to bone structure is gaining increasing attention in bone tissue engineering. The GelMA/HAP hydrogel has demonstrated potential in bone repair. Although 3D printing can build GelMA/HAP with porous structure, fabricating porous GelMA/HAP with gradient porosity and pore size in one step remains challenging. In this paper, a gradient porous structure with controllable pore size, based on gelatin methacryloyl (GelMA) and hydxroxyapatite (HAP), was engineered and printed using stereolithography...
April 12, 2024: Journal of the Mechanical Behavior of Biomedical Materials
#2
JOURNAL ARTICLE
Fariborz Tavangarian, Sorour Sadeghzade, Niloofar Fani, Dariush Khezrimotlagh, Keivan Davami
Recently, the replication of biological microstructures has garnered significant attention due to their superior flexural strength and toughness, coupled with lightweight structures. Among the most intriguing biological microstructures renowned for their flexural strength are those found in the Euplectella Aspergillum (EA) marine sponges. The remarkable strength of this sponge is attributed to its complex microstructure, which consists of concentric cylindrical layers known as spicules with organic interlayers...
April 17, 2024: Journal of the Mechanical Behavior of Biomedical Materials
#3
JOURNAL ARTICLE
Rodrigo Rivera, Alvaro Cespedes, Juan Pablo Cruz, Aymeric Rouchaud, Charbel Mounayer
BACKGROUND AND PURPOSE: Transvenous embolization has emerged as a novel technique for treating selected brain AVMs with high reported occlusion rates. However, it requires anatomic and technical skills to be successful and to ensure patient safety. Therefore, training and testing are essential for preparing clinicians to perform these procedures. Our aim was to develop and test a novel, patient-specific brain AVM in vitro model for transvenous embolization by using 3D printing technology...
April 18, 2024: AJNR. American Journal of Neuroradiology
#4
JOURNAL ARTICLE
Sebastiana Arroyo-Bote, Catalina Bennasar-Verger, Andrés Martínez-Jover, Pablo Ferragut-Pina, Pere Riutot-Sbert, Ángel Arturo López-González, Pål Barkvol
INTRODUCTION: The acquisition of skills and manual dexterity in aesthetic dentistry in undergraduate teaching requires preclinical practices with simulation that should approximate real clinical situations. OBJECTIVE: We will present a digital procedure for the creation of three-dimensional (3D) resin models adapted to the practices of the Aesthetic Dentistry course. MATERIAL AND METHOD: Stereolithography or Standard Tesellation Language (STL) files of a real patient were previously obtained with a 3-shape intraoral scanner...
April 18, 2024: Journal of Dental Education
#5
JOURNAL ARTICLE
Zahra Haghpanah, Dibakar Mondal, Nikan Momenbeitollahi, Sadaf Mohsenkhani, Kiyoumars Zarshenas, Yutong Jin, Michael Watson, Thomas Willett, Maud Gorbet
Critically-sized segmental bone defects represent significant challenges requiring grafts for reconstruction. 3D-printed synthetic bone grafts are viable alternatives to structural allografts if engineered to provide appropriate mechanical performance and osteoblast/osteoclast cell responses. Novel 3D-printable nanocomposites containing acrylated epoxidized soybean oil (AESO) or methacrylated AESO (mAESO), polyethylene glycol diacrylate, and nanohydroxyapatite (nHA) were produced using masked stereolithography...
April 15, 2024: Journal of Biomedical Materials Research. Part A
#6
JOURNAL ARTICLE
Mégane Clerget, Eric Gagnon, Jerome P Claverie
Epoxidized vegetable oils and limonene dioxide, a bis-epoxide derived from the terpene limonene, are photo-copolymerized to yield highly crosslinked networks with high conversion of all epoxide groups at ambient temperature. However, the slow polymerization of such biobased formulation polymerizes is not compatible for a use in a commercial SLA 3D printer. Adding an acrylated epoxidized vegetable oil to the bis-epoxide leads to a decrease of curing time and an increase in LDO conversion to polymer. For example, in a 60:40 wt:wt mixture of LDO and epoxidized soybean oil, the conversions of both exocyclic and endocyclic epoxide groups of LDO are ≥95%...
April 2, 2024: Polymers
#7
JOURNAL ARTICLE
Adolfo C O Lopes, Ernesto B Benalcázar-Jalkh, Edmara T P Bergamo, Tiago M B Campos, Laura F de Carvalho, Ricardo Tanaka, Luis A Genova, Satoshi Yamaguchi, Lukasz Witek, Paulo G Coelho, Estevam A Bonfante
The present work aims to develop a production method of pre-sintered zirconia-toughened-alumina (ZTA) composite blocks for machining in a computer-aided design and computer-aided manufacturing (CAD-CAM) system. The ZTA composite comprised of 80% Al2 O3 and 20% ZrO2 was synthesized, uniaxially and isostatically pressed to generate machinable CAD-CAM blocks. Fourteen green-body blocks were prepared and pre-sintered at 1000 °C. After cooling and holder gluing, a stereolithography (STL) file was designed and uploaded to manufacture disk-shaped specimens projected to comply with ISO 6872:2015...
April 1, 2024: Journal of the Mechanical Behavior of Biomedical Materials
#8
JOURNAL ARTICLE
Lisa Asciak, Roger Domingo-Roca, Jamie R Dow, Robbie Brodie, Niall Paterson, Philip E Riches, Wenmiao Shu, Christopher McCormick
Despite polyester vascular grafts being routinely used in life-saving aortic aneurysm surgeries, they are less compliant than the healthy, native human aorta. This mismatch in mechanical behaviour has been associated with disruption of haemodynamics contributing to several long-term cardiovascular complications. Moreover, current fabrication approaches mean that opportunities to personalise grafts to the individual anatomical features are limited. Various modifications to graft design have been investigated to overcome such limitations; yet optimal graft functionality remains to be achieved...
March 30, 2024: Journal of the Mechanical Behavior of Biomedical Materials
#9
JOURNAL ARTICLE
Lais Vernasqui, Miguel A Montiel, Neidenêi Gomes Ferreira, Pablo Cañizares, Manuel A Rodrigo
Boron-doped diamond (BDD) electrodes are the most effective and resistant electrodic materials to perform advanced oxidation processes. Having a reactor that can provide adequate hydrodynamic conditions is mandatory to use these electrodes effectively. In this work, the diamond anode electrochemical reactor (E3L-DAER) is designed to fulfill this necessity. Several features are included to improve its efficiency, like conic inlet/outlet, flow enhancers, and a reduced interelectrode gap. The fluid dynamic validation has been performed using computer fluid dynamics (CFD) calculations, residence time distribution (RDT) curves, and mass transfer analysis...
April 3, 2024: Industrial & Engineering Chemistry Research
#10
JOURNAL ARTICLE
Tayler S Hebner, Bruce E Kirkpatrick, Benjamin D Fairbanks, Christopher N Bowman, Kristi S Anseth, Danielle S W Benoit
Michael addition between thiol- and maleimide-functionalized molecules is a long-standing approach used for bioconjugation, hydrogel crosslinking, and the functionalization of other advanced materials. While the simplicity of this chemistry enables facile synthesis of hydrogels, network degradation is also desirable in many instances. Here, the susceptibility of thiol-maleimide bonds to radical-mediated degradation is reported. Irreversible degradation in crosslinked materials is demonstrated using photoinitiated and chemically initiated radicals in hydrogels and linear polymers...
April 6, 2024: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
#11
JOURNAL ARTICLE
Su-Min Cho, Ryan Jin Young Kim, Ji-Man Park, Hye-Min Chung, Deok-Yeong Kim
OBJECTIVE: This study aimed to conduct a comparison of trueness and physical and surface properties among five distinct types of additive manufactured (AM) zirconia crowns and zirconia crowns produced using the subtractive manufacturing (SM). MATERIAL AND METHODS: Zirconia crowns were fabricated using five distinct techniques, each varying in the method of slurry transfer and photocuring source. Each experimental group utilized either one of the four digital light processing (DLP)-based techniques (DLP spreading, DLP spreading gradation, DLP vat and DLP circular spreading) or the stereolithography (SLA)-based technique (SLA spreading)...
April 2, 2024: Journal of the Mechanical Behavior of Biomedical Materials
#12
JOURNAL ARTICLE
Adilet Zhakeyev, Rohith Devanathan, Jose Marques-Hueso
Traditional photopolymer-based 3D printing methods require sequential printing of thin layers, due to short penetration depths of UV or blue light sources used by these techniques. In contrast, upconversion 3D printing circumvents the layer-by-layer limitation by taking advantage of upconversion luminescence processes and the high penetration depths offered by near-infrared (NIR) lasers, allowing for selective crosslinking of voxels at any depth or position within the resin container. The implementation of this technique required the construction of a 3D printer with the ability of focusing the laser on any point of the space...
June 2024: HardwareX
#13
JOURNAL ARTICLE
Yongding Sun, Jin Cui, Shiwei Feng, Jingjing Cui, Yunlong Guo, Chen Liang, Weizi Gao, Zhe Lu, Fukang Liu, Biao Zhang
Hydrogel-based electronics have inherent similarities to biological tissues and hold potential for wearable applications. However, low conductivity, poor stretchability, non-personalizability, and uncontrollable dehydration during use limit their further development. In this study, we report projection stereolithography 3D printing high-conductive hydrogel for flexible passive wireless sensing. The prepared photocurable silver-based hydrogel is rapidly planarized into antenna shapes on substrates using surface projection stereolithography...
April 4, 2024: Advanced Materials
#14
JOURNAL ARTICLE
Thomas J Kolibaba, Jason P Killgore, Benjamin W Caplins, Callie I Higgins, Uwe Arp, C Cameron Miller, Dianne L Poster, Yuqin Zong, Scott Broce, Tong Wang, Vaidas Talačka, Jonathan Andersson, Amelia Davenport, Matthew A Panzer, John R Tumbleston, Jasmine M Gonzalez, Jesse Huffstetler, Benjamin R Lund, Kai Billerbeck, Anthony M Clay, Marcus R Fratarcangeli, H Jerry Qi, Dominique H Porcincula, Lindsey B Bezek, Kenji Kikuta, Matthew N Pearlson, David A Walker, Corey J Long, Erion Hasa, Alan Aguirre-Soto, Angel Celis-Guzman, Daniel E Backman, Raghuveer Lalitha Sridhar, Kevin A Cavicchi, R J Viereckl, Elliott Tong, Christopher J Hansen, Darshil M Shah, Cecelia Kinane, Abdon Pena-Francesch, Carlo Antonini, Rajat Chaudhary, Gabriele Muraca, Yousra Bensouda, Yue Zhang, Xiayun Zhao
The working curve informs resin properties and print parameters for stereolithography, digital light processing, and other photopolymer additive manufacturing (PAM) technologies. First demonstrated in 1992, the working curve measurement of cure depth vs radiant exposure of light is now a foundational measurement in the field of PAM. Despite its widespread use in industry and academia, there is no formal method or procedure for performing the working curve measurement, raising questions about the utility of reported working curve parameters...
March 2024: Additive Manufacturing
#15
JOURNAL ARTICLE
Cameron Bell, Alborz Feizi, Gregory R Roytman, Alim F Ramji, Steven M Tommasini, Daniel H Wiznia
BACKGROUND: Femoral head avascular necrosis (AVN), or death of femoral head tissue due to a lack of blood supply, is a leading cause of total hip replacement for non-geriatric patients. Core decompression (CD) is an effective treatment to re-establish blood flow for patients with AVN. Techniques aimed at improving its efficacy are an area of active research. We propose the use of 3D printed drill guides to accurately guide therapeutic devices for CD. METHODS: Using femur sawbones, image processing software, and 3D modeling software, we created a custom-built device with pre-determined drill trajectories and tested the feasibility of the 3D printed drill guides for CD...
April 2, 2024: 3D Printing in Medicine
#16
JOURNAL ARTICLE
Chakree Leeisaramas, Nattapon Chantarapanich, Samroeng Inglam, Kanlaya Insee
OBJECTIVES: This study aimed to investigate the stress distribution pattern of the palatal slope bone-borne expander on the maxillary area according to a different anteroposterior position of anchored miniscrews using finite element analysis. MATERIALS AND METHODS: Nasomaxillary stereolithography files with three different anteroposterior anchored miniscrew positions of the palatal slope bone-borne expander were determined as model A, B, and C. Each model consists of four supported miniscrews...
March 31, 2024: European Journal of Dentistry
#17
JOURNAL ARTICLE
Pierre-Etienne Serree, Eugénie Bertin, Camille Coussens, Eleonore Brumpt, Jean-François Devoti, Aurélien Louvrier
INTRODUCTION: Several medical devices (MDs) are used to assist surgeons in positioning the upper dental arch (UDA) during Le Fort I osteotomies (LFIOs). Some only allow holding, others only positioning. This study aimed to assess the accuracy of a new MD (PirifixTM ) coupling these two functions during LFIO on 3D-printed models. MATERIALS AND METHODS: DICOM data were selected from patients who underwent surgical planning for LFIO between 27 July 2020 and 1 December 2022...
March 20, 2024: Journal of Personalized Medicine
#18
JOURNAL ARTICLE
Ziyong Li, Yanwen Jia, Ke Duan, Ran Xiao, Jingyu Qiao, Shuyu Liang, Shixiang Wang, Juzheng Chen, Hao Wu, Yang Lu, Xiewen Wen
The applications of silica-based glass have evolved alongside human civilization for thousands of years. High-precision manufacturing of three-dimensional (3D) fused silica glass objects is required in various industries, ranging from everyday life to cutting-edge fields. Advanced 3D printing technologies have emerged as a potent tool for fabricating arbitrary glass objects with ultimate freedom and precision. Stereolithography and femtosecond laser direct writing respectively achieved their resolutions of ~50 μm and ~100 nm...
March 27, 2024: Nature Communications
#19
REVIEW
Muthanna Aziz, Amged El Hassan, Mousa Hussein, Essam Zaneldin, Ali H Al-Marzouqi, Waleed Ahmed
Antennas play a critical role in modern technology. They are used in various devices and applications, including wireless communication, broadcasting, navigation, military, and space. Overall, the importance of antennas in technology lies in their ability to transmit and receive signals, allowing communication and information transfer across various applications and devices. Three-dimensional printing technology creates antennas using multiple materials, including plastics, metals, and ceramics. Some standard 3D printing techniques used to create antennas include Fused Deposition Modeling (FDM), Stereolithography (SLA), and Selective Laser Sintering (SLS)...
March 30, 2024: Heliyon
#20
JOURNAL ARTICLE
Jun Haruma, Ryu Kimura, Masafumi Hiramatsu, Kenji Sugiu
Several studies have reported the importance of preoperative simulations. This report describes the methods and utility of neuroendovascular treatment using a three-dimensional(3D)-printed hollow cerebral aneurysm model. This model was created using a stereolithography apparatus-type 3D printer with digital imaging and communications in medicine data from 3D digital subtraction angiograms. The 3D model was used to perform preoperative simulations of microcatheter placement in aneurysms, microguidewire manipulation, and stent deployment...
March 2024: No Shinkei Geka. Neurological Surgery
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