scholarly journals 3D/4D Printing Hydrogel Composites: A Pathway to Functional Devices

MRS Advances ◽  
2015 ◽  
Vol 1 (8) ◽  
pp. 521-526 ◽  
Author(s):  
Shannon E. Bakarich ◽  
Robert Gorkin ◽  
Sina Naficy ◽  
Reece Gately ◽  
Marc in het Panhuis ◽  
...  
Keyword(s):  
Composite Materials ◽  
3D Printing ◽  
Mechanical Performance ◽  
4D Printing ◽  
Printing Technology ◽  
3D Printing Technology ◽  
The Past ◽  
Hydrogel Composites ◽  
The One ◽  
Printing Techniques

ABSTRACTThe past few years have seen the introduction of a number of 3D and 4D printing techniques used to process tough hydrogel materials. The use of ‘color’ 3D printing technology where multiple inks are used in the one print allows for the production of composite materials and structures that can further enhance the mechanical performance of the printed hydrogel. This article reviews a number of 3D and 4D printing techniques for fabricating functional hydrogel based devices.

scholarly journals 3D Printing and NIR Fluorescence Imaging Techniques for the Fabrication of Implants

Materials ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 4819
Author(s):  
Yong Joon Suh ◽  
Tae Hyeon Lim ◽  
Hak Soo Choi ◽  
Moon Suk Kim ◽  
Sang Jin Lee ◽  
...  
Keyword(s):  
3D Printing ◽  
Fluorescence Imaging ◽  
Near Infrared ◽  
Imaging Techniques ◽  
The Body ◽  
Monitoring Method ◽  
Printing Technology ◽  
3D Printing Technology ◽  
Nir Fluorescence ◽  
Printing Techniques

Three-dimensional (3D) printing technology holds great potential to fabricate complex constructs in the field of regenerative medicine. Researchers in the surgical fields have used 3D printing techniques and their associated biomaterials for education, training, consultation, organ transplantation, plastic surgery, surgical planning, dentures, and more. In addition, the universal utilization of 3D printing techniques enables researchers to exploit different types of hardware and software in, for example, the surgical fields. To realize the 3D-printed structures to implant them in the body and tissue regeneration, it is important to understand 3D printing technology and its enabling technologies. This paper concisely reviews 3D printing techniques in terms of hardware, software, and materials with a focus on surgery. In addition, it reviews bioprinting technology and a non-invasive monitoring method using near-infrared (NIR) fluorescence, with special attention to the 3D-bioprinted tissue constructs. NIR fluorescence imaging applied to 3D printing technology can play a significant role in monitoring the therapeutic efficacy of 3D structures for clinical implants. Consequently, these techniques can provide individually customized products and improve the treatment outcome of surgeries.

Model Based Development of a 3D Printed Biped Robot

2014 ◽  
Author(s):  
Won Young Kim ◽  
Kishore Pochiraju
Keyword(s):  
3D Printing ◽  
Position Control ◽  
Biped Robot ◽  
Open Loop ◽  
Printing Technology ◽  
3D Printing Technology ◽  
Model Based ◽  
3D Printed ◽  
Link Flexibility ◽  
Printing Techniques

As 3D printing technology becomes more ubiquitous and pervasive, printed robot structures are likely to become popular. However, these 3D printed structures have inherent flexibility which causes link deflections and vibrations that lead to difficulties in maintaining gait and produce instabilities during motion. In this paper a biped robot, realized with 3D printing techniques, was modeled and its gait was simulated under position control. Spring and damper elements are used within powered joints to model the link flexibility. Servos were placed at the joints and an open-loop gait trajectory was executed by posing the robot through a series of servo angles. The gait of the printed robot was designed using the model. The printed robot’s stability and accelerations during the motion were characterized with 3-axis accelerometers and gyroscopes mounted on the robot. The acceleration measurements from the printed robot are then compared with the model behavior.

TESTING THE HANDLES OF RAWAT FAMILY RIFLES FOR OPTIMISATION OF DESIGNS

2020 ◽  
Vol 153 (1) ◽  
pp. 7-20
Author(s):  
Łukasz Szmit ◽  
Dawid Goździk ◽  
Adam Gawron
Keyword(s):  
3D Printing ◽  
Printing Technology ◽  
3D Printing Technology ◽  
The Past

Results of tests on ergonomics of the handles for RAWAT project rifles are presented in the paper. The use of the rifles in the past has brought many conclusions and comments concerning the rifle handles as well. In order to cope with the expectations of customers it was decided to modify the reloading grip, deflector of cases, trigger and the safety catch. These components were redesigned, and fabricated by 3D printing technology to be finally tested. The modified components were examined by testing the functionality and convenience of using. The tests contained the handling of the rifle and firing with live ammunition.

scholarly journals The Influence of Material on the Operational Characteristics of Spur Gears Manufactured by the 3D Printing Technology

2018 ◽  
Vol 68 (3) ◽  
pp. 261-270
Author(s):  
Aleksandar Dimić ◽  
Žarko Mišković ◽  
Radivoje Mitrović ◽  
Mileta Ristivojević ◽  
Zoran Stamenić ◽  
...  
Keyword(s):  
3D Printing ◽  
Experimental Testing ◽  
Spur Gears ◽  
Additive Technology ◽  
Test Rig ◽  
Printing Technology ◽  
3D Printing Technology ◽  
The Past ◽  
Operational Characteristics ◽  
Advanced Development

AbstractThe advanced development of additive technologies over the past years led to the fact that parts made by these technologies have been increasingly used in the most diverse engineering applications. One of the most famous and the most applied additive technology is 3D printing. In this paper the influence of the material type on the operational characteristics of spur gears manufactured by the 3D printing technology is analyzed, after the experimental testing performed on a back to back gear test rig, in the predefined laboratory conditions.

scholarly journals New Insights into the Application of 3D-Printing Technology in Hernia Repair

Materials ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 7092
Author(s):  
Bárbara Pérez-Köhler ◽  
Selma Benito-Martínez ◽  
Verónica Gómez-Gil ◽  
Marta Rodríguez ◽  
Gemma Pascual ◽  
...  
Keyword(s):  
3D Printing ◽  
Hernia Repair ◽  
Soft Tissues ◽  
Mechanical Performance ◽  
Abdominal Hernia ◽  
Abdominal Muscles ◽  
Contrast Imaging ◽  
Printing Technology ◽  
3D Printing Technology ◽  
Antibacterial Performance

Abdominal hernia repair using prosthetic materials is among the surgical interventions most widely performed worldwide. These materials, or meshes, are implanted to close the hernial defect, reinforcing the abdominal muscles and reestablishing mechanical functionality of the wall. Meshes for hernia repair are made of synthetic or biological materials exhibiting multiple shapes and configurations. Despite the myriad of devices currently marketed, the search for the ideal mesh continues as, thus far, no device offers optimal tissue repair and restored mechanical performance while minimizing postoperative complications. Additive manufacturing, or 3D-printing, has great potential for biomedical applications. Over the years, different biomaterials with advanced features have been successfully manufactured via 3D-printing for the repair of hard and soft tissues. This technological improvement is of high clinical relevance and paves the way to produce next-generation devices tailored to suit each individual patient. This review focuses on the state of the art and applications of 3D-printing technology for the manufacture of synthetic meshes. We highlight the latest approaches aimed at developing improved bioactive materials (e.g., optimizing antibacterial performance, drug release, or device opacity for contrast imaging). Challenges, limitations, and future perspectives are discussed, offering a comprehensive scenario for the applicability of 3D-printing in hernia repair.

scholarly journals Current applications of 3d printing in neurosurgery

2019 ◽  
pp. 417-423
Author(s):  
A. Chiriac ◽  
A. Iencean ◽  
Georgiana Ion ◽  
G. Stan ◽  
S. Munteanu ◽  
...  
Keyword(s):  
Medical Education ◽  
3D Printing ◽  
Surgical Planning ◽  
Patient Specific ◽  
Printing Technology ◽  
3 Dimensional ◽  
3D Printing Technology ◽  
Assessment And Treatment ◽  
Printing Techniques

Medical implications of 3-dimensional (3D) printing technology have progressed with increasingly used especially in surgical fields. 3D printing techniques are practical and anatomically accurate methods of producing patient specific models for medical education, surgical planning, training and simulation, and implants production for the assessment and treatment of neurosurgical diseases. This article presents the main directions of 3D printing models application in neurosurgery.

Capability of 3D Printing Technology in Producing Molar Teeth Prototype

2020 ◽  
Vol 8 (2) ◽  
pp. 64
Author(s):  
Mohd Nazri Ahmad ◽  
Ahmad Afiq Tarmeze ◽  
Amir Hamzah Abdul Rasib
Keyword(s):  
3D Printing ◽  
Printing Technology ◽  
3D Printing Technology ◽  
Molar Teeth
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