scholarly journals Surgical treatment for both-column acetabular fractures using pre-operative virtual simulation and three-dimensional printing techniques

2020 ◽  
Vol 133 (4) ◽  
pp. 395-401 ◽  
Author(s):  
Ji-Hui Huang ◽  
Hui Liao ◽  
Xin-Yu Tan ◽  
Wei-Rong Xing ◽  
Qi Zhou ◽  
...  
Keyword(s):  
Surgical Treatment ◽  
Three Dimensional ◽  
Virtual Simulation ◽  
Acetabular Fractures ◽  
Three Dimensional Printing ◽  
Dimensional Printing ◽  
Printing Techniques

scholarly journals Plant-inspired pipettes

2018 ◽  
Vol 15 (140) ◽  
pp. 20170868 ◽  
Author(s):  
Keigo Nakamura ◽  
Tetsuya Hisanaga ◽  
Koichi Fujimoto ◽  
Keiji Nakajima ◽  
Hirofumi Wada
Keyword(s):  
Three Dimensional ◽  
Maximum Size ◽  
Experimental Investigations ◽  
Marchantia Polymorpha ◽  
Water Droplets ◽  
Rigid Object ◽  
Three Dimensional Printing ◽  
Simple Scaling ◽  
Dimensional Printing ◽  
Printing Techniques

The female sex organ of the liverwort ( Marchantia polymorpha ) has a characteristic parasol-like form highly suitable for collecting water droplets containing sperm for fertilization. Motivated by this observation and using three-dimensional printing techniques, we develop a parasol-like rigid object that can grab, transport and release water droplets of a maximum size of about 1 cm. By combining experiments and scaling theory, we quantify the object's fundamental wetting and fluid dynamical properties. We construct a stability phase diagram and suggest that it is largely insensitive to properties of liquids such as surface tension and viscosity. A simple scaling argument is developed to explain the phase boundary. Our study provides basic design rules of a simple pipette-like device with bubble-free capture and drop of liquids, which can be used in laboratory settings and has applications within soft robotics. Through systematic experimental investigations, we suggest the optimal design criteria of the liverwort-inspired object to achieve maximal pipetting performance. We also provide, based on our scalable model experiments, a biological implication for the mechanistic advantage of this structure in liverwort reproduction.

Ankylosis and pseudoankylosis of the temporomandibular joint in 10 dogs (1993–2015)

2016 ◽  
Vol 29 (05) ◽  
pp. 409-415 ◽  
Author(s):  
Peter Strøm ◽  
Boaz Arzi ◽  
Derek Cissell ◽  
Frank Verstraete
Keyword(s):  
Surgical Treatment ◽  
Range Of Motion ◽  
Temporomandibular Joint ◽  
Three Dimensional ◽  
Case Series ◽  
Patient Specific ◽  
Three Dimensional Printing ◽  
Temporomandibular Joint Ankylosis ◽  
Dimensional Printing ◽  
Joint Ankylosis

SummaryObjective: To describe the clinical features and results of treatment of true ankylosis and pseudoankylosis of the temporomandibular joint in dogs.Methods: This study was a retrospective case series. Ten client-owned dogs that were presented for inability to open the mouth or a severely decreased range of motion of the temporomandibular joint were included. Information on the surgical procedures performed and the perioperative complications were documented. Three-dimensional printing of the skull was performed in four dogs.Results: Two dogs were diagnosed with temporomandibular joint ankylosis and seven dogs with pseudoankylosis. One dog had evidence of combined temporomandibular joint ankylosis and pseudoankylosis. Of the seven dogs with pseudoankylosis, six had an osseous fusion involving the zygomatic arch and mandible. Surgical treatment was performed in nine dogs and a revision surgery was needed in one dog. Follow-up ranged from five months to eight years (mean: 48.6 months). Eight out of nine dogs that were treated surgically regained the ability to open their mouth, but six dogs never regained a fully normal temporomandibular joint range of motion.Clinical significance: Temporomandibular joint ankylosis and pseudoankylosis are uncommon in the dog. Surgical treatment for temporomandibular joint ankylosis or pseudoankylosis in dogs is a successful option and carries a prognosis dependent on patient-specific abnormalities. Computed tomography complemented with three- dimensional printing is valuable for understanding the extent of abnormalities and for preoperative planning.Supplementary material for this paper is available online at http://dx.doi.org/10.3415/VCOT-15-11-0189.

scholarly journals Three-dimensional printing of tactile sensors for soft robotics

MRS Bulletin ◽  
2021 ◽  
Author(s):  
Xinran Zhou ◽  
Pooi See Lee
Keyword(s):  
3D Printing ◽  
Three Dimensional ◽  
Tactile Sensor ◽  
Soft Robotics ◽  
Fabrication Method ◽  
Tactile Sensors ◽  
Three Dimensional Printing ◽  
Future Potential ◽  
Dimensional Printing ◽  
Printing Techniques

AbstractThree-dimensional (3D) printing has become an important fabrication method for soft robotics, due to its ability to make complex 3D structures from computer designs in simple steps and multimaterial co-deposition ability. In this article, the application of 3D printing techniques in the fabrication of four types of tactile sensors commonly used in soft robotics, including the piezoresistive tactile sensor, capacitive tactile sensor, piezoelectric tactile sensor, and triboelectric tactile sensor, will be discussed. The 3D printing mechanism, material, and structure for each type of sensor will be introduced, and the perspectives on the future potential of 3D printable tactile sensors will be discussed.

scholarly journals Fine Details Obtained by 3D Printing and Using Polymers

2018 ◽  
Vol 55 (4) ◽  
pp. 474-477
Author(s):  
Laurentiu Slatineanu ◽  
Oana Dodun ◽  
Gheorghe Nagit ◽  
Margareta Coteata ◽  
Gheorghe Bosoanca ◽  
...  
Keyword(s):  
3D Printing ◽  
Three Dimensional ◽  
Printing Process ◽  
Three Dimensional Printing ◽  
Manufacturing Method ◽  
Nozzle Orifice ◽  
Systemic Analysis ◽  
Dimensional Printing ◽  
Printing Techniques ◽  
Isosceles Triangles

The three-dimensional printing is a manufacturing method involving the addition of materials by using certain principles valid in printing techniques. There are various techniques of a three-dimensional printing method and the most of them could be applied inclusively to generate objects of polymers. The objective of the research presented in this paper was to analyze the capabilities of 3D printing process or equipment of generating fine details and to identify a way of evaluating these capabilities when using polyester PLA as filament material. The systemic analysis of the printing techniques which use a fused polymer filament deposition showed that there are some groups of factors able to affect the obtaining of fine details. An experimental research was designed in order to highlight the influence exerted by the diameter of the nozzle orifice and by the values of sharp angles of isosceles triangles on the heights of these triangles, thus obtaining an image concerning the possibilities of generating sharp edges by three-dimensional printing. To evaluate the capacity of the 3D printing process of obtaining thin walls, a spiral including linear segments with a decreasing thickness from 1 mm was also achieved on the test piece. By mathematical processing of the experimental results using a specialized software, empirical mathematical models were determined to evaluate the intensity of influences exerted by the two process input factors on the heights corresponding to isosceles triangles characterized by sharp angles.

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