scholarly journals Mapping internal deformation fields in 3D printed porous structure with digital volume correlation

2019 ◽  
Vol 78 ◽  
pp. 105945 ◽  
Author(s):  
Bo Wang ◽  
Lijuan Sun ◽  
Bing Pan
Keyword(s):  
Porous Structure ◽  
Digital Volume Correlation ◽  
3D Printed ◽  
Internal Deformation

Developments in the Field of Rapid Prototype Production

2008 ◽  
Vol 589 ◽  
pp. 421-425 ◽  
Author(s):  
Norbert Krisztián Kovács ◽  
József Gábor Kovács
Keyword(s):  
Mechanical Strength ◽  
Porous Structure ◽  
Epoxy Resin ◽  
Rapid Prototype ◽  
Post Treatment ◽  
3D Printer ◽  
Infiltration Depth ◽  
3D Printed ◽  
The Common ◽  
Polymer Engineering

Characteristics of 3D printed specimens are porous structure and low mechanical strength. Due to porous structure post treatment is possible, and in most cases infiltration with an epoxy resin, wax or cyanoacrylate material takes place. As a result of post treatment, the mechanical strength can be increased by 100%, although this is strongly influenced by the infiltration depth that depends on the porous structure and the resin viscosity. In the framework of the common research of the Department of Polymer Engineering, BME and Varinex Zrt. the applicability of a 3D printer is examined in the field of direct tool making. As the first step, the resin uptake ability of specimens prepared with a Z810 3D printer is examined.

scholarly journals Is three-dimensional–printed custom-made ultra-short stem with a porous structure an acceptable reconstructive alternative in peri-knee metaphysis for the tumorous bone defect?

2021 ◽  
Vol 19 (1) ◽  
Author(s):  
Jie Wang ◽  
Jingjing An ◽  
Minxun Lu ◽  
Yuqi Zhang ◽  
Jingqi Lin ◽  
...  
Keyword(s):  
Porous Structure ◽  
Aseptic Loosening ◽  
Bone Defect ◽  
Short Stem ◽  
Leg Length ◽  
Musculoskeletal Tumor Society ◽  
Custom Made ◽  
Orthopedic Oncology ◽  
3D Printed

Abstract Background Long-lasting reconstruction after extensive resection involving peri-knee metaphysis is a challenging problem in orthopedic oncology. Various reconstruction methods have been proposed, but they are characterized by a high complication rate. The purposes of this study were to (1) assess osseointegration at the bone implant interface and correlated incidence of aseptic loosening; (2) identify complications including infection, endoprosthesis fracture, periprosthetic fracture, leg length discrepancy, and wound healing problem in this case series; and (3) evaluate the short-term function of the patient who received this personalized reconstruction system. Methods Between September 2016 and June 2018, our center treated 15 patients with malignancies arising in the femur or tibia shaft using endoprosthesis with a 3D-printed custom-made stem. Osseointegration and aseptic loosening were assessed with digital tomosynthesis. Complications were recorded by reviewing the patients’ records. The function was evaluated with the 1993 version of the Musculoskeletal Tumor Society (MSTS-93) score at a median of 42 (range, 34 to 54) months after reconstruction. Results One patient who experienced early aseptic loosening was managed with immobilization and bisphosphonates infusion. All implants were well osseointegrated at the final follow-up examination. There are two periprosthetic fractures intraoperatively. The wire was applied to assist fixation, and the fracture healed at the latest follow-up. Two patients experienced significant leg length discrepancies. The median MSTS-93 score was 26 (range, 23 to 30). Conclusions A 3D-printed custom-made ultra-short stem with a porous structure provides acceptable early outcomes in patients who received peri-knee metaphyseal reconstruction. With detailed preoperative design and precise intraoperative techniques, the reasonable initial stability benefits osseointegration to osteoconductive porous titanium, and therefore ensures short- and possibly long-term durability. Personalized adaptive endoprosthesis, careful intraoperative operation, and strict follow-up management enable effective prevention and treatment of complications. The functional results in our series were acceptable thanks to reliable fixation in the bone-endoprosthesis interface and an individualized rehabilitation program. These positive results indicate this device series can be a feasible alternative for critical bone defect reconstruction. Nevertheless, longer follow-up is required to determine whether this technique is superior to other forms of fixation.

Spatial-Gradient-Based Digital Volume Correlation Technique for Internal Deformation Measurement

2011 ◽  
Vol 31 (6) ◽  
pp. 0612005 ◽  
Author(s):  
潘兵 Pan Bing ◽  
吴大方 Wu Dafang ◽  
谢惠民 Xie Huimin ◽  
胡振兴 Hu Zhenxing
Keyword(s):  
Deformation Measurement ◽  
Digital Volume Correlation ◽  
Correlation Technique ◽  
Spatial Gradient ◽  
Gradient Based ◽  
Internal Deformation

scholarly journals Powder-Based 3D Printed Porous Structure and Its Application as Bone Scaffold

2020 ◽  
Vol 7 ◽  
Author(s):  
Yingchun Zhao ◽  
Yue Hou ◽  
Zhaoyu Li ◽  
Ziyu Wang ◽  
Xinxin Yan
Keyword(s):  
Porous Structure ◽  
Bone Scaffold ◽  
3D Printed

Internal Deformation Measurement of Polymer Bonded Sugar in Compression by Digital Volume Correlation of In-situ Tomography

2014 ◽  
Vol 55 (1) ◽  
pp. 289-300 ◽  
Author(s):  
Z. Hu ◽  
H. Luo ◽  
S. G. Bardenhagen ◽  
C. R. Siviour ◽  
R. W. Armstrong ◽  
...  
Keyword(s):  
Deformation Measurement ◽  
Digital Volume Correlation ◽  
Internal Deformation

scholarly journals Pomelo Peel-Inspired 3D-Printed Porous Structure for Efficient Absorption of Compressive Strain Energy

2022 ◽  
Author(s):  
Baisong Yang ◽  
Wenhui Chen ◽  
Renlong Xin ◽  
Xiaohong Zhou ◽  
Di Tan ◽  
...  
Keyword(s):  
Porous Structure ◽  
Deformation Behavior ◽  
Compressive Strain ◽  
High Energy ◽  
Pomelo Peel ◽  
Polyether Ether Ketone ◽  
Element Simulation ◽  
Quantitative Understanding ◽  
3D Printed ◽  
Free Falling

AbstractThe porous structure in pomelo peel is believed to be responsible for the protection of its fruit from damage during the free falling from a tree. The quantitative understanding of the relationship between the deformation behavior and the porous structure could pave the way for the design of porous structures for efficient energy absorption. Here, a universal feature of pore distribution in pomelo peels along the radial direction is extracted from three varieties of pomelos, which shows strong correlation to the deformation behavior of the peels under compression. Guided by the porous design found in pomelo peels, porous polyether-ether-ketone (PEEK) cube is additively manufactured and possesses the highest ability to absorb energy during compression as compared to the non-pomelo-inspired geometries, which is further confirmed by the finite element simulation. The nature-optimized porous structure revealed here could guide the design of lightweight and high-energy-dissipating materials/devices.

Effect of porous structure and pore size on mechanical strength of 3D-printed comby scaffolds

2018 ◽  
Vol 223 ◽  
pp. 21-24 ◽  
Author(s):  
Hongxia Zhao ◽  
Lihua Li ◽  
Shan Ding ◽  
Chenxing Liu ◽  
Jiaoyan Ai
Keyword(s):  
Mechanical Strength ◽  
Porous Structure ◽  
Pore Size ◽  
3D Printed

scholarly journals Effect of technical parameters on porous structure and strength of 3D printed calcium sulfate prototypes

2016 ◽  
Vol 37 ◽  
pp. 57-67 ◽  
Author(s):  
Mitra Asadi-Eydivand ◽  
Mehran Solati-Hashjin ◽  
Arghavan Farzad ◽  
Noor Azuan Abu Osman
Keyword(s):  
Porous Structure ◽  
Calcium Sulfate ◽  
Technical Parameters ◽  
3D Printed
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