scholarly journals Retraction Note: 3D printing of surface characterization and finite element analysis improvement of PEEK-HAP-GO in bone implant

2021 ◽  
Author(s):  
Bankole I. Oladapo ◽  
S. Abolfazl Zahedi ◽  
Seng Chong ◽  
Francis T. Omigbodun ◽  
Idowu O. Malachi
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
3D Printing ◽  
Surface Characterization ◽  
Element Analysis ◽  
Bone Implant

scholarly journals 3D printing of surface characterisation and finite element analysis improvement of PEEK-HAP-GO in bone implant

2019 ◽  
Vol 106 (3-4) ◽  
pp. 829-841 ◽  
Author(s):  
Bankole I. Oladapo ◽  
S. Abolfazl Zahedi ◽  
Seng Chong ◽  
Francis T. Omigbodun ◽  
Idowu O. Malachi
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
3D Printing ◽  
Surface Characterisation ◽  
Element Analysis ◽  
Bone Implant

scholarly journals Effects of Nozzle Die Angle on Extruding Polymethylmethacrylate in Open-Source 3D Printing

2018 ◽  
Vol 15 (2) ◽  
pp. 663-665 ◽  
Author(s):  
Nor Aiman Sukindar ◽  
Mohd Khairol Anuar Mohd Ariffin ◽  
B.T. Hang Tuah Baharudin ◽  
Che Nor Aiza Jaafar ◽  
Mohd Idris Shah Ismail
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Pressure Drop ◽  
3D Printing ◽  
Open Source ◽  
Flow Behavior ◽  
Three Dimensional ◽  
3D Printer ◽  
Element Analysis ◽  
Factors Affecting

Open-source 3D printer has been widely used for fabricating three dimensional products. However, this technology has some drawbacks that need to be improved such as accuracy of the finished parts. One of the factors affecting the final product is the ability of the machine to extrude the material consistently, which is related to the flow behavior of the material inside the liquefier. This paper observes the pressure drop along the liquefier by manipulating the nozzle die angle from 80° to 170° using finite element analysis (FEA) for polymethylmethacrylate (PMMA) material. When the pressure drop along the liquefier is varied, the printed product also varies, thus providing less accuracy in the finished parts. Based on the FEA, it was found that 130° was the optimum die angle (convergent angle) for extruding PMMA material using open-source 3D printing.

scholarly journals Development of a Computer-Aided Design and Finite Element Analysis Combined Method for Affordable Spine Surgical Navigation With 3D-Printed Customized Template

2021 ◽  
Vol 7 ◽  
Author(s):  
Peter Endre Eltes ◽  
Marton Bartos ◽  
Benjamin Hajnal ◽  
Agoston Jakab Pokorni ◽  
Laszlo Kiss ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
3D Printing ◽  
Surgical Technique ◽  
Pedicle Screw ◽  
Physical Model ◽  
Investment Casting ◽  
Surgical Navigation ◽  
Patient Specific ◽  
Element Analysis

Introduction: Revision surgery of a previous lumbosacral non-union is highly challenging, especially in case of complications, such as a broken screw at the first sacral level (S1). Here, we propose the implementation of a new method based on the CT scan of a clinical case using 3D reconstruction, combined with finite element analysis (FEA), computer-assisted design (CAD), and 3D-printing technology to provide accurate surgical navigation to aid the surgeon in performing the optimal surgical technique by inserting a pedicle screw at the S1 level.Materials and Methods: A step-by-step approach was developed and performed as follows: (1) Quantitative CT based patient-specific FE model of the sacrum was created. (2) The CAD model of the pedicle screw was inserted into the sacrum model in a bicortical convergent and a monocortical divergent position, by overcoming the geometrical difficulty caused by the broken screw. (3) Static FEAs (Abaqus, Dassault Systemes) were performed using 500 N tensile load applied to the screw head. (4) A template with two screw guiding structures for the sacrum was designed and manufactured using CAD design and 3D-printing technologies, and investment casting. (5) The proposed surgical technique was performed on the patient-specific physical model created with the FDM printing technology. The patient-specific model was CT scanned and a comparison with the virtual plan was performed to evaluate the template accuracyResults: FEA results proved that the modified bicortical convergent insertion is stiffer (6,617.23 N/mm) compared to monocortical divergent placement (2,989.07 N/mm). The final template was created via investment casting from cobalt-chrome. The template design concept was shown to be accurate (grade A, Gertzbein-Robbins scale) based on the comparison of the simulated surgery using the patient-specific physical model and the 3D virtual surgical plan.Conclusion: Compared to the conventional surgical navigation techniques, the presented method allows the consideration of the patient-specific biomechanical parameters; is more affordable, and the intraoperative X-ray exposure can be reduced. This new patient- and condition-specific approach may be widely used in revision spine surgeries or in challenging primary cases after its further clinical validation.

Effect of fracture levels on the strength of bone-implant constructs in subtrochanteric fracture models fixed using short cephalomedullary nails: A finite element analysis

Injury ◽  
2019 ◽  
Vol 50 (11) ◽  
pp. 1883-1888 ◽  
Author(s):  
Chul-Young Jang ◽  
Sun-Hee Bang ◽  
Won-Hyeon Kim ◽  
Sung-Jae Lee ◽  
Hyung-Min Lee ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Subtrochanteric Fracture ◽  
Element Analysis ◽  
Bone Implant ◽  
Fracture Models ◽  
Cephalomedullary Nails
Sign in / Sign up

Export Citation Format

Share Document