Functionality Evaluation of a Novel Smart Expandable Pedicle Screw to Mitigate Osteoporosis Effect in Bone Fixation : Modeling and Experimentation
Joint Authors
Eshghinejad, Ahmadreza
Goel, Vijay K.
Elahinia, Mohammad
Source
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2013-06-06
Country of Publication
Egypt
No. of Pages
8
Main Subjects
Engineering Sciences and Information Technology
Abstract EN
This paper proposes a novel expandable-retractable pedicle screw and analyzes its functionality.
A specially designed pedicle screw is described which has the ability to expand and retract using nitinol elements.
The screw is designed to expand in body temperature and retract by cooling the screw.
This expansion-retraction function is verified in an experiment designed in larger scale using a nitinol antagonistic assembly.
The results of this experiment are compared to the results of a finite element model developed in Abaqus in combination with a user material subroutine (UMAT).
This code has been developed to analyze the nonlinear thermomechanical behavior of shape memory alloy materials.
The functionality of the proposed screw is evaluated with simulation and experimentation in a pullout test as well.
The pullout force of a normal screw inserted in a normal bone was simulated, and the result is compared with the results of the expandable screw in osteoporotic bone.
Lastly, strength of the designed pedicle screw in a foam block is also verified with experiment.
The reported finite element simulations and experiments are the proof for the concept of nitinol expandable-retractable elements on a pedicle screw which validate the functionality in a pullout test.
American Psychological Association (APA)
Eshghinejad, Ahmadreza& Elahinia, Mohammad& Goel, Vijay K.. 2013. Functionality Evaluation of a Novel Smart Expandable Pedicle Screw to Mitigate Osteoporosis Effect in Bone Fixation : Modeling and Experimentation. Smart Materials Research،Vol. 2013, no. 2013, pp.1-8.
https://search.emarefa.net/detail/BIM-502387
Modern Language Association (MLA)
Eshghinejad, Ahmadreza…[et al.]. Functionality Evaluation of a Novel Smart Expandable Pedicle Screw to Mitigate Osteoporosis Effect in Bone Fixation : Modeling and Experimentation. Smart Materials Research No. 2013 (2013), pp.1-8.
https://search.emarefa.net/detail/BIM-502387
American Medical Association (AMA)
Eshghinejad, Ahmadreza& Elahinia, Mohammad& Goel, Vijay K.. Functionality Evaluation of a Novel Smart Expandable Pedicle Screw to Mitigate Osteoporosis Effect in Bone Fixation : Modeling and Experimentation. Smart Materials Research. 2013. Vol. 2013, no. 2013, pp.1-8.
https://search.emarefa.net/detail/BIM-502387
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-502387