The Analysis with Finite Elements of the Elasto-plastic Behaviour of the Spinal Immobilizers - in the Case of Comminutive Fractures

Toma, Bogdan Florin; Nanu, Constantin; Popescu, Cezar; Socolov, Razvan Vladimir; Rosu, Vasile-Eduard; Toma, Stefan Lucian; Himiniuc, Loredana Maria; Rosu, Solange Tamara

Bogdan Florin Toma, Constantin Nanu, Cezar Popescu, Razvan Vladimir Socolov, Vasile-Eduard Rosu, Stefan Lucian Toma, Loredana Maria Himiniuc, Solange Tamara Rosu

The Analysis with Finite Elements of the Elasto-plastic Behaviour of the Spinal Immobilizers - in the Case of Comminutive Fractures

Abstract:
In this paper it is presented a comparative theoretical study - performed by finite element analysis (FEA), of the tension state that appears at the level of the spine, as well as in the areas adjacent to it, under the following conditions: a) the existence of a comminutive fracture at the level of the vertebra T11; b) of the external immobilization of the body through a Lombax orthesis (LO) or of the internal immobilization of the column by means of a spinal fixator (SF); c) of performing some basic flexion or extension movements. In this study, both flexural force and extension force varied on three levels. The results of the comparative theoretical study were supplemented with the clinical observations obtained from a number of 52 patients who had suffered comminutive fractures in the T11 vertebra and who were treated - by external immobilization, in the Lombax orthesis or were surgically treated - by applying a trapped spinal fixator on the T10-T12 vertebrae. The study had demonstrated that, by immobilizing the body in the Lombax orthesis, following the application of the flexion or extension movement, the mobility of the body is low, the bone fragments move less distances by about 12% against to their displacement under the condition of immobilizing the column by a spinal fixator. Although, in the latter case, the displacements of the bone fragments are greater, the elastic behaviour of the spinal fixator determines the returning of the fragments and of the spine to the initial position as well as the distance between the vertebrae. Clinical investigations on patients treated by external immobilization of the body in the Lombax orthesis show that the values of the local kyphosis angle (LKA) are about 30% lower than the values of the same parameter obtained under the surgical treatment.

Keywords:
Spine; Lombax orthesis; internal fixator; finite element

Issue: 2020 Volume 57, Issue 2

Pages: 253-264

Publication date: 2019/7/1

https://doi.org/10.37358/MP.20.2.5371

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This article is published under the Creative Commons Attribution 4.0 International License

Citation Styles

Cite this article as:
TOMA, B.F., NANU, C., POPESCU, C., SOCOLOV, R.V., ROSU, V., TOMA, S.L., HIMINIUC, L.M., ROSU, S.T., The Analysis with Finite Elements of the Elasto-plastic Behaviour of the Spinal Immobilizers - in the Case of Comminutive Fractures, Mater. Plast., 57(2), 2020, 253-264. https://doi.org/10.37358/MP.20.2.5371

Vancouver
Toma BF, Nanu C, Popescu C, Socolov RV, Rosu V, Toma SL, Himiniuc LM, Rosu ST. The Analysis with Finite Elements of the Elasto-plastic Behaviour of the Spinal Immobilizers - in the Case of Comminutive Fractures. Mater. Plast.[internet]. 2020 Apr;57(2):253-264. Available from: https://doi.org/10.37358/MP.20.2.5371

APA 6th edition
Toma, B.F., Nanu, C., Popescu, C., Socolov, R.V., Rosu, V., Toma, S.L., Himiniuc, L.M. & Rosu, S.T. (2020). The Analysis with Finite Elements of the Elasto-plastic Behaviour of the Spinal Immobilizers - in the Case of Comminutive Fractures. Materiale Plastice, 57(2), 253-264. https://doi.org/10.37358/MP.20.2.5371

Harvard
Toma, B.F., Nanu, C., Popescu, C., Socolov, R.V., Rosu, V., Toma, S.L., Himiniuc, L.M., Rosu, S.T. (2020). 'The Analysis with Finite Elements of the Elasto-plastic Behaviour of the Spinal Immobilizers - in the Case of Comminutive Fractures', Materiale Plastice, 57(2), pp. 253-264. https://doi.org/10.37358/MP.20.2.5371

IEEE
B.F. Toma, C. Nanu, C. Popescu, R.V. Socolov, V. Rosu, S.L. Toma, L.M. Himiniuc, S.T. Rosu, "The Analysis with Finite Elements of the Elasto-plastic Behaviour of the Spinal Immobilizers - in the Case of Comminutive Fractures". Materiale Plastice, vol. 57, no. 2, pp. 253-264, 2020. [online]. https://doi.org/10.37358/MP.20.2.5371

Text
Bogdan Florin Toma, Constantin Nanu, Cezar Popescu, Razvan Vladimir Socolov, Vasile-Eduard Rosu, Stefan Lucian Toma, Loredana Maria Himiniuc, Solange Tamara Rosu,
The Analysis with Finite Elements of the Elasto-plastic Behaviour of the Spinal Immobilizers - in the Case of Comminutive Fractures,
Materiale Plastice,
Volume 57, Issue 2,
2020,
Pages 253-264,
ISSN 2668-8220,
https://doi.org/10.37358/MP.20.2.5371.
(https://revmaterialeplastice.ro/Articles.asp?ID=5371)
Keywords: Spine; Lombax orthesis; internal fixator; finite element

RIS
TY - JOUR
T1 - The Analysis with Finite Elements of the Elasto-plastic Behaviour of the Spinal Immobilizers - in the Case of Comminutive Fractures
A1 - Toma, Bogdan Florin
A2 - Nanu, Constantin
A3 - Popescu, Cezar
A4 - Socolov, Razvan Vladimir
A5 - Rosu, Vasile-Eduard
A6 - Toma, Stefan Lucian
A7 - Himiniuc, Loredana Maria
A8 - Rosu, Solange Tamara
JF - Materiale Plastice
JO - Mater. Plast.
PB - Materiale Plastice SRL
SN - 2668-8220
Y1 - 2020
VL - 57
IS - 2
SP - 253
EP - 264
UR - https://doi.org/10.37358/MP.20.2.5371
KW - Spine
KW - Lombax orthesis
KW - internal fixator
KW - finite element
ER -

BibTex
@article{MatPlast2020P253,
author = {Toma Bogdan Florin and Nanu Constantin and Popescu Cezar and Socolov Razvan Vladimir and Rosu Vasile-Eduard and Toma Stefan Lucian and Himiniuc Loredana Maria and Rosu Solange Tamara},
title = {The Analysis with Finite Elements of the Elasto-plastic Behaviour of the Spinal Immobilizers - in the Case of Comminutive Fractures},
journal = {Materiale Plastice},
volume = {57},
number = {2},
pages = {253-264},
year = {2020},
issn = {2668-8220},
doi = {https://doi.org/10.37358/MP.20.2.5371},
url = {https://revmaterialeplastice.ro/Articles.asp?ID=5371}
}

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