open access

Vol 46, No 4 (2012)
ARTYKUŁ ORYGINALNY
Submitted: 2011-08-05
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Finite element method for analysis of stresses arising in the skull after external loading in cranio-orbital fractures

Hubert Wanyura, Piotr Kowalczyk, Maciej Bossak, Danuta Samolczyk-Wanyura, Zygmunt Stopa
DOI: 10.5114/ninp.2012.30267
·
Neurol Neurochir Pol 2012;46(4):344-350.

open access

Vol 46, No 4 (2012)
ARTYKUŁ ORYGINALNY
Submitted: 2011-08-05

Abstract

Background and purpose

The craniofacial skeleton remains not fully recognised as far as its mechanical resistance properties are concerned. Heretofore, the only available information on the mechanism of cranial bone fractures came from clinical observations, since the clinical evaluation in a living individual is practically impossible. It seems crucial to implement computer methods of virtual research into clinical practice. Such methods, which have long been used in the technical sciences, may either confirm or disprove previous observations. The aim of the study was to identify the areas of stress concentrations caused by external loads, which can lead to cranio-orbital fractures (COF), by the finite element method (FEM).

Material and methods

For numerical analysis, a three-dimensional commercially available geometrical model of the skull was used which was imported into software of FEM. Computations were performed with ANSYS 12.1 Static Structural module. The loads were applied laterally to the frontal squama, the zygomatic process and partly to the upper orbital rim to locate dangerous concentration of stresses potentially resulting in COF.

Results

Changes in the area of force application revealed differences in values, quality and the extent of the stress distribution. Depending on the area of force application the following parameters would change: the value and area of stresses characteristic of COF.

Conclusion

The distribution of stresses obtained in this study allowed definition of both the locations most vulnerable to fracture and sites from which fractures may originate or propagate.

Abstract

Background and purpose

The craniofacial skeleton remains not fully recognised as far as its mechanical resistance properties are concerned. Heretofore, the only available information on the mechanism of cranial bone fractures came from clinical observations, since the clinical evaluation in a living individual is practically impossible. It seems crucial to implement computer methods of virtual research into clinical practice. Such methods, which have long been used in the technical sciences, may either confirm or disprove previous observations. The aim of the study was to identify the areas of stress concentrations caused by external loads, which can lead to cranio-orbital fractures (COF), by the finite element method (FEM).

Material and methods

For numerical analysis, a three-dimensional commercially available geometrical model of the skull was used which was imported into software of FEM. Computations were performed with ANSYS 12.1 Static Structural module. The loads were applied laterally to the frontal squama, the zygomatic process and partly to the upper orbital rim to locate dangerous concentration of stresses potentially resulting in COF.

Results

Changes in the area of force application revealed differences in values, quality and the extent of the stress distribution. Depending on the area of force application the following parameters would change: the value and area of stresses characteristic of COF.

Conclusion

The distribution of stresses obtained in this study allowed definition of both the locations most vulnerable to fracture and sites from which fractures may originate or propagate.

Get Citation

Keywords

cranio-orbital fractures, maximal stresses of skull, finite element method

About this article
Title

Finite element method for analysis of stresses arising in the skull after external loading in cranio-orbital fractures

Journal

Neurologia i Neurochirurgia Polska

Issue

Vol 46, No 4 (2012)

Pages

344-350

DOI

10.5114/ninp.2012.30267

Bibliographic record

Neurol Neurochir Pol 2012;46(4):344-350.

Keywords

cranio-orbital fractures
maximal stresses of skull
finite element method

Authors

Hubert Wanyura
Piotr Kowalczyk
Maciej Bossak
Danuta Samolczyk-Wanyura
Zygmunt Stopa

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