Mechanical properties of individual trabeculae in a physiological environment

Martin Frank, Dorothee Marx, Dieter H. Pahr, Philipp J. Thurner

Publikation: Beitrag in Buch/Bericht/KonferenzbandBeitrag in Konferenzband

13 Zitate (Scopus)

Abstract

Reliable mechanical properties of trabecuale are needed at the tissue-level for prediction of mechanical behavior of the overall trabecular structure using Finite element analysis (FEA). The aim of this study was to develop a set-up to test trabeculae in tension in a close to physiological environment, and to determine reliable tissue-level properties. Ten bovine trabeculae were tested until failure. Tissue-stress can only be indirectly determined, since it is based on a defined cross-sectional area. Different geometrical assumptions for the cross-section were compared. The mean tissue Youngs modulus, based on the assumption of an elliptical cross-sectional area, was 9.9 ± 3.4GPa, the mean tissue ultimate tissue strain 9.8 ± 3.9%. Back-calculation of the tissue Youngs modulus by means of FEA illustrated a significant reduction to 8.2 ± 2.4GPa (p < 0.001). However, with simple geometric assumptions, it is possible to estimate a reasonable upper and lower boundary for the tissue Young's modulus. Full-field strain measurements were done to detect localization of strain. It was shown that local strain peaks occur already early after yielding, with a local strain at fracture of 19.7 ± 6.6%. These findings clearly show that individual trabeculae can withstand much higher tissue strains as previously reported.

OriginalspracheEnglisch
TitelProceedings of the 13th IASTED International Conference on Biomedical Engineering, BioMed 2017
Redakteur:innenRita Kiss, Philipp J. Thurner
Herausgeber (Verlag)Institute of Electrical and Electronics Engineers Inc.
Seiten141-146
Seitenumfang6
ISBN (elektronisch)9780889869905
DOIs
PublikationsstatusVeröffentlicht - 05 Apr. 2017
Extern publiziertJa
Veranstaltung13th IASTED International Conference on Biomedical Engineering, BioMed 2017 - Innsbruck, Österreich
Dauer: 20 Feb. 201721 Feb. 2017

Publikationsreihe

NameProceedings of the 13th IASTED International Conference on Biomedical Engineering, BioMed 2017

Konferenz

Konferenz13th IASTED International Conference on Biomedical Engineering, BioMed 2017
Land/GebietÖsterreich
OrtInnsbruck
Zeitraum20.02.201721.02.2017

ASJC Scopus Sachgebiete

  • Biomedizintechnik

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