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Finite element analysis of idealised unit cell cancellous structure based on morphological indices of cancellous bone

Human bones can be categorised into one of two types—the compact cortical and the porous cancellous. Whilst the cortical is a solid structure macroscopically, the structure of cancellous bone is highly complex with plate-like and strut-like structures of various sizes and shapes depending on the ana...

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Main Authors: Abdul Kadir, Mohammed Rafiq, Ochsner, Andreas, A., Syahrom
Format: Article
Published: Springer Berlin / Heidelberg 2010
Subjects:
TJ Mechanical engineering and machinery
Online Access:http://eprints.utm.my/id/eprint/26182/
http://dx.doi.org/10.1007/s11517-010-0593-2
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spelling my.utm.261822018-10-31T12:20:19Z http://eprints.utm.my/id/eprint/26182/ Finite element analysis of idealised unit cell cancellous structure based on morphological indices of cancellous bone Abdul Kadir, Mohammed Rafiq Ochsner, Andreas A., Syahrom TJ Mechanical engineering and machinery Human bones can be categorised into one of two types—the compact cortical and the porous cancellous. Whilst the cortical is a solid structure macroscopically, the structure of cancellous bone is highly complex with plate-like and strut-like structures of various sizes and shapes depending on the anatomical site. Reconstructing the actual structure of cancellous bone for defect filling is highly unfeasible. However, the complex structure can be simplified into an idealised structure with similar properties. In this study, two idealised architectures were developed based on morphological indices of cancellous bone: the tetrakaidecahedral and the prismatic. The two architectures were further subdivided into two types of microstructure, the first consists of struts only and the second consists of a combination of plates and struts. The microstructures were transformed into finite element models and displacement boundary condition was applied to all four idealised cancellous models with periodic boundary conditions. Eight unit cells extracted from the actual cancellous bone obtained from micro-computed tomography were also analysed with the same boundary conditions. Young’s modulus values were calculated and comparison was made between the idealised and real cancellous structures. Results showed that all models with a combination of plates and struts have higher rigidity compared to the one with struts only. Values of Young’s modulus from eight unit cells of cancellous bone varied from 42 to 479 MPa with an average of 234 MPa. The prismatic architecture with plates and rods closely resemble the average stiffness of a unit cell of cancellous bone. Springer Berlin / Heidelberg 2010 Article PeerReviewed Abdul Kadir, Mohammed Rafiq and Ochsner, Andreas and A., Syahrom (2010) Finite element analysis of idealised unit cell cancellous structure based on morphological indices of cancellous bone. Medical & Biological Engineering & Computing, 48 (5). 497 - 505. ISSN 0140-0118 http://dx.doi.org/10.1007/s11517-010-0593-2 DOI:10.1007/s11517-010-0593-2
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
topic TJ Mechanical engineering and machinery
spellingShingle TJ Mechanical engineering and machinery
Abdul Kadir, Mohammed Rafiq
Ochsner, Andreas
A., Syahrom
Finite element analysis of idealised unit cell cancellous structure based on morphological indices of cancellous bone
description Human bones can be categorised into one of two types—the compact cortical and the porous cancellous. Whilst the cortical is a solid structure macroscopically, the structure of cancellous bone is highly complex with plate-like and strut-like structures of various sizes and shapes depending on the anatomical site. Reconstructing the actual structure of cancellous bone for defect filling is highly unfeasible. However, the complex structure can be simplified into an idealised structure with similar properties. In this study, two idealised architectures were developed based on morphological indices of cancellous bone: the tetrakaidecahedral and the prismatic. The two architectures were further subdivided into two types of microstructure, the first consists of struts only and the second consists of a combination of plates and struts. The microstructures were transformed into finite element models and displacement boundary condition was applied to all four idealised cancellous models with periodic boundary conditions. Eight unit cells extracted from the actual cancellous bone obtained from micro-computed tomography were also analysed with the same boundary conditions. Young’s modulus values were calculated and comparison was made between the idealised and real cancellous structures. Results showed that all models with a combination of plates and struts have higher rigidity compared to the one with struts only. Values of Young’s modulus from eight unit cells of cancellous bone varied from 42 to 479 MPa with an average of 234 MPa. The prismatic architecture with plates and rods closely resemble the average stiffness of a unit cell of cancellous bone.
format Article
author Abdul Kadir, Mohammed Rafiq
Ochsner, Andreas
A., Syahrom
author_facet Abdul Kadir, Mohammed Rafiq
Ochsner, Andreas
A., Syahrom
author_sort Abdul Kadir, Mohammed Rafiq
title Finite element analysis of idealised unit cell cancellous structure based on morphological indices of cancellous bone
title_short Finite element analysis of idealised unit cell cancellous structure based on morphological indices of cancellous bone
title_full Finite element analysis of idealised unit cell cancellous structure based on morphological indices of cancellous bone
title_fullStr Finite element analysis of idealised unit cell cancellous structure based on morphological indices of cancellous bone
title_full_unstemmed Finite element analysis of idealised unit cell cancellous structure based on morphological indices of cancellous bone
title_sort finite element analysis of idealised unit cell cancellous structure based on morphological indices of cancellous bone
publisher Springer Berlin / Heidelberg
publishDate 2010
url http://eprints.utm.my/id/eprint/26182/
http://dx.doi.org/10.1007/s11517-010-0593-2
_version_ 1643647703321673728
score 13.211869

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