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Non-standard bone simulation : interactive numerical analysis by computational steering
Publikationstyp
Journal Article
Date Issued
2011
Sprache
English
Author(s)
Yang, Zhengxiong
Ruess, Martin
Garcia, Eduardo Grande
Volume
14
Issue
5
Start Page
207
End Page
216
Citation
Computing and Visualization in Science 14 (5): 207-216 (2011)
Publisher DOI
Scopus ID
Publisher
Springer
Numerous numerical methods have been developed in an effort to accurately predict stresses in bones. The largest group are variants of the h-version of the finite element method (h-FEM), where low order Ansatz functions are used. By contrast, we3 investigate a combination of high order FEM and a fictitious domain approach, the finite cell method (FCM). While the FCM has been verified and validated in previous publications, this article proposes methods on how the FCM can be made computationally efficient to the extent that it can be used for patient specific, interactive bone simulations. This approach is called computa- tional steering and allows to change input parameters like the position of an implant, material or loads and leads to an almost instantaneous change in the output (stress lines, deformations). This direct feedback gives the user an immediate impression of the impact of his actions to an extent which, otherwise, is hard to obtain by the use of classical non interactive computations. Specifically, we investigate an application to pre-surgical planning of a total hip replacement where it is desirable to select an optimal implant for a specific patient. Herein, optimal is meant in the sense that the expected postoperative stress distribution in the bone closely resembles that before the operation. © 2011 Springer Science+Business Media, LLC.
Subjects
Computational steering
Finite cell method
Surgical planning
Total hip replacement
DDC Class
610: Medicine, Health