Influence of Assumed Boundary Conditions Derived from MBS on Numerically Simulated Strain-Adaptive Bone Remodeling in the Pelvis after Total Hip Replacement

authored by: A. Bouguecha, N. Weigel, S. Betancur Escobar, I. Nolte, P. Wefstaedt, C. Stukenborg-Colsman, B. A. Behrens
Abstract: Total hip replacement (THR) is a routine procedure mostly used for the treatment of primary osteoarthrosis of the hip joint. Despite good clinical results aseptic loosening caused by strain-adaptive remodeling processes of bone tissue is the main cause for failure of the implant. As a consequence the migration of the cup can be significant [1]. The presented study is an extension of our previous research work, where remodeling processes were already calculated in the prosthetic pelvis using a static load case [2]. In the present study the same finite element (FE) model has been used but the hip joint forces were derived from the multi-body simulation (MBS) of the gait cycle of a human test subject with normal walking speed. Hence, a more realistic load case is used which is supposed to affect the simulation result. This is due to our investigations in the femur [3], where a significant different simulation result for the bone mass loss has been computed comparing static load cases and the more realistic loads applied from a study of Bergmann et al. [4]. The comparison of the simulation result of the static and the dynamic load cases confirms the assumptions of a lower decrease of the average bone density in the pelvis with the dynamic load case. Furthermore, a variation in the resorption area is determined as well. On the basis of the final density distribution in the acetabulum the loading situation of a migrated prosthesis should be determined with the MBS model to estimate the influence of the cup position on the hip resultant.
Organisation(s): Institute of Metal Forming and Metal Forming Machines
External Organisation(s): University of Veterinary Medicine of Hannover, Foundation
Hannover Medical School (MHH)
Type: Article
Journal: IFMBE Proceedings
Volume: 37
Pages: 339-342
No. of pages: 4
ISSN: 1680-0737
Publication date: 09.11.2011
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Bioengineering, Biomedical Engineering
Electronic version(s): https://doi.org/10.1007/978-3-642-23508-5_88 (Access: Unknown)
: Details in the research portal "Research@Leibniz University"

BibTeX

@article{5b4e8b19f5c748c98ac7585c8c8908a1,
title = "Influence of Assumed Boundary Conditions Derived from MBS on Numerically Simulated Strain-Adaptive Bone Remodeling in the Pelvis after Total Hip Replacement",
abstract = "Total hip replacement (THR) is a routine procedure mostly used for the treatment of primary osteoarthrosis of the hip joint. Despite good clinical results aseptic loosening caused by strain-adaptive remodeling processes of bone tissue is the main cause for failure of the implant. As a consequence the migration of the cup can be significant [1]. The presented study is an extension of our previous research work, where remodeling processes were already calculated in the prosthetic pelvis using a static load case [2]. In the present study the same finite element (FE) model has been used but the hip joint forces were derived from the multi-body simulation (MBS) of the gait cycle of a human test subject with normal walking speed. Hence, a more realistic load case is used which is supposed to affect the simulation result. This is due to our investigations in the femur [3], where a significant different simulation result for the bone mass loss has been computed comparing static load cases and the more realistic loads applied from a study of Bergmann et al. [4]. The comparison of the simulation result of the static and the dynamic load cases confirms the assumptions of a lower decrease of the average bone density in the pelvis with the dynamic load case. Furthermore, a variation in the resorption area is determined as well. On the basis of the final density distribution in the acetabulum the loading situation of a migrated prosthesis should be determined with the MBS model to estimate the influence of the cup position on the hip resultant.",
keywords = "bone remodeling, cemented cup, finite element method (FEM), multi-body simulation (MBS)",
author = "A. Bouguecha and N. Weigel and Escobar, {S. Betancur} and I. Nolte and P. Wefstaedt and C. Stukenborg-Colsman and Behrens, {B. A.}",
year = "2011",
month = nov,
day = "9",
doi = "10.1007/978-3-642-23508-5_88",
language = "English",
volume = "37",
pages = "339--342",
journal = "IFMBE Proceedings",
issn = "1680-0737",
publisher = "Springer Verlag",
}