Details
| Original language | English |
|---|---|
| Pages (from-to) | 339-342 |
| Number of pages | 4 |
| Journal | IFMBE Proceedings |
| Volume | 37 |
| Publication status | Published - 9 Nov 2011 |
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)
ASJC Scopus subject areas
- Chemical Engineering(all)
- Bioengineering
- Engineering(all)
- Biomedical Engineering
Cite this
- Standard
- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
In: IFMBE Proceedings, Vol. 37, 09.11.2011, p. 339-342.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Influence of Assumed Boundary Conditions Derived from MBS on Numerically Simulated Strain-Adaptive Bone Remodeling in the Pelvis after Total Hip Replacement
AU - Bouguecha, A.
AU - Weigel, N.
AU - Escobar, S. Betancur
AU - Nolte, I.
AU - Wefstaedt, P.
AU - Stukenborg-Colsman, C.
AU - Behrens, B. A.
PY - 2011/11/9
Y1 - 2011/11/9
N2 - 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.
AB - 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.
KW - bone remodeling
KW - cemented cup
KW - finite element method (FEM)
KW - multi-body simulation (MBS)
UR - http://www.scopus.com/inward/record.url?scp=80455168642&partnerID=8YFLogxK
U2 - 10.1007/978-3-642-23508-5_88
DO - 10.1007/978-3-642-23508-5_88
M3 - Article
AN - SCOPUS:80455168642
VL - 37
SP - 339
EP - 342
JO - IFMBE Proceedings
JF - IFMBE Proceedings
SN - 1680-0737
ER -