Numerische Betrachtung der biomechanischen Komplikationen begleitend zur Totalhüftgelenkprothese

Knochenumbau und Prothesenmigration

verfasst von: B. A. Behrens, A. Bouguecha, M. Vucetic, S. Betancur Escobar, C. Stukenborg-Colsman, M. Lerch, I. Nolte, A. Almohallami
Abstract: Aseptic loosening of the prosthesis is still a problem in artificial joint implants. The loosening can be caused by, among other factors, resorption of the bone surrounding the prosthesis owing to stress shielding. A numerical model was developed at the Institute of Forming Technology and Machines, Leibniz Universität Hannover, in order to anticipate the bone remodelling process according to the stress shielding. This study is carried out to validate this model by means of DEXA- as well as CT-clinical studies on patients with different kinds of prostheses and use it to map the cup migration. The model was applied to the periprosthetic femur and pelvis. In both cases it shows very good results. With a mean difference of 12% in case of the femur and 6.8% in case of the pelvis the numerical bone remodelling model is successfully validated. A new method is developed to map the prosthetic migration in the pelvis. Using mechanical relationships and remeshing regulations the finite-element-analysis (FEA) calculates the possible migration of the cup in pelvis. This method was applied to polyethylene cup and showed good results in comparison with a clinical study. In order to increase the accuracy of the numerical model, the difference in hip contact forces caused by the migration of the cup is calculated by multi body simulation and embedded in the FEA using online coupling software developed by our scientific group.
Organisationseinheit(en): Institut für Umformtechnik und Umformmaschinen
Externe Organisation(en): Medizinische Hochschule Hannover (MHH)
Stiftung Tierärztliche Hochschule Hannover
Typ: Artikel
Journal: Materialwissenschaft und Werkstofftechnik
Band: 46
Seiten: 881-893
Anzahl der Seiten: 13
ISSN: 0933-5137
Publikationsdatum: 01.09.2015
Publikationsstatus: Veröffentlicht
Peer-reviewed: Ja
ASJC Scopus Sachgebiete: Allgemeine Materialwissenschaften, Physik der kondensierten Materie, Werkstoffmechanik, Maschinenbau
Elektronische Version(en): https://doi.org/10.1002/mawe.201500395 (Zugang: Geschlossen)
: Details im Forschungsportal „Research@Leibniz University“

BibTeX

@article{13284bc7fc7d470d8a9160cd7a065e95,
title = "Numerische Betrachtung der biomechanischen Komplikationen begleitend zur Totalh{\"u}ftgelenkprothese: Knochenumbau und Prothesenmigration",
abstract = "Aseptic loosening of the prosthesis is still a problem in artificial joint implants. The loosening can be caused by, among other factors, resorption of the bone surrounding the prosthesis owing to stress shielding. A numerical model was developed at the Institute of Forming Technology and Machines, Leibniz Universit{\"a}t Hannover, in order to anticipate the bone remodelling process according to the stress shielding. This study is carried out to validate this model by means of DEXA- as well as CT-clinical studies on patients with different kinds of prostheses and use it to map the cup migration. The model was applied to the periprosthetic femur and pelvis. In both cases it shows very good results. With a mean difference of 12% in case of the femur and 6.8% in case of the pelvis the numerical bone remodelling model is successfully validated. A new method is developed to map the prosthetic migration in the pelvis. Using mechanical relationships and remeshing regulations the finite-element-analysis (FEA) calculates the possible migration of the cup in pelvis. This method was applied to polyethylene cup and showed good results in comparison with a clinical study. In order to increase the accuracy of the numerical model, the difference in hip contact forces caused by the migration of the cup is calculated by multi body simulation and embedded in the FEA using online coupling software developed by our scientific group.",
keywords = "Bone remodelling, cup migration, DEXA, Finite-Element-Analysis, multi body simulation, validation",
author = "Behrens, {B. A.} and A. Bouguecha and M. Vucetic and {Betancur Escobar}, S. and C. Stukenborg-Colsman and M. Lerch and I. Nolte and A. Almohallami",
year = "2015",
month = sep,
day = "1",
doi = "10.1002/mawe.201500395",
language = "Deutsch",
volume = "46",
pages = "881--893",
journal = "Materialwissenschaft und Werkstofftechnik",
issn = "0933-5137",
publisher = "Wiley-VCH Verlag",
number = "9",
}