Multi-body simulation of a canine hind limb

model development, experimental validation and calculation of ground reaction forces

verfasst von

Gabriele Helms, Bernd-Arno Behrens, Martin Stolorz, Patrick Wefstaedt, Ingo Nolte

Abstract

BACKGROUND: Among other causes the long-term result of hip prostheses in dogs is determined by aseptic loosening. A prevention of prosthesis complications can be achieved by an optimization of the tribological system which finally results in improved implant duration. In this context a computerized model for the calculation of hip joint loadings during different motions would be of benefit. In a first step in the development of such an inverse dynamic multi-body simulation (MBS-) model we here present the setup of a canine hind limb model applicable for the calculation of ground reaction forces.

METHODS: The anatomical geometries of the MBS-model have been established using computer tomography- (CT-) and magnetic resonance imaging- (MRI-) data. The CT-data were collected from the pelvis, femora, tibiae and pads of a mixed-breed adult dog. Geometric information about 22 muscles of the pelvic extremity of 4 mixed-breed adult dogs was determined using MRI. Kinematic and kinetic data obtained by motion analysis of a clinically healthy dog during a gait cycle (1 m/s) on an instrumented treadmill were used to drive the model in the multi-body simulation.

RESULTS AND DISCUSSION: As a result the vertical ground reaction forces (z-direction) calculated by the MBS-system show a maximum deviation of 1.75%BW for the left and 4.65%BW for the right hind limb from the treadmill measurements. The calculated peak ground reaction forces in z- and y-direction were found to be comparable to the treadmill measurements, whereas the curve characteristics of the forces in y-direction were not in complete alignment.

CONCLUSION: In conclusion, it could be demonstrated that the developed MBS-model is suitable for simulating ground reaction forces of dogs during walking. In forthcoming investigations the model will be developed further for the calculation of forces and moments acting on the hip joint during different movements, which can be of help in context with the in silico development and testing of hip prostheses.

Organisationseinheit(en)

Institut für Umformtechnik und Umformmaschinen

Externe Organisation(en)

Stiftung Tierärztliche Hochschule Hannover

Typ

Artikel

Journal

Biomedical engineering online

Band

Seiten

ISSN

1475-925X

Publikationsdatum

23.11.2009

Publikationsstatus

Veröffentlicht

Peer-reviewed

Elektronische Version(en)

https://doi.org/10.1186/1475-925X-8-36 (Zugang: Unbekannt)

Details im Forschungsportal „Research@Leibniz University“

BibTeX

@article{970921f457cc46488f4ee2b15483ea21,
title = "Multi-body simulation of a canine hind limb: model development, experimental validation and calculation of ground reaction forces",
abstract = "BACKGROUND: Among other causes the long-term result of hip prostheses in dogs is determined by aseptic loosening. A prevention of prosthesis complications can be achieved by an optimization of the tribological system which finally results in improved implant duration. In this context a computerized model for the calculation of hip joint loadings during different motions would be of benefit. In a first step in the development of such an inverse dynamic multi-body simulation (MBS-) model we here present the setup of a canine hind limb model applicable for the calculation of ground reaction forces.METHODS: The anatomical geometries of the MBS-model have been established using computer tomography- (CT-) and magnetic resonance imaging- (MRI-) data. The CT-data were collected from the pelvis, femora, tibiae and pads of a mixed-breed adult dog. Geometric information about 22 muscles of the pelvic extremity of 4 mixed-breed adult dogs was determined using MRI. Kinematic and kinetic data obtained by motion analysis of a clinically healthy dog during a gait cycle (1 m/s) on an instrumented treadmill were used to drive the model in the multi-body simulation.RESULTS AND DISCUSSION: As a result the vertical ground reaction forces (z-direction) calculated by the MBS-system show a maximum deviation of 1.75%BW for the left and 4.65%BW for the right hind limb from the treadmill measurements. The calculated peak ground reaction forces in z- and y-direction were found to be comparable to the treadmill measurements, whereas the curve characteristics of the forces in y-direction were not in complete alignment.CONCLUSION: In conclusion, it could be demonstrated that the developed MBS-model is suitable for simulating ground reaction forces of dogs during walking. In forthcoming investigations the model will be developed further for the calculation of forces and moments acting on the hip joint during different movements, which can be of help in context with the in silico development and testing of hip prostheses.",
keywords = "Animals, Biomechanical Phenomena, Biomedical Engineering/methods, Computer Simulation, Dogs, Kinetics, Lower Extremity/physiology, Male, Models, Theoretical, Stress, Mechanical, Tomography, X-Ray Computed/methods, Walking",
author = "Gabriele Helms and Bernd-Arno Behrens and Martin Stolorz and Patrick Wefstaedt and Ingo Nolte",
year = "2009",
month = nov,
day = "23",
doi = "10.1186/1475-925X-8-36",
language = "English",
volume = "8",
pages = "36",
journal = "Biomedical engineering online",
issn = "1475-925X",
publisher = "BioMed Central Ltd.",
}