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Med Eng Phys. 2017 Nov;49:140-147. doi: 10.1016/j.medengphy.2017.08.013. Epub 2017 Sep 8.

A simulation framework for humeral head translations.

Author information

1
Automatic Control Laboratory, Ecole Polytechnique Fédérale de Lausanne (EPFL), Station 9, CH-1015 Lausanne, Switzerland; Laboratory of Biomechanical Orthopedics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Switzerland.
2
Department of Orthopedics and Traumatology, University Hospital Centre and University of Lausanne (CHUV), Switzerland.
3
Laboratory of Biomechanical Orthopedics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Switzerland.
4
Automatic Control Laboratory, Ecole Polytechnique Fédérale de Lausanne (EPFL), Station 9, CH-1015 Lausanne, Switzerland. Electronic address: philippe.muellhaupt@epfl.ch.

Abstract

Humeral head translations (HHT) play a crucial role in the glenohumeral (GH) joint function. The available shoulder musculoskeletal models developed based on inverse dynamics however fall short of predicting the HHT. This study aims at developing a simulation framework that allows forward-dynamics simulation of a shoulder musculoskeletal model with a 6 degrees of freedom (DOF) GH joint. It provides a straightforward solution to the HHT prediction problem. We show that even within a forward-dynamics simulation addressing the HHT requires further information about the contact. To that end, a deformable articular contact is included in the framework defining the GH joint contact force in terms of the joint kinematics. An abduction motion in the scapula plane is simulated. The results are given in terms of HHT, GH joint contact force, contact areas, contact pressure, and cartilage strain. It predicts a superior-posterior translation of the humeral head followed by an inferior migration.

KEYWORDS:

Deformable articular contact; Forward-dynamics simulation; Glenohumeral joint; Humeral head translations; Shoulder musculoskeletal model

PMID:
28890303
DOI:
10.1016/j.medengphy.2017.08.013
[Indexed for MEDLINE]

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