A rigid body model for the assessment of glenohumeral joint mechanics: Influence of osseous defects on range of motion and dislocation

Authors

Mark F. Welsh, Hand and Upper Limb Centre
Ryan T. Willing, Hand and Upper Limb Centre
Joshua W. Giles, Hand and Upper Limb Centre
George S. Athwal, Hand and Upper Limb CentreFollow
James A. Johnson, Hand and Upper Limb Centre

Document Type

Article

Publication Date

2-29-2016

Journal

Journal of Biomechanics

First Page

514

Last Page

519

URL with Digital Object Identifier

10.1016/j.jbiomech.2015.11.001

Abstract

© 2016. The purpose of this study was to employ subject-specific computer models to evaluate the interaction of glenohumeral range-of-motion and Hill-Sachs humeral head bone defect size on engagement and shoulder dislocation. We hypothesized that the rate of engagement would increase as defect size increased, and that greater shoulder ROM would engage smaller defects. Three dimensional computer models of 12 shoulders were created. For each shoulder, additional models were created with simulated Hill-Sachs defects of varying severities (XS=15%, S=22.5%, M=30%, L=37.5%, XL=45% and XXL=52.5% of the humeral head diameter, respectively). Rotational motion simulations without translation were conducted. The simulations ended if the defect engaged the anterior glenoid rim with resultant dislocation. The results showed that the rate of engagement was significantly different between defect sizes (0.001

Notes

© 2015, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ This is an Author Accepted Manuscript. The full published version can be found at https://doi.org/10.1016/j.jbiomech.2015.11.001 in the Journal of Biomechanics.

Creative Commons License

This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.