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The influence of full-thickness supraspinatus tears on abduction moments: the importance of the central tendon

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Title: The influence of full-thickness supraspinatus tears on abduction moments: the importance of the central tendon
Authors: Thompson, SM
Prinold, JAI
Hill, AM
Reilly, P
Emery, RJH
Bull, AMJ
Item Type: Journal Article
Abstract: Background: Detachment of the central tendon of the supraspinatus from its insertion is considered to be crucial to functional deficit. The aim of the present study was to assess the function of the supraspinatus in terms of abduction moments by introducing different tear configurations to assess the functional effect of the central tendon insertion. Methods: Ten fresh frozen shoulders from five cadavers were prepared for testing. A testing protocol was established to measure the abduction moment of the supraspinatus under physiological loading tailored to the anthropometrics of each specimen. Four conditions were tested: intact supraspinatus; complete detachment of portion of the supraspinatus tendon anterior to the main central tendon; detachment of the main central tendon; and detachment of the region of the supraspinatus posterior to the main central tendon. Results: There was a significant and large reduction in abduction moment when the central tendon was sectioned (p < 0.05). A smaller reduction in abduction moment was found when the regions anterior and posterior to the main central tendon were sectioned (p < 0.05). Conclusions: The central tendon is vital in the role of functional arm abduction through force transmission through the intact rotator cuff. Reinsertion of the central tendon in the correct anatomical location is desirable to optimize functional outcome of surgery.
Issue Date: 1-May-2019
Date of Acceptance: 22-May-2017
URI: http://hdl.handle.net/10044/1/69408
DOI: https://dx.doi.org/10.1177/1758573217717104
ISSN: 1758-5740
Publisher: Wiley
Start Page: 19
End Page: 25
Journal / Book Title: Shoulder and Elbow
Volume: 11
Issue: 1 Suppl
Copyright Statement: © The Author(s) 2017. The final, definitive version of this paper has been published in Shoulder and Elbow by Sage Publications Ltd. All rights reserved. It is available at: https://journals.sagepub.com/doi/10.1177/1758573217717104
Keywords: biomechanics
in vitro
rotator cuff
Publication Status: Published
Conference Place: United States
Online Publication Date: 2017-07-10
Appears in Collections:Bioengineering
Department of Surgery and Cancer
Faculty of Engineering