Role of coracoacromial ligament and related structures in glenohumeral stability: a cadaveric study.

Published

Journal Article

This study sought to determine the role of the coracoacromial ligament and related arch structures in glenohumeral joint stabilization. Eight fresh-frozen cadaver specimens were tested at multiple angles of glenohumeral abduction and rotation for translations (in the direction of and perpendicular to a 50-N force) in intact, vented shoulders and after three interventions: coracoacromial veil release, coracoacromial ligament release, and anterior acromioplasty. After releasing the veil, an inferior force significantly increased inferior translation at lower angles of abduction with no additional increase after coracoacromial ligament section or acromioplasty. After ligament release or acromioplasty, a superior force increased superior translation at all angles. Few increases in anterior or posterior translations were observed. The coracoacromial veil interacts with the structures of the coracoacromial arch and glenohumeral capsule to limit inferior humeral translation. Likewise, the coracoacromial ligament and the acromian serve to limit superior translation. Attempts to preserve these structures may help improve surgical outcomes.

Full Text

Cited Authors

  • Moorman, CT; Warren, RF; Deng, X-H; Wickiewicz, TL; Torzilli, PA

Published Date

  • January 2012

Published In

Volume / Issue

  • 21 / 4

Start / End Page

  • 210 - 217

PubMed ID

  • 23327845

Pubmed Central ID

  • 23327845

International Standard Serial Number (ISSN)

  • 1548-825X

Digital Object Identifier (DOI)

  • 10.3113/jsoa.2012.0210

Language

  • eng