Open AccessNo Strength Differences Despite Greater Posterior Rotator Cuff Intramuscular Fat in Patients With Eccentric Glenohumeral Osteoarthritis
Author(s) -
Margaret S. Coats-Thomas,
Emma M. Baillargeon,
Daniel Ludvig,
Guido Marra,
Eric J. Perreault,
Amee L. Seitz
Publication year - 2022
Publication title -
clinical orthopaedics and related research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.178
H-Index - 204
eISSN - 1528-1132
pISSN - 0009-921X
DOI - 10.1097/corr.0000000000002253
Subject(s) - medicine , eccentric , rotator cuff , concentric , posterior shoulder , osteoarthritis , weakness , external rotation , arthroplasty , orthopedic surgery , physical therapy , surgery , physics , geometry , mathematics , alternative medicine , pathology , quantum mechanics
When nonoperative measures do not alleviate the symptoms of glenohumeral osteoarthritis (OA), patients with advanced OA primarily are treated with anatomic total shoulder arthroplasty (TSA). It is unknown why TSAs performed in patients with eccentric (asymmetric glenoid wear) compared with concentric (symmetric glenoid wear) deformities exhibit higher failure rates, despite surgical advances. Persistent disruption of the posterior-to-anterior rotator cuff (RC) force couple resulting from posterior RC intramuscular degeneration in patients with eccentric deformities could impair external rotation strength and may contribute to eventual TSA failure. Pain and intramuscular fat within the RC muscles may impact external rotation strength measures and are important to consider.