Severity of rotator cuff disorders and additional load affect fluoroscopy-based shoulder kinematics during arm abduction

Autor: Eleonora Croci, Hanspeter Hess, Jeremy Genter, Cornelia Baum, Balazs Krisztian Kovacs, Corina Nüesch, Daniel Baumgartner, Kate Gerber, Andreas Marc Müller, Annegret Mündermann
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: Journal of Orthopaedics and Traumatology, Vol 25, Iss 1, Pp 1-11 (2024)
Druh dokumentu: article
ISSN: 1590-9999
DOI: 10.1186/s10195-024-00774-2
Popis: Abstract Background Rotator cuff disorders, whether symptomatic or asymptomatic, may result in abnormal shoulder kinematics (scapular rotation and glenohumeral translation). This study aimed to investigate the effect of rotator cuff tears on in vivo shoulder kinematics during a 30° loaded abduction test using single-plane fluoroscopy. Materials and methods In total, 25 younger controls, 25 older controls and 25 patients with unilateral symptomatic rotator cuff tears participated in this study. Both shoulders of each participant were analysed and grouped on the basis of magnetic resonance imaging into healthy, rotator cuff tendinopathy, asymptomatic and symptomatic rotator cuff tears. All participants performed a bilateral 30° arm abduction and adduction movement in the scapular plane with handheld weights (0, 2 and 4 kg) during fluoroscopy acquisition. The range of upward–downward scapular rotation and superior–inferior glenohumeral translation were measured and analysed during abduction and adduction using a linear mixed model (loads, shoulder types) with random effects (shoulder ID). Results Scapular rotation was greater in shoulders with rotator cuff tendinopathy and asymptomatic rotator cuff tears than in healthy shoulders. Additional load increased upward during abduction and downward during adduction scapular rotation (P
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