ReviewArchives of orthopaedic and trauma surgery2026
Simulated tears of antero-posterior rotator cuff force-couple and reduced glenoid concavity decrease anterior glenohumeral stability: a robot-assisted biomechanical analysis of a load and shift sequence.
Review in Archives of orthopaedic and trauma surgery, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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6 authors.
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Abstract
backroundThe glenoid concavity and the compression applied by the rotator cuff (RC) are essential for glenohumeral stability (GHS). This study aimed to determine how different simulated rotator cuff tears (RCT) and the glenoid depth influence GHS.
methodsA Load and Shift sequence was performed with eight fresh-frozen cadaveric shoulders in a robotic-assisted setup. Differently configured static loading of the reinforced RC and deltoid muscle (DLT) simulated intact RC and anterior, superior, anterosuperior, posterosuperior, mass, and complete RC plus DLT tears. Anterior dislocation forces and their changes were determined as indicators of stability. The glenoid depth and Bony shoulder stability ratio (BSSR) were defined as indicators of concavity. To assess GHS, the maximal force (F
resultsSimulated tears of the subscapularis tendon (SCP) (ΔF
conclusionSimulated tears of the SCP or ISP + TM significantly affect the anterior GHS in this model. These findings highlight the importance of careful evaluation regarding the indication for surgical reconstruction in such configurations. Decreased glenoid concavity reduces the anterior GHS and should be considered in treatment algorithms for shoulder instability. STUDY
designControlled Laboratory Study. LEVEL OF EVIDENCE: IV.
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