EMG and Delta Function in Standard RTSA vs Lateralization

Starting soon · Not applicable

Conditions studied: Cuff Tear Arthropathy, Omarthrosis, Rotator Cuff Tear Arthropathy

In brief

Reverse total shoulder arthroplasty (RTSA) is a well-established method to treat patients with irreparable rotator cuff tears and glenohumeral osteoarthritis. The biomechanical principle implies a medialization and distalization of the center of rotation (COR). Deficiencies in internal and external rotation constitute frequently encountered functional problems. Some studies showed reduced activation of the posterior deltoid in EMG measurements, which may explain the inability to compensate these movements. Lateralized prosthetic designs demonstrated increased external rotation through an alteration of the deltoid's lever arm. The aim of the study is to investigate the impact of lateralization on functional outcome and deltoid EMG activity in comparison to a standard implantation technique.

Key facts

Study ID
NCT07464977
Run by
Vienna Hospital Association
People needed
130
Starts
2026-06-01
Expected to finish
2027-12-01
Last updated by the study team
2026-05-07

Who can join

Age: 60 and older, up to 85. Sex: any. Healthy volunteers: not accepted.

You may qualify if…

You may not qualify if…

Where it is running

Full record on ClinicalTrials.gov

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