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EMG and Delta Function in Standard RTSA vs Lateralization

NCT07464977 · Status: NOT_YET_RECRUITING · Phase: NA · Type: INTERVENTIONAL · Enrollment: 130

Last updated 2026-05-07

No results posted yet for this study

Summary

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.

Conditions

  • Cuff Tear Arthropathy
  • Omarthrosis
  • Rotator Cuff Tear Arthropathy

Interventions

DEVICE

Lateralization of glenoid component

Lateralization of glenoid component in reverse total shoulder arthroplasty via metal augment on the glenoid side with a thickness of at least 4mm

DEVICE

Standard implantation technique

Implantation of a standard glenoid component without any lateralization via metal back on the glenoid site

Sponsors & Collaborators

  • Vienna Hospital Association

    lead OTHER_GOV

Principal Investigators

  • Robert Breuer, MD · Vienna HA

Study Design

Allocation
RANDOMIZED
Purpose
DIAGNOSTIC
Masking
SINGLE
Model
PARALLEL

Eligibility

Min Age
60 Years
Max Age
85 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2026-06-30
Primary Completion
2027-08-31
Completion
2027-12-31

Countries

  • Austria

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT07464977 on ClinicalTrials.gov