Impact of Humeral Component Version on Outcomes Following RTSA

Retrospective clinical evidence suggests that increasing humeral component retroversion does
not affect measured internal or external rotation, however patients with neutral version may
experience better function with daily activities requiring internal rotation compared to
those with 30 degrees of retroversion. Prospective data on clinical outcomes comparing
different humeral component versions in RTSA is currently lacking. The proposed study is a
prospective, single-blinded, randomized trial to investigate the impact of humeral component
version on shoulder range of motion and patient reported functional outcomes following
reverse total shoulder arthroplasty.

Inclusion Criteria:

- Patients undergoing primary reverse total shoulder arthroplasty

- Diagnosis of cuff tear arthropathy or primary OA with RCT

- Intact posterior rotator cuff and subscapularis preoperatively, as determined by
surgeon-administered physical exam

- 18 years or older

Exclusion Criteria:

- Revision arthroplasty

- Diagnosis of rheumatoid arthritis, infection, acute trauma or instability

- Minors (under 18 years of age)

- Prior open shoulder surgery

- Concomitant latissimus dorsi transfer

- Patients not undergoing a standard of care physical therapy protocol

- Pregnant, patient-reported

- Cognitively impaired