Retroversion in Reverse Shoulder Arthroplasty

In a Reverse Shoulder Arthroplasty, Does Function Depend on the Humeral Version? A Prospective Randomized Study.

The goal of this clinical trial is to compare function in reverse shoulder arthroplasty (RSA) using two different degrees of humeral retroversion (RV). The main question it aims to answer is:

• Does external rotation improves when using a higher retroversion?

Participants will randomly receive a 0 degree or 30 degree RV for their RSA.

They will be followed for two years and clinical outcomes will be recorded and analyzed.

Inclusion Criteria:

• patients > 60 years
• primary rotator cuff arthropathy
• implantation of reverse shoulder arthroplasty

Exclusion Criteria:

• previous surgeries in the shoulder
• post-traumatic arthropathy