A Study Comparing the Outcome of a Large-Diameter versus Small-Diameter Glenosphere (Shoulder/Arm Ball-Joint) in Primary Reverse Shoulder Arthroplasty


About this study

The purpose of this study is to compare the outcome of primary reverse shoulder arthroplasty using the Stryker ReUnion System with the implantation of either a large (40 mm) or a small (36 mm) glenosphere (shoulder to arm, ball shaped joint).

Participation eligibility

Participant eligibility includes age, gender, type and stage of disease, and previous treatments or health concerns. Guidelines differ from study to study, and identify who can or cannot participate. There is no guarantee that every individual who qualifies and wants to participate in a trial will be enrolled. Contact the study team to discuss study eligibility and potential participation.

Inclusion Criteria

  • Willing to sign the informed consent
  • Male and non-pregnant female subjects ages 50 - 90 at the time of surgery
  • Require a primary reverse total shoulder arthroplasty
  • Have the diagnosis of cuff-tear arthropathy (CTA), massive irreparable rotator cuff tear (MRCT) or osteoarthritis (OA) with marked posterior subluxation or bone loss

Exclusion Criteria

  • Inability to comply with follow-up requirements
  • Have inflammatory arthritis
  • Have proximal humerus fractures
  • Have sequels of trauma
  • Are immunologically compromised
  • Have an active or suspected latent infection in or about the shoulder
  • Need to add a tendon transfer
  • Need a structural humeral bone graft
  • Are pregnant

Participating Mayo Clinic locations

Study statuses change often. Please contact the study team for the most up-to-date information regarding possible participation.

Mayo Clinic Location Status Contact

Rochester, Minn.

Mayo Clinic principal investigator

Mark Morrey, M.D.

Closed for enrollment

Contact information:

Teron Cox CCRP

(507) 538-3560


More information


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