This study is about understanding how well a shoulder replacement, called a **shoulder arthroplasty**, works over a long time. **Arthroplasty** means surgery to replace or fix a joint to help it work better. The study will watch patients for at least 10 years to see how the shoulder does after surgery. People can join if they need shoulder surgery or have already had it, are fully grown, and are expected to live at least two more years.

Those with certain health problems, like infections or bone issues, or those who can't follow post-surgery rules, can't join. Pregnant women, prisoners, and people with allergies to the implant material are also excluded.

• Study Length: Minimum of 10 years.
• Eligibility: Must be able to follow pre- and post-surgery visits and sign consent.
• Risks: Includes surgical risks and potential early system failure for some.