There was an issue apparently with some early ball-socket joints, they started shedding iron particles, which obviously gets bad. So she had a "revision" they call it. She came back from them pretty quickly, but the rotator cuff thing was really bad for her, and in general.
The bad thing is I had shoulder surgery a week after hers, not nearly as complicated, but bad enough. We had some help for a couple weeks. The good thing is my shoulder no longer is unusually painful. I had hurt it at age 16 pitching, nobody back then had a clue what it was.