Really good information from Chris.... I was told that I would need one of 3 options on my shoulder. Replacement, reverse replacement, or possibly lower trapezius tendon transfer. The 3rd option was available after the MRI showed little arthritis in my shoulder. The advantage of LTTT is that it is most likely to get me back on a tennis court. It takes a muscle out of my back, weaves it into 2 achilles tendons from a cadaver, and rebuilds the rotator cuffs over the top of the shoulder. Of the 4 rotator cuffs the ones on top of my shoulder were completely severed, the one in front torn (he repaired that one) and the one behind was okay. I've had rotator cuff surgery on both shoulders years ago. I'm 3 months post operative and have JUST begun strengthening PT. Prior to this it was range of motion. Currently I can move my arm, passively, pretty much everywhere. Using a dowel behind my back I can pull my hand up , mid back, above a bra strap. There was a 6 week post op in an awkward immobilizer, but the pain has been very minimal. Have taken nothing stronger than a tylenol since surgery..(and I am a wimp). Very few surgeons perform this surgery. Many can, but few know about it. Anyway..... hope this helps. P.S. I'm 67.

If you were told you need reverse shoulder replacement surgery, there is probably a lot of damage. I was told in 2015 that I needed a total shoulder replacement. It was scheduled for 2016 but I backed out. I had undergone two knee replacements in 2015 and I just felt adding a third surgery would be too much.
I exercised in our heated pool and really did not have any pain. When I asked a surgeon why I had no pain, he said that my bones had fused together so there was no osteoarthritis to cause pain. I am not sure I understand that.
So, finally, in 2023, I had reverse shoulder replacement surgery on my left non dominant shoulder. I had no pain with the surgery nor after the surgery. I think it is common now to give you a type of lidocaine that gets pumped into the nerves going to your shoulder. You wear it for 2 1/2 days and by that time, the pain is pretty much gone.
I did not need pain meds - just tylenol. I also took celebrex. Celebrex may interfere with healing but I have taken it for a long time.
I don't know what my final range of motion will be. I am concerned that I have been a little aggressive about lifting stuff and also using that shoulder. Would I know if something is out of whack?? Not sure.