Dr. Perry gave such a good cortisone shot I always refused to get one from his PA. Limped in and floated out. It was like a miracle. At some point, however the knee gets to where there is no relief and only a replacement will help. That happened with me on one knee after years of cortisone.
I received a similar shot from Dr. Williams on my shoulder. Because of the success with my knees with the cortisone from Dr. Perry, I wanted to follow the same course with my shoulder. Dr. Williams fixed my right shoulder a little over 10 years ago and the success was great, but recovery and therapy was a beitch. Unfortunately, the shoulder is not like the knee and continued cortisone shots will result in the shoulder reducing to a condition where it would not be repairable.