I had a metal ball replacement because of an accident in 2004 and had pain for months after the surgery. After my arthritis Doctor found I bursitis for which he ordered cortisone shots he also ordered PT in a pool for me. It took a while, about a year, before the pain went completely away but by the time I had to stop the pool exercises (husband was ill) in five years I was way back to normal. Sorry to say after 14 years the pain and weakness has returned and while I have had two epidurals and returned to the exercise pool within the last month it still bothers me.