I have 2 hip prothesis. For the first, left leg, I delayed the surgery much too long. I was stuborn and tought wrongly that the longer I wait, the longer the prothesis will stand in future. After the sugery that leg never functioned correctly. In fact the cartilage vanishes totally and thus you distort the natural moving proces. When the same symptomes appeared in my right hip we didn't wait with the surgery, which was very successfull processed. For the record my left hip was done in 2000 and the right hip in 2008. Both are still stable, recently checked. I am 71 years old now. Thus my advice on the spot, don't wait too long. The sooner the better