I had my total knee replacement done 7 years ago and was still having pain making it difficult to walk. I started getting nerve ablation in the knee 3 years ago and the pain is almost completely gone. It only lasts for about 9/10 months before the nerves grow back together but all you need to do at that point is repeat the procedure! I have repeated 3 times and it's not that difficult to get an appointment. Once pain starts to return make your appointment.
You will not be disappointed!
Good Luck