@jnoronha @johnbishop I have had two TKRs and not had a scar tissue problem or perhaps a very small one.

I have not been able to get my flex to more than 120 + or -. My orthopedist said he could do a Lysis treatment which is an outpatient procedure to take out scar tissue if I wanted to get a little more flex. I am not sure though if the problem is from scar tissue of if I just didn't do enough PT at home so I decided what I have is functional enough. I didn't dread the surgery as much as the recovery afterward. Your flex is much lower though so you should ask your orthopedist about that.

I have never heard of cortisone injections after TKRs but perhaps they do use them to treat your type of problem. I had them numerous times prior to my surgeries.

If your pain continues you may want to consider a second opinion from a highly regarded orthopedist. If you do choose to do that make sure you get one who is very well rated. Generally, the best are at the large university associated medical centers or other large hospitals in the city but there are some that are more local too. I live in southern NH and there are a couple of orthopedists up here that have had phenomenal success and are very highly regarded, both in different cities from where I live. I do go to Boston for most of my care, either at Mass General, or at Brigham and Women's which is now affiliated with Mass General. My orthopedist is there.
JK