Yes you are one of the fortunate few. I had bilateral knee surgery in late Feb this year. I had so much swelling and bruising that it made it difficult to do my exercise. I persevered, but even with daily exercises, going to physio, both my knees were stuck.
My left was 75° and my right was 55°. The physio therapist was baffled that the joints just stopped at that. I had an MUA on July 5. It has improved ... my right is now pushing 77° with a -9° extension, and my left finally reached over 90° the other day, it was 98° and extension was -2°.
The cement feeling in my knees and the gridlock was due to scar tissue. I have osteoarthritis in both knees, and a bit in my wrists. Scar tissue is not pleasant, and some has returned, but I'm determined to kick its arse to the curb. I will say though, that what this 5 month journey has done for me, is that I don't want to go through knee surgery ever again, nor an MUA for that matter. I really feel for other patients who have scar tissue . It's debilitating. It makes us feel that there is no hope. I had the surgery because I was bone on bone, but at least I had a 118° left knee bend, and 123° right knee bend before my surgery in Feb. Hindsight is 50/50.
We don't all have that success story to tell. My surgeon kept pushing more and more pain meds , I said NO more after 4 mths of hell. They are very quick to prescribe the opiates, but it's not for me. I'm back to extra strength Tylenol 500 mg, only when i need it, especially at night. I take cbd oil occasionally to get me through the day. I'm getting my life back and it's not going to be on opiates, because they're not for me. Doctors need to quit thinking that every patient is cookie cut exactly the same way and that they should all recover the same. That's been my beef over this. Kudos to you and all others who have a happiest of success stories. My journey isn't over .. but I'll get there. Good luck to all other patients who are struggling with crappy ROM, I know how you feel. Praying 🙏 for all partial knee replacement and total knee replacement patients. I'm in your court. Cheers.