Synvisc, I've had on and off for years and truthfully I notice no improvement or pain relief. I just got both knees done a month ago and once again, no improvement. Yet I'm always hopeful.
I found one knee injection which was a miracle, basically 90% pain relief for 3 months to the day. One day it worked and 90 days later all relief ended. Zilretta, a time released steroid. It gave me the knees I had in my teens. Unfortunetly I had a supposedly uncommon side effect of major hair loss. So I'm putting it off getting this repeated as long as I can based on vanity. My hair has regrown.
I am not a canditate for implants because I have allergies to metals which a $600 blood test, not paid for my Medicare confirmed. So I had to cancel my scheduled knee replacement surgery 3 years ago. There is a ceramic coated metal implant which now has a class action lawsuit in the process as the bone cement fails to stick to the ceramic coating. So I'm waiting for an implant that will work with my allergies.
Fortunely I can still walk on level ground without pain, my issue is stairs and getting off the ground. I don't know how much longer I will be able to garden even using my kneeling bench with arms for me to push up off the ground and when I do it is incredibly painful.
A less expensive option than Stem Cell Therapy is Platelet Rich Plasma, PRP which my othopedist recommends as the next step and I know one woman my age it has helped. Medicare doesn't cover it. I will try that next year.