Hope you have a speedy recovery!
My knees are bad as well. The last time I paid a visit to my orthopedic doctor, I was waiting for x-ray results when I heard him outside say, "Oh my god! Guys, come look at this!" Let's just say my knees don't belong to a 32-year-old.
How is your right knee doing? I asked my doctor about arthro and he said to wait until I'm 50 for a TKR. He said that if I got it done now I would probably need it again in two years.
Jay