Oh thanks for mentioning that, Donna. We must have been replying at the same time because I didn't see your reply at first. My surgeon also suggests replacing the worn cups in my hips, which I think are somewhat like having the spacers replaced in your knees(?).
Take care,
James

HLA-B27+, JRA diagnosis in 1981, re-diagnosed as AS in 1988. Also iritis, colitis, and psoriasis. NSD + low carb helps me. My health makes it hard for me to post in a timely way.