My mom had a PKR that lasted a long time and enabled her to play tennis until her COPD (thank you Chesterfield cigarettes!) put a stop to it at age 82. Hers was done by Gerard Engh at the Anderson Clinic in Virginia, a leading developer of PKR. Are you anywhere near the Anderson Clinic? When I was seeking a second opinion on my knee, my doctor said get two second opinions. Fortunately the two second opinions were alike. But what if the opinions are different? I would've gotten still another opinion. I know you are trying to navigate a path that salvages your treasured activities. It's not like you're in your 60s or beyond when the effects of aging are really felt and one has to accept some decline in function. If only there was some really good way to re-establish a healthy meniscus!