I had this surgery in January of 2000, at 31 years old, and I believe I’m better off as a result of it.
Prior to the surgery, I had struggled with knee problems all my life (pain, clicking, etc.) but no doctor I saw was ever able to help me. Looking back on it now, it’s clear to me (and should have been clear to the doctors!) that my problems resulted from my flat feet and my tendency to overpronate (i.e. I have feet that roll to the inside). When a person’s feet roll inward, his or her knee rotates inward, and this causes a misalignment of the kneecap, forcing it to track to the outside of the leg. Many years of running, biking, and skating with my kneecap tracking to the outside finally took their toll.
I believe that the last straw (and “biggest straw”) for me was switching to clipless pedals. These pedals cause a person’s foot to be clamped hard into a “flat” position, and with the foot clamped hard and the hip held (relatively) stationary, the knee is the thing that gives. Or, in my case, gives out.
I had the surgery in January, and in June of that year I did an off-road triathlon involving a 30-mile mountain bike and a seven-mile run. I finished very comfortably. I occasionally suffer from some stiffness in my knee, and sometimes (rarely) I have pain while doing weight-bearing exercises to strengthen my VMO/quads. But, the good news is that I have virtually no pain or other ill effects while biking or running, and I’m free to train for and compete in whatever event appeals to me.
To prevent future problems and/or problems with the other knee, I now use Specialized Body Geometry shoes (which provide “anti-pronation support”) and Big Meat wedges to correctly align my foot to my Speedplay pedals. Beware the conventional “wisdom:” Floating pedals alone will NOT help you if your problem is the same as mine! (They do help, but there’s more to it than that.)
My advice is simple: Try to correct the bio-mechanical problem before you decide to have the surgery. Get the proper running shoes, get your feet connected to your pedals properly (most important!), and make sure the entire “kinetic chain” is properly aligned. If these things don’t help you, surgery is always an option. In my case, it was probably too late for these fixes, and the damage had already been done. However, if I’d known 10 years ago what I know now, I’m confident that I could have avoided the surgery.
I’ve tried to be brief here, but I’d be happy to answer questions or provide more details to anyone who would find the information helpful.
Best of luck!