What is the best artificial knee?

Many: They are several of them in the market now.You should be more concern witch of those knees or knee is your surgeon more familiar with, ask what results he or she)have optained with the knee he or she is using.

Artificial knee: Nowadays, the knee implant is not the limiting factor. Talk with your orthopedic surgeon. The best is what's best for you & surgeon experience.

Many options...: There are several options, but as others have mentioned, most surgeons usually will have a preference... Asking your surgeon about their choice would be a great place to start. If i may, i also suggest you read "fits like a glove" @ http://drmarkgalland.Com/new-article-fits-like-a-glove/ for more information.