Kneecap replacement (patellofemoral arthroplasty)

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A kneecap replacement involves replacing just the under-surface of the kneecap and its groove (the trochlea) if these are the only parts affected by arthritis. This is also called a patellofemoral replacement or patellofemoral joint arthroplasty.

The operation has a slightly higher rate of failure than total knee replacement – usually caused by the arthritis progressing to other parts of your knee. Some surgeons advise a total knee replacement as
a more predictable option, while others feel that it’s better to preserve the rest of the knee joint if it isn’t affected by arthritis. The operation is only suitable for about 1 in 10 people with osteoarthritis. However, the outcome of kneecap replacement can be good if the arthritis doesn’t progress and it’s a less major operation offering speedier recovery times.

A kneecap replacement

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