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How successful are knee replacements?

According to the US FDA (2003), 90 percent of people who have knee replacements are happy with the results. Studies examining the success of knee replacements found that in about 10 percent of cases, revision surgery was needed after 10 years, and in 20 percent after 20 years.

Reference: 

Roger H. Emerson, Jr., MD, and Linda L. Higgins, PhD. Unicompartmental Knee Arthroplasty with the Oxford Prosthesis in Patients with Medial Compartment Arthritis. In The Journal of Bone and Joint Surgery. January 2008. Vol. 90-A. No. 1. Pp. 118-122.

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