Knee arthroplasty, on the other hand, is the most common surgical treatment of osteoarthritis worldwide.
In 2011 it accounted for 79,516 primary knee replacements in the UK alone. Of these, 91% were total knee replacements [121].
A comparison of 25,004 primary TKRs on the Norwegian knee arthroplasty register with 56,208 from the Kaiser health care system in the USA showed a seven-year survival of 94.8% and 96.3% respectively [122,123] .
The Swedish joint register states that the10-year risk of revision after primary TKA was 4% .