The Journal of Bone and Joint Surgery, Vol 66, Issue 8 1211-1218, Copyright © 1984 by Journal of Bone and Joint Surgery, Inc
Polycentric total knee arthroplasty. A ten-year follow-up study
DG Lewallen, RS Bryan and LF Peterson
After review of the first 209 polycentric total knee arthroplasties (in 159
patients) performed at the Mayo Clinic between July 1970 and November 1971,
we found that the calculated probability of the arthroplasty remaining
successful ten years postoperatively was 66 per cent. Actual results showed
42 per cent of the arthroplasties to be successful in patients who were
still alive at review; another 24 per cent were successful but were in
patients who had died or were lost to follow-up before ten years
postoperatively. In 34 per cent failure occurred, which we defined as
reoperation for any reason, unacceptable pain, or loss of function. The
most common causes of failure were instability or ligament laxity (13 per
cent), loosening of a component (7 per cent), infection (3 per cent), and
patellofemoral joint pain (4 per cent). Prior knee surgery significantly
decreased the probability of success, as did axial malalignment of the
prosthetic components at operation.
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