8 Statistics for Unicondylar Knee Replacement Revision Rates

Orthopedic Sports Medicine

Knee jointA study recently published in the Journal of Bone and Joint Surgery examined 23,400 Oxford unicondylar knee replacements to treat osteoarthritis at 366 centers performed by 919 surgeons. The study reported:

•    Revision rate for the lowest volume centers — 50 or fewer procedures during the eight-year study period — was 1.62 revisions per 100 component years;
•    Revision rate for high volume centers — more than 400 procedures over the eight-year study period — was 1.16 per 100 component years;
•    Five-year implant survival rate was 92.3 percent in low volume centers;
•    Five-year implant survival rate for high volume centers was 94.1 percent;
•    Revision rate for surgeons in centers performing 25 or fewer procedures during the eight-year study period was 2.16 revisions per 100 component years;
•    Surgeons who performed more than 200 procedures during the eight-year study period reported 0.8 revisions per 100 component years.
•    Five-year survival rate for centers performing 25 or fewer procedures during the eight-year study period was 90.1 percent;
•    Highest-volume surgeons reported 96 percent five year implant survival rate.

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