Emerging Data

Emerging Data

July 24, 2019
3 min read
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Low revision risk found with mobile bearing implant in UKA

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Published results showed no increased risk of revision at a minimum 5-year follow-up among highly active patients who underwent unicondylar knee arthroplasty with a mobile bearing implant.

Researchers categorized 487 patients undergoing unicondylar knee arthroplasty (UKA) with the Oxford mobile bearing knee (Zimmer Biomet) into either a low activity or high activity group based on postoperative University of California, Los Angeles activity score. Researchers evaluated range of motion, Knee Society Scores (KSS), complications and reoperations preoperatively and postoperatively.

Results showed patients in the high activity group had significantly more men, were younger and had higher preoperative KSS clinical and functional scores. Postoperatively, researcher found significantly higher improvements in the KSS and pain among patients in the high activity group. The low activity group had a revision rate of 8.4% vs. 6.2% in the high activity group. Researchers found a 94% and 92.1% rate of survival for the high activity and low activity groups, respectively, at a mean 9-year follow-up.

“Based on the findings of the study, patient activity following UKA may not need to be restricted as failure rates of high and low activity patients were similar,” the authors wrote. “Younger, active patients with single-compartment end-stage arthritis should be considered candidates for this procedure.” – by Casey Tingle

Disclosures: Crawford reports he is a paid consultant for Ossio LTD, is an unpaid consultant for SPR Therapeutics, receives research support from KCI USA Inc. and is on the editorial or governing board for the American Journal of Sports Medicine. Please see the full study for a list of all other authors’ relevant financial disclosures.