Robotic-Assisted Medial Knee Arthroplasty Tied to Good Long-Term Outcomes

TUESDAY, May 30, 2023 (HealthDay News) -- Ten-year survivorship and patient satisfaction following robotic-arm-assisted medial unicompartmental knee arthroplasty (UKA) is high, according to a study published online May 5 in the Journal of Bone & Joint Surgery.

Tarik Bayoumi, M.D., from Weill Medical College of Cornell University, in New York City, and colleagues evaluated long-term implant survivorship, modes of failure, and patient satisfaction following robotic-arm-assisted medial UKA. Analysis included 366 consecutive patients (411 knees) undergoing robotic-arm-assisted medial UKA.

The researchers found that over a mean follow-up of 10.2 years, a total of 29 revisions were reported, yielding a 10-year survivorship of 91.7 percent. Twenty-six of all UKAs were revised to total knee arthroplasty. The most commonly reported modes of failure included unexplained pain and aseptic loosening (38 and 35 percent of revisions, respectively). More than nine in 10 patients without revision (91 percent) were either satisfied or very satisfied with their overall knee function.

"This prospective multicenter study found high 10-year survivorship and patient satisfaction following robotic-arm-assisted medial UKA," Bayoumi said in a statement. "Since this was a single-arm trial, it remains to be determined whether robotic-arm assistance for UKA results in improved outcomes compared to conventional UKA."

The study was financially supported by Stryker, and several authors disclosed ties to the company.

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