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Promising midterm results seen with specific revision TKA system
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At an average follow-up of 4.8 years, investigators found a 7.9% failure rate and a 4% rate of infection with the use of a revision total knee arthroplasty system.
Researchers retrospectively assessed 272 patients implanted with the Vanguard SSK Revision Knee System (Biomet) during an 8-year period. Patients had an average age of 67.2 years. Investigators calculated the Cochran-Mantel-Haenszel statistic to quantify the re-infection risk in knees with a diagnosis of infection at the initial procedure.
Findings showed 22 prostheses out of the 297 prostheses implanted needed to be revised. Investigators noted infection, aseptic loosening, early periprosthetic fracture, extensor mechanism problems, instability and arthrofibrosis were among the reasons for failure. The rate of infection was 4%, with six cases of re-infection. The rate of aseptic failure was 3.4%.
According to Kaplan-Meier survivorship results, at 1 year, 3 years, 5 years and 7 years the aseptic implant survivorship was 97.2%, 95.6%, 93.1% and 93.1%, respectively.
“The Vanguard SSK demonstrates excellent performance at medium-range follow-up with respect to complications, clinical scores, and prosthesis survivorship,” the authors wrote. ‒ by Monica Jaramillo
Disclosures: Lackey reports he receives grants from Biomet. Please see the full study for a list of all other authors’ relevant financial disclosures.
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