From Our 2010 Archives
Knee Replacements Can Fail for Various Reasons, Expert Says
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FRIDAY, July 16 (HealthDay News) -- Knee implants perform well for at least 15 to 20 years in more than 95% of patients but can fail for five main reasons, a U.S. expert reports.
"A failed knee implant is usually caused by wear and tear with subsequent loosening of the implant. Other causes are infection, instability, fracture, or stiffness," Dr. Amar Ranawat, a hip and knee specialist at the Hospital for Special Surgery in New York City, said in a hospital news release.
Ranawat explained these problems in more detail in the news release:
Common signs of a failed knee implant include pain, instability, swelling and stiffness, Ranawat noted. And patients with a failed implant may require revision total knee replacement, which usually takes longer than the original knee replacement.
More than 80% of patients who undergo revision knee surgery have good to excellent results, but "up to 20% of patients may still experience pain following surgery for months or even years," Ranawat said.
-- Robert Preidt
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SOURCE: Hospital for Special Surgery, news release, July 9, 2010
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