Knee Replacements Can Fail for Various Reasons, Expert Says
Implants vulnerable to friction, infection, instability, fracture and stiffness, specialist warns
FRIDAY, July 16 (HealthDay News) -- Knee implants perform well for at least 15 to 20 years in more than 95 percent 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 percent of patients who undergo revision knee surgery have good to excellent results, but "up to 20 percent of patients may still experience pain following surgery for months or even years," Ranawat said.
The American Academy of Orthopaedic Surgeons has more about knee implants.
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