Doctors Hoping for New Era of Artificial Ankles
WASHINGTON (AP) - What was left of Dan Sivia's ankle simply didn't work. He limped through his 30s by sheer force of will, one foot almost completely immobile from repeated broken bones and surgeries. Then a doctor offered his last hope: An ankle replacement. A what? Sivia knew about hip, knee, even shoulder replacements. But ankles?
His confusion is understandable: The first ankle replacements of the 1970s were abandoned when they couldn't withstand the pounding of daily life. A second generation in the '90s lasted longer but never became really popular.
Now the nation is embarking on a new generation of artificial ankles designed to work more like the joint you're born with, a move specialists hope finally will offer less pain and more function to thousands who hobble - although it's too soon to be sure.
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"These third-generation prostheses really mimic a natural ankle, which is really what makes them different," says ankle specialist Dr. Steven L. Haddad of the Illinois Bone and Joint Institute and an orthopedic surgery professor at Northwestern University.
If the newer implants pan out, it's a market ripe for growth. More than 200,000 people seek care for ankle pain annually, with few options for the severely damaged. More than 8,000 a year get their ankle bones fused, a last-ditch treatment after years of suffering, while surgeons perform between 2,000 and 2,500 ankle replacements.
While Medicare pays for ankle replacements, which Haddad says can reach $50,000 including a three- to five-day hospital stay, many other insurers don't. And a review in September's Journal of the American Academy of Orthopedic Surgeons cautions that so far, there is little research to tell how long newer versions will last - and that few hospitals have much practice in implanting them.
But for Sivia, the surgery restored an ability to walk that the 39-year-old thought he'd forever lost. His leg was crooked from a series of breaks that began in childhood and included a crushing ankle fracture at 28. A decade of pain later, he sought out Haddad. Then he spent 17 months on crutches, with external pins holding bones in place, as Haddad rebuilt his leg. The last surgery, the ankle implant, came in July.
