It's not just grandma with a new hip and your uncle with a new knee. More than two of every 100 Americans have an artificial joint, doctors are reporting.
Among those over 50, it's even more common: Five percent have replaced a knee and more than 2 percent, a hip.
"They are remarkable numbers," said Dr. Daniel Berry, chairman of orthopedic surgery at the Mayo Clinic. He said roughly 7 million people in the United States are living with a total hip or knee replacement.
Why the boom?
"People are aware that they're a success" and are less willing to put up with painful joints, he said.
Results of the joint replacement study are to be reported today at an American Academy of Orthopaedic Surgeons conference in New Orleans.