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New Hip, Knee Implants Are Not Better Than Old Versions.

New Artificial Joint Designs Are Not Better: Study

Thursday, 25 Sep 2014 04:19 PM

There is not much hard evidence that new artificial joint devices, including ceramic-on-ceramic bearings for hip replacement and high flexion knee replacement, are better than older options – and in some cases they may be worse – according to a new review.

Senior author Dr. Art Sedrakyan and his team reviewed clinical trials, comparative studies and registries for evidence that five new implantable device innovations were effective and safe.

Similar research published in 2011 led to manufacturers withdrawing some metal-on-metal hip replacement options, which turned out to have higher failure rates than others because the metal parts rubbing together created debris that could lead to inflammation and tissue damage.

“Back in 2011 when we published the first paper on metal-on-metal hips, hundreds of people contacted me and asked if they should be worried about hip replacement in general,” said Sedrakyan, of the Patient Centered Comparative Effectiveness Program and U.S. Food and Drug Administration Medical Device Epidemiology Science and Infrastructure Center at Weill Cornell Medical College in New York.

“The answer is ‘no’ because the procedure is generally very safe and outcomes are generally good,” he said.

However, new product designs tend to be based on engineering data more than on clinical data, he said. It seems, logically, like a new design may have an advantage over the old, but that often isn’t supported by evidence with real patients, he said.

Full article link: New Hip, Knee Implants Are Not Better Than Old Versions.