Study Reveals What Causes Early Failure of All-Metal Hip Replacements (DrugWatch)
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Numerous studies have linked metal-on-metal hip-replacement systems to dangerous complications and painful consequences. But until now, none pinpointed their failure with as much precision as a study published recently in the Orthopedics medical journal.
Researchers in the July 2012 study found that more than three-fourths of all metal-on-metal hip devices, such as the DePuy ASR and DePuy Pinnacle models, fail within two years of being implanted. Even more shocking, 98 percent of the patients in the study needed revision surgery within three years of the original operation.
Data from 80 patients needing the corrective surgeries was analyzed for the study, and researchers attributed the early failure rates to aseptic acetabular loosening, metal hypersensitivity reactions, pseudotumor formation and component seizing.
Acetabular cup loosening was the most common culprit of early failure rates at 56.25 percent, and resea...
