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Poor functional outcomes seen after revising metal-on-metal hip resurfacings
COPENHAGEN — A hip tribology study presented here showed that in a series of 795 patients who underwent primary metal-on-metal hip replacements between 1997 and 2009, those revised to a second or a third hip arthroplasty had what investigators described as “disappointing” post-revision functional outcomes.
According to James Beazley, MBChB, MRCS, a trauma and orthopaedic registrar in the West Midlands, U.K., “this is one of the largest series” of its kind, as it included 927 procedures with extended follow-up.
Beazley, who presented the findings at the 12th EFORT Congress 2011, said women comprised two-thirds of the 68 patients studied who required a revision procedure by 6 years postoperatively, on average.
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However, the overall average time to revision was 49 months following the index resurfacing procedure. A loose cup, reported in 31% of patients, was the main reason for the second surgeries.
Thirteen percent of patients had a second revision, typically for infection or instability, Beazley said, noting that group had an Oxford Hip Score of 34 points.
Reference:
- Beazley J, Foguet P, Prakash U, et al. Functional outcome of revised metal on metal hip resurfacing arthroplasty. Region: An analysis of epidemiology and risk factors over 11 years. Paper #1088. Presented at the 12th EFORT Congress 2011. June 1-4. Copenhagen.
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