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Complex trabecular metal revision cases show equivalent results to simpler cases
Yet, patients with large defects treated with trabecular metal augments had superior WOMAC pain scores.
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ORLANDO, Fla. — Using trabecular metal augments for acetabular revision in patients with severe defects may lead to quality-of-life outcomes similar to patients undergoing simpler revisions, according to a surgeon speaking here.
Clive P. Duncan, MD, FRCS, and colleagues evaluated the radiographic results and quality-of-life outcomes for 34 patients who underwent acetabular revisions involving trabecular metal shells with augments. They compared these patients to a matched cohort of 66 patients who had revision for Type I and II defects.
Duncan presented the results at the 24th Annual Current Concepts in Joint Replacement Winter 2007 Meeting.
The investigators discovered equivalent WOMAC scores for function, Oxford hip scores, Short-Form 12 scores and UCLA activity scores between the groups at a minimum follow-up of 2 years.
However, patients in the complex revision group showed better WOMAC pain scores, Duncan said.
The investigators found and revised two loose components in the complex revision group. None of the 34 patients showed signs of implant migration, Duncan reported.
In addition, only 9% of complex revision cases showed a high hip center postoperatively, compared with 91% preoperatively, according to the study.
"It is a very commonly used technique in our unit," Duncan said during his presentation. "We've had impressive patient-reported quality-of-life outcomes when compared to more straightforward revisions."
For more information:
- Duncan CP. Porous metal augments: Big hopes for big holes. #58. Presented at the 24th Annual Current Concepts in Joint Replacement Winter 2007 Meeting. Dec. 12-17, 2007. Orlando, Fla.