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Complication rate increased with metal-on-metal THA
Due to lack of demonstrated superiority, increased complication rate, greater cost and the potential for adverse medical consequences, researchers caution against using metal-on-metal bearing surfaces during total hip arthroplasty, according to recent study results.
Researchers performed a systematic review of literature published between January 1980 and July 2011. They compared metal-on-metal (MOM) and conventional primary total hip arthroplasty (THA) functional outcomes, radiographic outcomes and complication rates. Data were extracted and aggregated using a Mantel-Haenszel cumulative fixed effects meta-analysis.
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There were no significant differences between MOM and conventional THA Harris Hip Scores, according to the abstract. Researchers also found no significant difference in radiographic radiolucent lines between either group.
However, researchers noted patients who underwent MOM THA experienced a significantly increased complication rate as well as greater erythrocyte, serum and urine metal ion concentrations.
Disclosure: The researchers report being on the speaker’s bureau for Salient Surgical and being a paid consultant for DePuy.