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Dual mobility revision of failed MoM THA offers fewer early complications than acetabular revision
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DALLAS — According to a presentation given here at the American Association of Hip and Knee Surgeons Annual Meeting, dual mobility revision of failed monoblock metal-on-metal total hip arthroplasty offers fewer complications than formal acetabular revision.
Investigators reviewed data pertaining to 34 patients with a mean age of 64 years who underwent revision of a monoblock metal-on-metal (MoM) total hip arthroplasty (THA) that was converted to a dual mobility polyethylene bearing that left the cup intact at their institution between January 2012 and December 2014. Investigators compared any instances of major complications, such as instability, infection, aseptic loosening and wound complications, in the cohort to those experienced by 114 patients who underwent formal acetabular revision of a monoblock MoM THA.
The lone early complication noted in patients who underwent dual mobility revision was an instance of instability necessitating formal acetabular revision (3%). Investigators found 28 (20%) early complications in patients who underwent formal acetabular revision, including aseptic loosening, deep infection, dislocation, acetabular fracture, hematoma, infected hematoma, delayed wound healing and superficial infection.
“Early complications [may be] favorable; however, we feel that strict criteria needs to be adhered to and that longer follow-up is necessary to fully understand its implications,” Clint J. Wooten, MD, said in his presentation. — by Christian Ingram
Reference:
Wooten CJ, et al. Paper #8. Presented at: American Association of Hip and Knee Surgeons Annual Meeting. Nov. 6-8, 2015; Dallas.
Disclosure: Wooten reports he has no relevant financial disclosures.