Does An Enhanced Surface Finish Improve Acetabular Fixation in Revision Total Hip Arthroplasty?

Miranda L. Jamieson, Robert D. Russell, Stephen J. Incavo, Philip C. Noble

Research output: Contribution to journalArticle

9 Scopus citations

Abstract

High-porosity "cancellous metal" coatings have been introduced to increase the fixation and biologic incorporation of acetabular cups. The strength of initial fixation provided by a cancellous metal cups vs conventional alternatives in the deficient revision acetabulum was investigated. Cancellous, plasma-sprayed, and beaded cups (n = 9) were implanted under controlled conditions into a validated model of the revision acetabulum. The greatest differences were seen in resistance to catastrophic (spin-out) failure that, for the cancellous shell, averaged 1076 ± 265 N, which was 25% greater than the plasma-sprayed implant (859 ± 214 N, P = .04) and 218% greater than the beaded implant (338 ± 123 N, P < .01). The cancellous coating also provided greater resistance to ultimate failure. These results suggest that these new cancellous metal coatings may represent a promising alternative for fixation in revision total hip arthroplasty.

Original languageEnglish (US)
Pages (from-to)644-648
Number of pages5
JournalJournal of Arthroplasty
Volume26
Issue number4
DOIs
StatePublished - Jun 1 2011

Keywords

  • Acetabular implants
  • Enhanced coatings
  • Fixation
  • Initial instability
  • Porous coatings

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine

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