The Journal of Arthroplasty
Volume 25, Issue 3 , Pages 337-341, April 2010

Mechanical Stability of Novel Highly Porous Metal Acetabular Components in Revision Total Hip Arthroplasty

  • R. Michael Meneghini, MD

      Affiliations

    • Department of Orthopaedic Surgery, New England Musculoskeletal Institute, University of Connecticut Health Center, Farmington, Connecticut
    • Corresponding Author InformationReprint requests: R. Michael Meneghini, MD, Department of Orthopaedic Surgery, University of Connecticut Health Center, 4th Floor, Medical Arts and Research Building, #4016 263 Farmington Ave Farmington, CT 06034-4037.
    • ,
  • Christopher Meyer, MS

      Affiliations

    • Department of Biomedical and Mechanical Engineering, Rose-Hulman Institute of Technology, Terre Haute, Indiana
    • ,
  • Christine A. Buckley, PhD

      Affiliations

    • Department of Biomedical and Mechanical Engineering, Rose-Hulman Institute of Technology, Terre Haute, Indiana
    • ,
  • Arlen D. Hanssen, MD

      Affiliations

    • Department of Orthopedic Surgery, Mayo Clinic Rochester, Minnesota
    • ,
  • David G. Lewallen, MD

      Affiliations

    • Department of Orthopedic Surgery, Mayo Clinic Rochester, Minnesota

Received 4 October 2008; accepted 6 March 2009. published online 10 April 2009.

Abstract 

Highly porous metal acetabular components have emerged for revision hip arthroplasty. However, superior mechanical stability over traditional cementless components has not been demonstrated. Three different cementless acetabular components, including 2 highly porous tantalum designs, were inserted into hemipelvis specimens with a superolateral defect. Mechanical testing was performed to failure using a servohydraulic testing machine. The porous tantalum designs exhibited superior stability over the traditional cementless implant (P < .05). There was no difference in mechanical stability between the rigid modular tantalum shell and the more flexible revision tantalum shell (P > .46). In acetabular revision, highly porous tantalum acetabular components provide superior mechanical stability. However, these results suggest that improved frictional resistance is a more important design feature over implant flexibility with this particular implant.

Keywords: porous tantalum, acetabulum, revision hip arthroplasty, fixation, mechanical stability

To access this article, please choose from the options below

Login to an existing account or Register a new account.

  • Purchase this article for 31.50 USD (You must login/register to purchase this article)

    Online access for 24 hours. The PDF version can be downloaded as your permanent record.

  • Subscribe to this title

    Get unlimited online access to this article and all other articles in this title 24/7 for one year.

  • Claim access now

    For current subscribers with Society Membership or Account Number.

  • Visit SciVerse ScienceDirect to see if you have access via your institution.
 

 Benefits or funds were received in partial or total support of the research material described in this article. These benefits or support was received from the following sources: implants donated by Zimmer Inc, Warsaw, Ind.

PII: S0883-5403(09)00072-2

doi:10.1016/j.arth.2009.03.003

The Journal of Arthroplasty
Volume 25, Issue 3 , Pages 337-341, April 2010

Article Tools

* Image Usage & Resolution