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Histologic Retrieval Analysis of a Porous Tantalum Metal Implant in an Infected Primary Total Knee Arthroplasty

  • Chris Sambaziotis, MD, MPH

      Affiliations

    • The Center for Orthopaedic Specialties at Montefiore, Montefiore Medical Center, Bronx, New York
    • Albert Einstein College of Medicine, Bronx, New York
    • Corresponding Author InformationReprint requests: Chris Sambaziotis MD, MPH, 3400 Bainbridge Ave., 6th Floor, Bronx, NY 10467.
    • ,
  • Andrew J. Lovy, BA

      Affiliations

    • The Center for Orthopaedic Specialties at Montefiore, Montefiore Medical Center, Bronx, New York
    • Albert Einstein College of Medicine, Bronx, New York
    • ,
  • Karyn E. Koller, MD, MPH

      Affiliations

    • Department of Orthopaedic Surgery, University of Utah School of Medicine, Salt Lake City, Utah
    • Bone and Joint Research Laboratory (151F) VASLCHSC, Salt Lake City, Utah
    • ,
  • Roy D. Bloebaum, PhD

      Affiliations

    • Department of Orthopaedic Surgery, University of Utah School of Medicine, Salt Lake City, Utah
    • Bone and Joint Research Laboratory (151F) VASLCHSC, Salt Lake City, Utah
    • ,
  • David M. Hirsh, MD

      Affiliations

    • The Center for Orthopaedic Specialties at Montefiore, Montefiore Medical Center, Bronx, New York
    • Albert Einstein College of Medicine, Bronx, New York
    • ,
  • Sun Jin Kim, MD

      Affiliations

    • The Center for Orthopaedic Specialties at Montefiore, Montefiore Medical Center, Bronx, New York
    • Albert Einstein College of Medicine, Bronx, New York

Received 2 May 2010; accepted 24 October 2011. published online 19 December 2011.
Corrected Proof

Abstract 

Porous tantalum (Zimmer, Inc, Warsaw, Ind) has the theoretical advantage of improved biologic fixation because of its high porosity, interconnected pore space, and modulus of elasticity. We present a case report documenting the retrieval and bone ingrowth analysis of a porous tantalum tibial component in an infected total knee arthroplasty. Results demonstrated a significantly larger amount of bone ingrowth present in the tibial posts (36.7%) when compared with the bone ingrowth into the tibial baseplate (4.9%) (P < .001). The data suggest that bone ingrowth seen in the plugs as well as baseplate was suggestive of viable bone tissue with healthy bone marrow, osteocytes, and lamella, resulting in a well-fixed tibial implant even at revision surgery for an infected total knee arthroplasty.

Keywords: tantalum metal, infection, total knee arthroplasty, histologic retrieval analysis, ingrowth

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 The Conflict of Interest statement associated with this article can be found at doi:10.1016/j.arth.2011.10.025.

PII: S0883-5403(11)00574-2

doi:10.1016/j.arth.2011.10.025

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