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

Chris Sambaziotis, Andrew J. Lovy, Karyn E. Koller, Roy D. Bloebaum, David M. Hirsh, Sun Jin Kim

Research output: Contribution to journalArticle

11 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)1413.e5-1413.e9
JournalJournal of Arthroplasty
Issue number7
StatePublished - Aug 2012



  • Histologic retrieval analysis
  • Infection
  • Ingrowth
  • Tantalum metal
  • Total knee arthroplasty

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine

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