Tibial Stems in Revision Total Knee Arthroplasty: Is There an Anatomic Conflict?

Mohamed S. Gobba, Newton Chan, Rikin Patel, Philip C. Noble, Stephen J. Incavo

Research output: Contribution to journalArticle

9 Scopus citations

Abstract

Tibial stems are frequently used in revision total knee arthroplasty (TKA). We investigated the effect of tibial stems on final component alignment and tray position. Thirty 3D reconstructed cadaveric tibial models were classified according to canal bow angle. After virtual implantation of 120 mm and 200 mm stemmed tibial components, deviation from native mechanical axis was measured. Tibial alignment valgus malposition of up to three degrees occurred and most pronounced with 120 mm stems. Canal alignment using 200 mm stems deviated tray position medially and posteriorly. Mild to moderate valgus bowing of the tibial canal is not uncommon (57% in our series) possibly leading to valgus malalignment. Anatomic conflict between the tibial mechanical axis and intramedullary canal can exist, with alignment and tray placement implications.

Original languageEnglish (US)
Pages (from-to)86-89
Number of pages4
JournalJournal of Arthroplasty
Volume30
Issue number9
DOIs
StatePublished - Sep 1 2015

Keywords

  • Alignment angle
  • Revision total knee arthroplasty
  • Tibial stems
  • Tibial tray
  • Tibial tubercle

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine

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