Intraoperative navigation of patient-specific instrumentation does not predict final implant position

Matthew P. Abdel, Philipp von Roth, Hagen Hommel, Carsten Perka, Tilman Pfitzner

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


The purpose of this study was to determine if intraoperative navigation predicted final implant position of total knee arthroplasties (TKAs) performed with patient-specific instrumentation (PSI). We retrospectively reviewed 60 TKAs performed with PSI and imageless navigation. These values were compared to postoperative coronal alignment based on long-leg radiographs, as well as rotation and tibial slope based on CT scans. The intraoperative coronal position of the tibia as measured by the intraoperative navigation indicated a significantly higher deviation from the neutral mechanical axis than the actual final position (P= 0.03). Similarly, tibial slope and femoral component rotation measured by intraoperative navigation significantly deviated from the final slope and femoral component rotation (P < 0.0001). In conclusion, intraoperative navigation of PSI position showed a significantly high deviation from the true final implant position. Level of Evidence: Level III, therapeutic. See Instructions to Authors for a complete description of levels of evidence.

Original languageEnglish (US)
Pages (from-to)564-566
Number of pages3
JournalJournal of Arthroplasty
Issue number4
StatePublished - Apr 1 2015


  • Femoral rotation
  • Intraoperative navigation
  • Mechanical axis
  • Patient-specific instrumentation (PSI)
  • Total knee arthroplasty (TKA)

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine


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