Electromagnetic navigation in total knee arthroplasty—a single center, randomized, single-blind study comparing the results with conventional techniques

Mark J.G. Blyth, Julie R. Smith, Iain C. Anthony, Neville E. Strict, Philip J. Rowe, Bryn G. Jones

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Abstract

We report on the results of a randomized study (n = 200) to compare total knee arthroplasty performed using conventional instrumentation or electromagnetic computer assisted surgical technique. 92% of navigated and 85% of conventional knees were implanted within ± 3° from neutral mechanical alignment; there was no statistically significant difference between these proportions. There was also no difference in femoral or tibial rotation assessed by CT scan. At 1 year follow up there was no statistical difference between the two groups in American Knee Society Score, Oxford Knee Scores, patient satisfaction, quality of life, hospital length of stay, complication rates or other adverse events. Tourniquet time in the navigated group was longer. Proving value for navigation in total knee arthroplasty surgery remains a challenge.
Original languageEnglish
Pages (from-to)199-205
Number of pages7
JournalJournal of Arthroplasty
Volume30
Issue number2
Early online date16 Sep 2014
DOIs
Publication statusPublished - Feb 2015

Keywords

  • EM navigation
  • total knee arthroplasty
  • randomized controlled trial
  • mechanical alignment
  • surgical accuracy
  • clinical outcome

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