Journal
JOURNAL OF ARTHROPLASTY
Volume 30, Issue 2, Pages 199-205Publisher
CHURCHILL LIVINGSTONE INC MEDICAL PUBLISHERS
DOI: 10.1016/j.arth.2014.09.008
Keywords
EM navigation; total knee arthroplasty; randomized controlled trial; mechanical alignment; surgical accuracy; clinical outcome
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Funding
- Zimmer Incorporated (Warsaw, Indiana)
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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 degrees 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. Crown Copyright (C) 2014 Published by Elsevier Inc. All rights reserved.
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