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Comparison of Minimally Invasive Unicompartmental Knee Arthroplasty With or Without a Navigation System

Abstract The authors investigated the hypothesis that navigation system–assisted minimally invasive unicompartmental knee arthroplasty (NA-MIS UKA) produces better short-term clinical results than MIS UKA without a navigation system. After a minimum 2-year follow-up, short-term functional results an...

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Bibliographic Details
Published in:The Journal of arthroplasty 2009-04, Vol.24 (3), p.351-357
Main Authors: Keun Seon, Jong, MD, Kyoo Song, Eun, MD, Jin Park, Sang, MD, Rim Yoon, Taek, MD, Bae Lee, Keun, MD, Taek Jung, Sung, MD
Format: Article
Language:English
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Summary:Abstract The authors investigated the hypothesis that navigation system–assisted minimally invasive unicompartmental knee arthroplasty (NA-MIS UKA) produces better short-term clinical results than MIS UKA without a navigation system. After a minimum 2-year follow-up, short-term functional results and component alignment accuracies of 31 knees that underwent NA-MIS UKA (the NA-MIS group) were compared with those of 33 knees that underwent MIS UKAs without a navigation system (the MIS group). The Hospital for Special Surgery and Western Ontario and McMaster Universities Osteoarthritis Index scores of 2 groups showed significant improvement at final follow-ups, but no significant intergroup differences were observed ( P = .071 and P = .096, respectively). However, NA-MIS UKA produced more improvement in the desired mechanical axis and a lower percentage of prosthetic alignment outliers than MIS UKA.
ISSN:0883-5403
1532-8406
DOI:10.1016/j.arth.2007.10.025