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dc.contributor.authorKeene, G.-
dc.contributor.authorSimpson, D.-
dc.contributor.authorKalairajah, Y.-
dc.identifier.citationJournal of Bone and Joint Surgery: British Volume, 2006; 88B(1):44-48-
dc.description.abstractTwenty patients underwent simultaneous bilateral medial unicompartmental knee arthroplasty. Pre-operative hip-knee-ankle alignment and valgus stress radiographs were used to plan the desired post-operative alignment of the limb in accordance with established principles for unicompartmental arthroplasty. In each patient the planned alignment was the same for both knees. Overall, the mean planned post-operative alignment was to 2.3° of varus (0° to 5°). The side and starting order of surgery were randomised, using conventional instrumentation for one knee and computer-assisted surgery for the opposite side. The mean variation between the pre-operative plan and the achieved correction in the navigated and the non-navigated limb was 0.9° (sd 1.1; 0° to 4°) and 2.8° (sd 1.4; 1° to 7°), respectively. Using the Wilcoxon signed rank test, we found the difference in variation statistically significant (p < 0.001). Assessment of lower limb alignment in the non-navigated group revealed that 12 (60%) were within ± 2° of the pre-operative plan, compared to 17 (87%) of the navigated cases. Computer-assisted surgery significantly improves the post-operative alignment of medial unicompartmental knee arthroplasty compared to conventional techniques in patients undergoing bilateral simultaneous arthroplasty. Improved alignment after arthroplasty is associated with better function and increased longevity.-
dc.publisherBritish Editorial Soc Bone Joint Surgery-
dc.rights© 2006 British Editorial Society of Bone and Joint Surgery-
dc.subjectAnkle Joint-
dc.subjectHip Joint-
dc.subjectKnee Joint-
dc.subjectBone Malalignment-
dc.subjectOsteoarthritis, Knee-
dc.subjectTreatment Outcome-
dc.subjectPreoperative Care-
dc.subjectSurgery, Computer-Assisted-
dc.subjectArthroplasty, Replacement, Knee-
dc.subjectProspective Studies-
dc.subjectMiddle Aged-
dc.titleLimb alignment in computer-assisted minimally-invasive unicompartmental knee replacement-
dc.typeJournal article-
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Centre for Automotive Safety Research publications

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