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Journal of Bone and Joint Surgery - British Volume, Vol 86-B, Issue 5,
682-687.
doi: 10.1302/0301-620X.86B5.14927 Copyright © 2004 by British Editorial Society of Bone and Joint Surgery Alignment in total knee arthroplastyA COMPARISON OF COMPUTER-ASSISTED SURGERY WITH THE CONVENTIONAL TECHNIQUEH. Bäthis, MD, Orthopaedic Surgeon1; L. Perlick, MD, Consultant Orthopaedic Surgeon1; M. Tingart, MD, Orthopaedic Surgeon1; C. Lüring, MD, Orthopaedic Surgeon1; D. Zurakowski, PhD, Senior Statistican2; and J Grifka, MD, Head of Department, Senior Consultant Orthopaedic Surgeon1
1 Department of Orthopaedic Surgery, University of Regensburg, Postbox 100662, D-93042, Regensburg, Germany. Correspondence should be sent to Dr H. Bäthis. Restoration of neutral alignment of the leg is an important factor affecting the long-term results of total knee arthroplasty (TKA). Recent developments in computer-assisted surgery have focused on systems for improving TKA. In a prospective study two groups of 80 patients undergoing TKA had operations using either a computer-assisted navigation system or a conventional technique. Alignment of the leg and the orientation of components were determined on post-operative long-leg coronal and lateral films. The mechanical axis of the leg was significantly better in the computer-assisted group (96%, within ±3° varus/valgus) compared with the conventional group (78%, within ±3° varus/valgus). The coronal alignment of the femoral component was also more accurate in the computer-assisted group. Computer-assisted TKA gives a better correction of alignment of the leg and orientation of the components compared with the conventional technique. Potential benefits in the long-term outcome and functional improvement require further investigation. This article has been cited by other articles:
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