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Volume 23, Issue 1, Pages 74-78 (January 2008)


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The Use of Navigation in Total Knee Arthroplasty for Patients With Extra-Articular Deformity

John Bottros, MD, Alison K. Klika, MSCorresponding Author Information, Ho H. Lee, MD, PhD, John Polousky, MD, Wael K. Barsoum, MD

Received 21 July 2006; accepted 22 January 2007. published online 24 September 2007.

Abstract 

Computer-assisted navigation for total knee arthroplasty provides high technology instrumentation that may improve the technique for restoring the normal lower limb mechanical axis. This study evaluated the use of computer-assisted navigation in 7 patients (9 total knee arthroplasties) with a radiographic femoral extra-articular deformity. Postoperatively, the mechanical axis deviated medially by a mean of 1.3° ± 0.9° (range, −0.2° to 2.5°). Early patient outcomes showed an increase in the average preoperative to postoperative Knee Society Scores (from 62 to 92, P < .05), function scores (from 52 to 83, P < .05), and range of motion (from 4°-74° to 0.6°-98°, P < .05). These results support the use of computer-assisted navigation as effective high technology instrumentation in recreating an acceptable mechanical axis in patients with distorted anatomical landmarks.

 Department of Orthopaedic Surgery, Cleveland Clinic, Cleveland, Ohio

 Department of Orthopaedics, University of Colorado School of Medicine, Denver, Colorado

Corresponding Author InformationReprint requests: Alison K. Klika, MS, Department of Orthopaedic Surgery Cleveland Clinic, 9500 Euclid Ave, Cleveland, OH 44195.

 No benefits or funds were received in support of this study.

PII: S0883-5403(07)00065-4

doi:10.1016/j.arth.2007.01.021


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