The Journal of Arthroplasty
Volume 23, Issue 1 , Pages 74-78, January 2008

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

  • John Bottros, MD

      Affiliations

    • Department of Orthopaedic Surgery, Cleveland Clinic, Cleveland, Ohio
    • ,
  • Alison K. Klika, MS

      Affiliations

    • Department of Orthopaedic Surgery, Cleveland Clinic, Cleveland, Ohio
    • Corresponding Author InformationReprint requests: Alison K. Klika, MS, Department of Orthopaedic Surgery Cleveland Clinic, 9500 Euclid Ave, Cleveland, OH 44195.
    • ,
  • Ho H. Lee, MD, PhD

      Affiliations

    • Department of Orthopaedic Surgery, Cleveland Clinic, Cleveland, Ohio
    • ,
  • John Polousky, MD

      Affiliations

    • Department of Orthopaedics, University of Colorado School of Medicine, Denver, Colorado
    • ,
  • Wael K. Barsoum, MD

      Affiliations

    • Department of Orthopaedic Surgery, Cleveland Clinic, Cleveland, Ohio

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.

Key words: total knee arthroplasty, computer-assisted navigation, femoral extra-articular deformity, mechanical axis

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☆ 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

The Journal of Arthroplasty
Volume 23, Issue 1 , Pages 74-78, January 2008

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