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  • Title: The use of navigation in total knee arthroplasty for patients with extra-articular deformity.
    Author: Bottros J, Klika AK, Lee HH, Polousky J, Barsoum WK.
    Journal: J Arthroplasty; 2008 Jan; 23(1):74-8. PubMed ID: 18165033.
    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 degrees +/- 0.9 degrees (range, -0.2 degrees to 2.5 degrees ). 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 degrees -74 degrees to 0.6 degrees -98 degrees , 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.
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