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A prospective randomized study comparing navigation versus conventional total knee arthroplasty.

Rajkumar Selvanayagam1, Vijay Kumar1, Rajesh Malhotra1

  • 11 Department of Orthopaedics, All India Institute of Medical Science, New Delhi, India.

Journal of Orthopaedic Surgery (Hong Kong)
|May 24, 2019
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Summary
This summary is machine-generated.

Computer navigation in total knee replacement (TKR) improves alignment accuracy but does not significantly enhance clinical outcomes like the Knee Society Score (KSS) or WOMAC score after 4.6 years.

Keywords:
alignmentconventional total knee replacementfunctional outcomenavigation-assisted total knee replacement

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Area of Science:

  • Orthopedic surgery
  • Medical technology

Background:

  • Computer navigation in total knee replacement (TKR) shows promise for improved accuracy.
  • Previous studies on clinical outcomes remain inconclusive.

Purpose of the Study:

  • To compare component alignment and functional outcomes between navigation-assisted and conventional TKR.
  • To evaluate the long-term efficacy of navigation in TKR.

Main Methods:

  • Prospective randomized study comparing conventional jig-based TKR (Group A) with computer navigation-assisted TKR (Group B).
  • Assessment of coronal, sagittal, and rotational alignment via X-ray and CT scans.
  • Functional outcomes measured using Knee Society Score (KSS) and Western Ontario and McMaster University (WOMAC) scores.

Main Results:

  • Navigation demonstrated significantly higher accuracy in mechanical axis alignment (p=0.011) and femoral component rotation (p=0.033).
  • No statistically significant difference in KSS or WOMAC scores between groups at a mean follow-up of 4.6 years.

Conclusions:

  • Navigation-assisted TKR offers superior accuracy in component placement.
  • Despite improved accuracy, navigation does not lead to better clinical functional outcomes at long-term follow-up.