Computer-Assisted Gap Equalization in Total Knee Arthroplasty Journal Articles uri icon

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  • This in vitro biomechanical study compared a conventional balancing technique in knee arthroplasty to a technique using computer assistance. The experimental technique used a soft tissue tensioner instrumented with computer-monitored load cells to quantify soft tissue tension. To assess outcome, a tibial load transducer measured medial and lateral compartment forces and tibial rotation. An electromagnetic tracking system quantified knee position under simulated muscle loading. The computer-assisted technique improved knee balance before insertion of components. However, once components were implanted, there was no difference in knee load balance between the 2 techniques. No correlation was shown between compartmental load balance and tibial rotation or mechanical axis misalignment. Although computer-assisted surgery may improve technical accuracy, further work is necessary to achieve an optimal final knee load balance.


  • Viskontas, Darius G
  • Skrinskas, Tomas V
  • Johnson, James A
  • King, Graham J
  • Winemaker, Mitchell
  • Chess, David G

publication date

  • April 2007