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The Knee Care Press

Weekly

Study confirms the high accuracy of a new robotically assisted technique for total knee arthroplasty.


Conventional total knee arthroplasty (TKA) replacement studies have shown that pain, instability and limitation of the range of motion are the most commonly reported symptoms among unsatisfied patients. The major cause of unsuccessful TKA are inadequate alignment and errors in balancing.


Robotic TKA has gained popularity over the last few years for improving the accuracy of implant positioning and reducing issues with limb alignment. A recent study by Rossi et al. compared planned vs validated measures and post-operative X-rays for robotic-assisted TKA.

For this study, 75 patients underwent TKA using a new robotic system (ROSA® Knee System; Zimmer Biomet, Warsaw, IN) with a Persona® Knee System using posterior stabilized implants. The planned, validated and measured angles and cuts for the distal and posterior femur, for the proximal tibia and for the final coronal alignment on long standing X-rays were compared to determine whether there was a difference in planned vs. actual resections. The average difference was below 1mm or under 1 degree and no statistical difference was found between planned validated and measured cuts. The average difference between TKA and measured was 1.2 ± 1.1.

This study demonstrates that it is possible to perform accurate bone cuts and to achieve the planned angles and resections when using this new surgical robot in TKA.

Rossi S M P, Sangaletti R, Perticarini L, Terragnoli F, Benazzo F. Read more: https://pubmed.ncbi.nlm.nih.gov/34981162/

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