Simultaneous bilateral total knee arthroplasty with robotic and conventional techniques: a prospective, randomized study

Knee Surg Sports Traumatol Arthrosc. 2011 Jul;19(7):1069-76. doi: 10.1007/s00167-011-1400-9. Epub 2011 Feb 11.


Purpose: The authors performed this study to compare the outcomes of robotic-assisted and conventional TKA in same patient simultaneously. It was hypothesized that the robotic-assisted procedure would produce better leg alignment and component orientation, and thus, improve patient satisfaction and clinical and radiological outcomes.

Methods: Thirty patients underwent bilateral sequential total knee replacement. One knee was replaced by robotic-assisted implantation and the other by conventional implantation.

Results: Radiographic results showed significantly more postoperative leg alignment outliers of conventional sides than robotic-assisted sides (mechanical axis, coronal inclination of the femoral prosthesis, and sagittal inclination of the tibial prosthesis). Robotic-assisted sides had non-significantly better postoperative knee scores and ROMs. Robotic-assisted sides needed longer operation times (25 min, SD ± 18) and longer skin incisions. Nevertheless, postoperative bleeding was significantly less for robotic-assisted sides.

Conclusion: The better alignment accuracy of robotic TKA and the good clinical results achieved may favorably influence clinical and radiological outcomes.

Publication types

  • Comparative Study
  • Randomized Controlled Trial

MeSH terms

  • Aged
  • Arthroplasty, Replacement, Knee / methods*
  • Female
  • Humans
  • Middle Aged
  • Osteoarthritis, Knee / surgery*
  • Prospective Studies
  • Robotics*
  • Treatment Outcome