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Published on: November 28, 2025
Simultaneous bilateral total knee arthroplasty with robotic and conventional techniques: a prospective, randomized
Eun-Kyoo Song1, Jong-Keun Seon, Sang-Jin Park
1Center for Joint Diseases, Chonnam National University Hwasun Hospital, 160 Ilsimri, Hwasuneup, Hwasungun, Jeonnam 519-809, Korea.
Summary
Robotic total knee arthroplasty (TKA) demonstrated superior leg alignment accuracy compared to conventional TKA. This improved precision in robotic knee replacement may lead to better clinical and radiological outcomes for patients.
Area of Science:
- Orthopedic Surgery
- Biomedical Engineering
- Robotics in Medicine
Background:
- Total knee arthroplasty (TKA) is a common procedure for end-stage knee arthritis.
- Achieving optimal limb alignment and component positioning is crucial for TKA success.
- Robotic assistance is emerging as a tool to enhance surgical precision.
Purpose of the Study:
- To compare the outcomes of robotic-assisted versus conventional TKA within the same patient.
- To evaluate the hypothesis that robotic TKA yields better leg alignment and component orientation.
- To assess the impact on patient satisfaction and clinical/radiological results.
Main Methods:
- Bilateral sequential total knee replacement in 30 patients.
- One knee underwent robotic-assisted implantation; the contralateral knee underwent conventional implantation.
- Comparative analysis of radiographic alignment, clinical scores, and range of motion (ROM).
Main Results:
- Robotic-assisted TKA showed significantly fewer outliers in postoperative leg alignment (mechanical axis, femoral/tibial prosthesis inclination).
- Robotic sides demonstrated non-significantly better postoperative knee scores and ROM.
- Robotic TKA required longer operative times and larger incisions but resulted in significantly less blood loss.
Conclusions:
- Robotic-assisted TKA offers superior accuracy in achieving desired leg alignment.
- The enhanced precision of robotic TKA may positively impact clinical and radiological outcomes.
- Robotic TKA presents a promising advancement for improving total knee replacement procedures.
