Imageless ROSA® Robotic Arm-Assisted Total Knee Arthroplasty Is Associated With Improved Accuracy Compared to...

Area of Science:

• Orthopedic Surgery
• Robotics in Medicine
• Biomechanical Engineering

Background:

• Total knee arthroplasty (TKA) is a common procedure to address knee osteoarthritis.
• Advancements in surgical robotics offer potential improvements in precision and outcomes.
• The imageless Robotic Surgical Assistant (ROSA®) Knee System is one such technology for TKA.

Purpose of the Study:

• To compare the clinical and radiographic outcomes of conventional TKA versus robotic-assisted TKA.
• To evaluate the efficacy of the ROSA® Knee System in TKA procedures.

Main Methods:

• A prospective study comparing 23 conventional TKA patients with 27 robotic-assisted TKA patients.
• All surgeries performed by a single surgeon; radiographic measurements by two observers.
• Follow-up duration averaged 20.8 months for conventional and 17.6 months for robotic TKA.

Main Results:

• Robotic TKA showed significantly better radiographic alignment in coronal and sagittal planes (90.1% vs. 34.9%).
• Surgical time was longer for robotic TKA (78.3 min vs. 70.1 min).
• No significant differences in length of stay, patellar resurfacing, cementation, PCL resection, range of motion, or patient satisfaction were observed.

Conclusions:

• Robotic-assisted TKA using the ROSA® system demonstrates superior radiographic alignment compared to conventional TKA.
• Despite improved alignment, robotic TKA did not show significant advantages in range of motion or patient satisfaction.
• Further research may explore long-term functional benefits and cost-effectiveness.