A novel robot-assisted knee arthroplasty system (ROSA) and 1-year outcome: A single center experience

Area of Science:

• Orthopedic Surgery
• Robotics in Medicine
• Biomedical Engineering

Background:

• Total knee arthroplasty (TKA) is a primary treatment for knee osteoarthritis.
• Surgical techniques for TKA increasingly focus on implant alignment.
• Robot-assisted TKA has gained prominence in the last decade for improved precision.

Purpose of the Study:

• To evaluate the functional outcomes of robot-assisted total knee arthroplasty (TKA) using the ROSA system.
• To assess the impact of ROSA-assisted TKA on patient-reported outcome measures and implant alignment.
• To compare pre- and post-operative patient scores.

Main Methods:

• A retrospective study included 66 knees from 46 patients who underwent ROSA-assisted TKA for knee osteoarthritis (2021-2023).
• Data collected included preoperative planning, intraoperative times, range of motion, and follow-up duration.
• Patient outcomes were assessed using Oxford knee scores, Knee Society Scores (KSS), and Forgotten Joint Score, alongside sagittal and coronal plane alignments.

Main Results:

• Significant improvements were observed in Oxford knee scores (preop: ~17-18, postop: ~43) and KSS (preop: ~46-50, postop: ~89) for both knees.
• Mean Forgotten Joint Scores at last follow-up were 77.4 (left) and 75.4 (right).
• Surgical and follow-up times were recorded for all patients.

Conclusions:

• ROSA-supported total knee arthroplasty demonstrates functional success in treating knee osteoarthritis.
• The robot-assisted approach appears to yield favorable patient outcomes and joint function.
• Further research may explore long-term efficacy and comparative analyses with conventional methods.