RSA of Implant Migration in Robotic vs Conventional BCS Cemented TKA .
Radiostereometric measurement of implant migration in robotically assisted vs conventional bi-cruciate stabilized cemented total knee arthroplasty: secondary analysis of a randomized controlled trial.
Acta Orthop . 2025 Mar 24:96:283-289.Fifty-one patients with osteoarthritis were randomized to receive robotically assisted (n=26) or conventional (n=25) cemented bi-cruciate stabilized total knee arthroplasty. The primary outcome was maximum total point motion (MTPM) of the tibial component at 1 and 2 years, measured via radiostereometric analysis. Secondary outcomes included tibial rotations (x-, y-, z-axes), subsidence, and lift-off. Follow-up assessments were performed at 3, 12, and 24 months. Overall, the robotic group demonstrated higher MTPM at both 12 months and 24 months, as well as greater flexion/extension rotation at 24 months. Migration between 12–24 months did not differ significantly between groups. These findings suggest robotic assistance resulted in greater early migration, though all values remained within accepted safe thresholds.
Unlock the Full ACE Report
You have access to 4 more FREE articles this month.
Click below to unlock and view this ACE Reports
Unlock Now
Critical appraisals of the latest, high-impact randomized controlled trials and systematic reviews in orthopaedics
Access to OrthoEvidence podcast content, including collaborations with the Journal of Bone and Joint Surgery, interviews with internationally recognized surgeons, and roundtable discussions on orthopaedic news and topics
Subscription to The Pulse, a twice-weekly evidence-based newsletter designed to help you make better clinical decisions
Exclusive access to original content articles, including in-house systematic reviews, and articles on health research methods and hot orthopaedic topics