Imageless vs. image-based navigation in robot-assisted knee replacement
Official title: Outcomes of Robotic-Assisted Total Knee Arthroplasty With Imageless Navigation Versus Image-Based Navigation: A Randomised, Single-Blinded, Non-Inferiority Trial
Run by Medical University of Warsaw · NCT07522489 · Data updated 2026-11-12
This study tests whether imageless navigation is as good as image-based navigation for robotic-assisted total knee replacement in people with knee osteoarthritis.
Quick facts
| Study type | Interventional |
|---|---|
| Ages | 18 Years and up |
| Sex | All |
| Enrollment | 146 (estimated) |
| Sponsor | Medical University of Warsaw Academic / other |
| Locations | 1 site (Warsaw, Mazovian) |
| Status | Recruiting |
| Started | August 6, 2026 |
| Main results expected | January 2029 |
| Study ends | January 2029 |
| Registry record updated | August 13, 2026 |
| Trial ID | NCT07522489 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Adults with radiologically confirmed, symptomatic end-stage knee osteoarthritis eligible for primary robotic-assisted TKA.
✕Probably not a fit
Patients with conditions or factors that limit functional assessment or affect outcomes (e.g., active infections, significant neurologic disease) may not benefit.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This randomized trial compares imageless navigation to image-based navigation during robotic-assisted total knee arthroplasty for end-stage knee osteoarthritis. Participants are assigned 1:1 to either method and followed for 12 months, with functional surveys and postoperative checkups. All procedures are performed by experienced surgeons using a standardized surgical protocol. The primary focus is on functional outcomes and postoperative complications, with remote monitoring and radiographic assessments as part of the evaluation.
Why it matters
Potential benefit: If successful, the imageless approach could offer similar outcomes with potentially simpler setup and reduced imaging requirements.
How similar studies have gone: Previous research in navigation methods for TKA has shown comparably effective results between imageless and image-based approaches in some contexts; this trial seeks to confirm with a specific robotic-assisted protocol.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria: 1. Symptomatic, radiologically confirmed advanced osteoarthritis of the knee. 2. Patients referred for primary robotic-assisted total knee arthroplasty. 3. Patients in whom a correctly performed radiograph with designated sensors has confirmed the possibility of performing robotic-assisted total knee arthroplasty with image-based navigation. 4. Patients capable of giving informed consent to participate in the study and willing to attend all follow-up visits. Exclusion Criteria: 1. No informed consent for the surgery. 2. No informed consent for taking part in the study. 3. Pregnancy. 4. Active infections. 5. Diagnosed comorbidities: autoimmune arthritis, malignant tumors, serious neurological disorders affecting a reliable functional outcome measurement (e.g., severe stroke, severe Parkinson's disease).
Where it's running
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Department of Orthopedics and Locomotor Traumatology, Medical University of Warsaw
Warsaw, Mazovian, Poland Recruiting
Study contacts
- Principal investigator: Paweł Łęgosz, MD, Professor — Medical University of Warsaw
- Study coordinator: Paweł Kasprzak, MD
- Email: pawel.kasprzak@wum.edu.pl
- Phone: 22 50 21 514
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How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.