Rotating hinge vs condylar constrained knee implants in revision knee replacement
Official title: A Randomized Controlled Trial Comparing Reoperation Rates and Clinical Outcomes of Rotating Hinge Versus Condylar Constrained Knee Implants in Revision Total Knee Arthroplasty
Run by Medstar Health Research Institute · NCT07818343 · Data updated 2026-11-12
This study tests whether rotating hinge knee implants perform similarly to condylar constrained implants when used to revise knee replacements in adults.
Quick facts
| Study type | Interventional |
|---|---|
| Ages | 18 Years to 80 Years |
| Sex | All |
| Enrollment | 186 (estimated) |
| Sponsor | Medstar Health Research Institute Academic / other |
| Locations | 2 sites (Washington D.C., District of Columbia and 1 other locations) |
| Status | Recruiting |
| Started | February 1, 2026 |
| Main results expected | January 2037 |
| Study ends | January 2037 |
| Registry record updated | September 14, 2026 |
| Trial ID | NCT07818343 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Adults undergoing revision total knee arthroplasty requiring revision of both tibial and femoral components at participating centers.
✕Probably not a fit
Patients not meeting inclusion criteria, such as primary TKA, infection, age outside 18–80, pregnancy, cognitive or consent issues, or non-independent living situations, 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 interventional study compares two implant types used in revision total knee arthroplasty: rotating hinge knee (RHK) and condylar constrained knee (CCK). It looks at reoperation rates, patient satisfaction, loosening, and overall clinical outcomes, along with knee range of motion and stability at follow-up visits. The hypothesis is that RHK and CCK have similar reoperation rates and loosening rates, with potential improvements in stability and satisfaction for the rotating hinge device. The study will enroll adults undergoing revision TKA requiring both tibial and femoral component revisions, at two MedStar-affiliated centers in Maryland and Washington, DC.
Why it matters
Potential benefit: If successful, patients receiving the rotating hinge option may experience similar safety and durability to the condylar constrained option, with potential gains in knee stability and satisfaction.
How similar studies have gone: Previous studies with similar implants have shown variable outcomes, with some evidence supporting comparable reoperation and loosening rates between hinge and constrained designs in revisions.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion: * Undergoing a revision total knee arthroplasty for any etiology * Requires revision of both tibial and femoral components Exclusion: * Undergoing primary total knee arthroplasty * Candidate for only rotating hinge knee implant * Diagnosed with active infection * Does not meet age criteria of \>18 or \<80 * Pregnant or breastfeeding * Unable to consent * Non-independent dweller (prisoner)
Where it's running
-
Medstar Georgetown University Hospital
Washington D.C., District of Columbia, United States Recruiting -
Medstar Montgomery Medical Center
Olney, Maryland, United States Recruiting
Study contacts
- Study coordinator: Miles Hollimon, B.S.
- Email: miles.hollimon@medstar.net
- Phone: (202) 444-8766
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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.