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NCT07818343NARecruiting

Hinge vs CCK Implants

Medstar Health Research Institute

Start Date

2/1/2026

Completion Date

1/1/2037

Summary

The primary purpose of this study is to compare reoperation rates for rotating hinge knee implants versus condylar constrained knee implants when used in revision total knee arthroplasty. The secondary purposes are to compare patient satisfaction, loosening rates and clinical outcomes for RHK implants compared to CCK implants in rTKA. Additionally, knee range of motion and stability will be assessed and compared at all follow-up time points. We hypothesize that RHK implants provide patients undergoing rTKA with similar reoperation rates to those of patients who receive a CCK implant. The investigators hypothesize that patients who receive an RHK implant will have similar loosening rates and clinical outcomes compared to patients who receive a CCK implant. Lastly, knee stability and patient satisfaction may improve with the use of a rotating hinge device.

Eligibility Criteria

Age Range: 18 years to 80 years

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)

Interventions

DEVICE

Condylar Constrained knee system. ( NexGen Legacy Condylar Constrained Knee by Zimmer Biomet)

DEVICE

Rotating Hinge Knee ( NexGen Rotating Hinge Knee by Zimmer Biomet)

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Conditions

Revision ArthroplastyKnee

Locations

Medstar Georgetown University Hospital

Washington D.C., District of Columbia 20007

United States

Medstar Montgomery Medical Center

Olney, Maryland 20832

United States