The Use of CCK vs PS in Revision TKAs

Recruiting now · Phase 4

Conditions studied: Aseptic Loosening of Prosthetic Joint, Instability of Prosthetic Joint, Reimplantation for Periprosthetic Joint Infection, Femoral Revision Indicated, Tibial Component Revision

In brief

This study aims to compare the clinical impact of Constrained Condylar versus Posterior Stabilized Knee (PS) bearings on patient satisfaction and surgical outcomes including mid-term survivorship among patients undergoing revision total knee arthroplasty.

Key facts

Study ID

NCT06782295

Run by

Rush University Medical Center

People needed

170

Starts

2025-07-01

Expected to finish

2038-07-01

Last updated by the study team

2025-11-14

Who can join

Age: 18 and older. Sex: any. Healthy volunteers: not accepted.

You may qualify if…

• Patients between 18-80 years of age
• Patients who are undergoing both femoral and tibial component revisions, or isolated femoral component revisions with a retained tibial component that is compatible with PS or CCK bearings
• Patients who are at least 6-weeks out from primary TKA surgery, with complete pre-operative and post-operative knee radiographs obtained at standard of care perioperative visits (AP/lateral and patellar views)
• Patients undergoing rTKA for indications including aseptic component loosening, flexion or extension coronal or sagittal instability, component malalignment, arthrofibrosis, patellar maltracking, reimplantation following single or two-stage exchange revision for prosthetic joint infection or bearing surface wear when femoral or tibial component revision is indicated.
• The use of revision total knee arthroplasty systems which have PS and CCK bearing options including different degree options of coronal and rotational constraint (to be individually randomized per constrained option):
• Zimmer Biomet Persona, NexGen, or Vanguard
• Smith and Nephew Legion
• DJO / Enovis Empowr
• Stryker Triathlon
• Link SymphoKnee
• Depuy Attune sion Criteria:

You may not qualify if…

• Patients undergoing rTKA with a hinged implant, or pre-operatively determined to require CCK bearing rTKA, > 80 years of age, or those requiring rTKA less than 6-weeks from the primary TKA,
• Patients undergoing rTKA for bearing exchange only rTKA, isolated tibial component rTKA
• Patients with pre-operative diagnosis of extensor mechanism disruption or collateral ligament incompetence or with a compromised soft tissue envelope requiring pre-pre-operative plastic surgery evaluation and planned soft tissue coverage.

Where it is running

• Rush University Medical Center — Chicago, Illinois, United States (enrolling)

Full record on ClinicalTrials.gov

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