Management of the Stiff Total Knee Arthroplasty with Revision to a Total Condylar Bearing Rotating Platform Prosthesis

Abstract

Purpose: Evaluate the efficacy of revision knee surgery with rotating platform prosthesis for treating stiffness associated with total knee arthroplasty. Methods: Between 2005 and 2007, twelve patients were treated by a single surgeon with a total condylar bearing rotating platform prosthesis for post-operative knee stiffness. Average age of patients was 60 years and the revision procedure was performed on average 8 months after the primary knee arthroplasty. Results: Post-operatively, all patients had stability to varus/valgus and anterior/posterior testing, and all patients had normal overall alignment. Knee extension increased an average of 16.3 degrees, knee flexion increased an average of 30.1 degrees, and total range of motion increased an average of 46.4 degrees. Modified knee score utilizing the range of motion, alignment, and stability components of the Knee Society Clinical Rating System increased an average of 17.9 points. All improvements were statistically significant (p<0.05). Conclusion: Revision to a total condylar bearing rotating platform prosthesis significantly improves ROM and function while maintaining stability and alignment for patient suffering from stiffness following a total knee arthroplasty.