Abstract
Introduction: We compared the early results of mobile-bearing knee prosthesis with fixed-bearing knee prosthesis in 20 patients who had one-stage, sequential, bilateral replacements.
Patients and Methods: In each patient, a Low Contact Stress (LCS, Depuy) rotating-platform prosthesis was inserted in one side, and an Anatomic Modular Knee (AMK, Depuy) posterior-stabilised prosthesis was inserted in the other side. The same surgical routines were adopted for both sides in each patient. The LCS and AMK knees were comparable in Knee Society knee scores, knee flexion and flexion contracture before surgery.
Results: There were significant improvements in the Knee Society knee and functional scores after surgery (p < 0.001) for both LCS and AMK knees. Although the LCS knees had better Knee Society knee score, better knee flexion, and less residual flexion contracture at final follow-up, all these were not statistically significant when compared with the AMK knees.
Discussion and Conclusion: The results of mobile-bearing knee replacements were as good as those that followed fixed-bearing knee replacements.
The abstracts were prepared by Professor Jegan Krishnan. Correspondence should be addressed to him at the Flinders Medical Centre, Bedford Park 5047, Australia.
