| 摘要 |
The present invention generally comprises a fixed bearing prosthesis and a mobile bearing prosthesis. The fixed bearing prosthesis comprises a tibial component, a femoral component and a meniscal component and addressees the loss of congruency during deep knee flexion and the possible direct, repetitive contact of the tibial and femoral components. The tibial component of the fixed bearing prosthesis includes a tibial platform having an anterior and posterior edge. The meniscal component of the fixed bearing prosthesis includes a posterior ridge overlapping the posterior edge of the tibial platform that prevents metal-to-metal contact during deep knee flexion. The mobile bearing prosthesis comprises generally a tibial component, a femoral component and a meniscal component addresses the lack of conformity to natural biomechanical movement. The tibial component comprises a tibial platform having a curved rail system designed to mimic the asymmetrical rotation of femoral rollback while simultaneously providing sufficient anterior-posterior translation.
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