Patent ID: 8105387

Claim:
An orthopaedic prosthesis comprising: a tibial tray configured to be coupled to a surgically-prepared surface of the proximal end of a tibia, the tibial tray including a platform having an upper surface, a bottom surface, and an outer side surface extending between the upper surface and the bottom surface, the side surface having a taper; a tibial insert coupled to the tibial tray, the tibial insert having (i) an upper bearing surface configured to contact a pair of femoral condyles, (ii) a bottom surface in contact with the upper surface of the tibial tray, and (iii) an outer side surface extending between the upper bearing surface and the bottom surface; and a metal rim secured to the outer side surface of the tibial insert and extending downwardly with respect to the bottom surface of the tibial insert, the metal rim having a taper corresponding to the taper of the outer side surface of the tibial tray such that the metal rim is in contact with and overlaps the outer side surface of the tibial tray to form a friction lock therebetween.