Patent ID: 9107755
Filing Date: 2015-08-18
Classification: A61F

Abstract:
1. A knee prosthesis including a tibial prosthesis, said tibial prosthesis comprising: a tibial component having a polymeric body and at least one non-polymeric articulating portion, said polymeric body having an upper surface, said at least one non-polymeric articulating portion having a perimeter and an articulating surface configured for articulating with a chosen one of a femoral prosthesis and a natural femur, said non-polymeric articulating portion received and secured within said polymeric body in a fixed position to prevent relative movement between the non-polymeric articulating portion and the polymeric body, wherein said polymeric body surrounds said perimeter of said non-polymeric articulating portion and said articulating surface of said non-polymeric articulating portion is substantially flush with said upper surface of said polymeric body, wherein, if during articulation the chosen one of a femoral prosthesis and a natural femur advances off of said articulating surface of said non-polymeric articulating portion and onto said upper surface of said polymeric body, a transition from said articulating surface of said non-polymeric articulating portion to said upper surface of said polymeric body will occur smoothly, as no sudden increase and no sudden decrease in a height of a surface against which the chosen one of a femoral prosthesis and a natural femur articulates is encountered during said transition; and a tibial tray component, said tibial tray component having a plate and a stem, said polymeric body of said tibial component configured for securement to said plate of said tibial tray component.