Knee prosthesis with ceramic tibial component

A knee prosthesis, comprising:

• a tibial component having an underside surface including means for seated affixation to an upper end of a prepared tibia in a patient, said tibial component further defining at least one upwardly presented bearing seat forming an articulation surface having a size and shape for articulatory engagement with a generally convex articulation surface formed on a mating femoral component;
• said tibial component being formed from ceramic monoblock material having a relatively high flexural strength and a relatively high fracture toughness for ultra-low wear upon post-implantation articulation with said femoral component articulation surface.

A knee prosthesis, comprising:

• a tibial baseplate member having an underside surface including means for seated affixation to an upper end of a prepared tibia in a patient;
• a tibial bearing insert carried by said baseplate member, said tibial bearing insert defining at least one upwardly presented bearing seat forming an articulation surface having a size and shape for articulatory engagement with a generally convex articulation surface formed on a mating femoral component;
• said articulation surface of said tibial bearing insert being formed from ceramic material having a relatively high flexural strength and a relatively high fracture toughness for ultra-low wear upon post-implantation articulation with said femoral component articulation surface.