Patent ID: 6413279
Filing Date: 2002-07-02
Classification: A61F

Abstract:
A knee joint prosthesis for replacing an articulating knee portion of a femur and a tibia, said knee joint prosthesis comprising:a femoral component having an engagement member, a first femoral bearing surface and a second femoral bearing surface; a tibial component having a tibial bearing surface; a guide post extending from said tibial component and operable to be engaged by said engagement member of said femoral component; and a bearing member having a first bearing surface operable to articulate with said first femoral bearing surface, a second bearing surface operable to articulate with said second femoral bearing surface, and a third bearing surface operable to articulate with said tibial bearing surface, said bearing member further having an outer peripheral wall that includes a pair of posterior lip extensions that extend out along said third bearing surface so that said third bearing surface extends further posteriorly than said first and second bearing surfaces, wherein said bearing member is substantially inhibited from dislocating upon flexion of said knee joint prosthesis.