Joint prosthesis

A joint prosthesis comprising:

• a first member having a first bone fixation surface and a first articulating surface;
• a complementary second member having a second bone fixation surface and a second articulating surface;
• said first and second bone fixation surfaces being disposed opposite to said first and second articulating surfaces;
• and
• a set plate member secured to said first member and said second member, wherein the set plate comprises at least three outwardly extending arm members, wherein the set plate is configured to substantially prevent movement of the first member with respect to the second member, wherein the set plate member is configured to be removable during implantation of the joint prosthesis,
• wherein said first and second members include retaining members extending transversely through a major axis of said first and second members,
• wherein said retaining members are releasably secured to post members on said set plate member, and wherein at least one of the first and second members comprises a tapered posterior end, wherein one of the post members on the set plate member is larger than the other post members, the larger post member being configured to engage with the tapered posterior end of the first or second member.