Patent ID: 7445639

Claim:
A modular tibial component for a knee joint prosthesis, the modular tibial component comprising: a tibial tray having a support surface and a first extension; a tibial stem having a main body portion and a second extension; an adapter body extending along a longitudinal axis and connecting the tray and the stem and establishing a nonzero offset between the first extension of the tray and the second extension of the stem, the adapter body defining a first cavity to receive the first extension of the tray and a second cavity to receive the second extension of the stem, the adapter body further including a sidewall defining an opening communicating with a passage, the passage transversely intersecting the longitudinal axis and the first and second cavities; and a locking mechanism for coupling the tray to the stem, the locking mechanism including a first locking element passing through the opening into the passage and coupling the first and second extensions.