Patent ID: 6923832

Claim:
A tibial implant comprising: a stem for insertion, in use, in the intramedullary canal of a natural tibia, said stem having a longitudinal axis, a distal end and a proximal end; a tray having an upper surface, a lower surface, and an engagement portion positioned on the lower surface, wherein said engagement portion defines a ring member having a closed upper portion and inner and outer ring surfaces and an opening through said inner and outer ring surfaces, the inner surface of said ring having a dovetailed surface formed thereon; a bushing for joining said stem and said tray, said bushing having a proximal end, a proximal axis of alignment, an engagement surface on said proximal end for engagement with said engagement portion of said tray, at least one portion of said engagement surface configured for insertion through said opening and at least another portion of said engagement surface configured for complementary sliding engagement with said dovetailed surface and rotational movement about said proximal axis of alignment, a distal end a distal axis of alignment, said distal end of said bushing being configured for engagement with said proximal end of said stem, such that said distal axis of alignment of said bushing is substantially co-linear to said longitudinal axis of said stem; and a locking member for locking said bushing at a desired degree of rotation about said proximal axis of alignment.