Patent ID: 8366781

Claim:
A prosthesis system for replacement of a head portion of a proximal radius, comprising: a monolithic stem component defining a stem anchoring portion having a stem longitudinal axis and configured to couple to the proximal radius, and a dovetail-shaped first mounting portion extending along a mounting longitudinal axis transverse to the stem longitudinal axis; a head component having a dovetail-shaped second mounting portion slidably engaged with the first mounting portion along the mounting longitudinal axis; and a locking mechanism formed by the stem component and the head component at an interface between the stem component and the head component and movable from a disengaged state to an engaged state, wherein one of the first and second mounting portions intersects the stem longitudinal axis and the locking mechanism is engaged through relative translational movement between the stem component and the head component along the mounting longitudinal axis, the locking mechanism preventing relative movement between the stem component and the head component in either direction along the mounting longitudinal axis when moved from the disengaged state to the engaged state.