A method for assembling a prosthesis system for replacement of a head portion of a proximal radius is provided and may include coupling an articulation component to a head component via a first locking portion of the articulation component and a second locking portion of the head component. The method may additionally include inserting a connection portion of the articulation component into a bore of the head component, aligning a first locking channel of the articulation component with a second locking channel of the head component, and coupling a stem to the articulation component and the head component by inserting a third locking portion of the stem into the first locking channel and the second locking channel.
