A method and apparatus for replacing an articular surface of a bone. The
implant includes at least one head with a bore and a lateral articular
surface generally perpendicular to an axis of the bore. A holding element
includes a stem at a proximal end adapted to attach to the bone. A member
at a distal end of the holding device is adapted to engage with the bore
in the head so that the lateral articular surface is positioned to engage
transverse loads. The bore permits limited lateral translation of the
head in at least one direction generally perpendicular to a longitudinal
axis of the member.